Programmierung
Flutter For Dummies
CREATE AWESOME IOS AND ANDROID APPS WITH A SINGLE TOOL!Flutter is an app developer’s dream come true. With Google’s open source toolkit, you can easily build beautiful apps that work across platforms using a single codebase. This flexibility allows you to get your work out to the widest possible audience. With Flutter already being used by thousands of developers worldwide in a market where billions of apps are downloaded every year, now is the right time to get ahead of the curve with this incredible tool.Flutter for Dummies is your friendly, ground-up route to creating multi-platform apps.From how to construct your initial frameworks to writing code in Dart, you’ll find the essentials you need to ride the Flutter revolutionary wave to success. This book includes how to create an intuitive and stunning UI, add rich interactivity, and easily pull in data. You’ll also see how Flutter features like Hot Reload—providing sub-second refreshes as you refine your work—help you make sure your app is a delight to use.* Start simple: follow steps to build a basic app * It’s alive! Keep connected to online data * It moves! Make things fun with animated features * Get the word out: use tips to expand your audience Whether you’re a fledgling developer or an expert wanting to add a slick feather to your programming cap, join the Flutter revolution now and soar above the rest!BARRY BURD, PHD, is a veteran educator and a professor of mathematics and computer science at Drew University. When he's not lecturing at the university, Barry speaks at professional conferences and somehow finds time to write books, including Java For Dummies and Beginning Programming with Java For Dummies.INTRODUCTION 1How to Use This Book 1Conventions Used in This Book 2What You Don’t Have to Read 2Foolish Assumptions 3How This Book is Organized 4Part 1, “Getting Ready” 4Part 2, “Flutter: A Burd’s-Eye View” 4Part 3, “Details, Details” 4Part 4, “The Part of Tens” 4More on the web! 5Icons Used in This Book 5Beyond the Book 6Where to Go from Here 6PART 1: GETTING READY 7CHAPTER 1: WHAT IS FLUTTER? 9Hardware and Software (Things You May Already Know) 10Where Does Flutter Fit In? 15Cross-platform development 15A quick-and-easy development cycle 17A great way to think about app development 25Enough New Terminology! What’s Next? 28CHAPTER 2: SETTING UP YOUR COMPUTER FOR MOBILE APP DEVELOPMENT 29The Stuff You Need 30What to Do 32Getting and installing the stuff 32For Mac users only 34Configuring Android Studio 35Running your first app 36Dealing with the Devil’s Details 43On installing Android Studio 43On launching Android Studio for the first time 44On installing Android Studio’s Flutter plugin 44On adding virtual devices 46On installing Flutter 50Divisiveness Among Devices 52Running apps on an Android device 52Testing apps on a physical device 53Using Android Studio 59Starting up 59The main window 60Running This Book’s Sample Programs 63Enjoying reruns 65If you’re finicky 65Were These Setup Steps Fun or What? 66PART 2: FLUTTER: A BURD’S-EYE VIEW 67CHAPTER 3: “HELLO” FROM FLUTTER 69First Things First 69What’s it all about? 72A constructor’s parameters 75A note about punctuation 76Don’t relent — simply indent 77Classes, Objects, and Widgets 79A brief treatise on “within-ness” 81The documentation is your friend 82Making Things Look Nicer 83Creating a scaffold 86Adding visual tweaks 88Dart’s enum feature 89Hello from sunny California! 89Adding another widget 91Centering the text (Part 1) 94Centering the text (Part 2) 97Displaying an image 100Hey, Wait a Minute 104CHAPTER 4: HELLO AGAIN 105Creating and Using a Function 106The function declaration 107A function call 108Parameters and the return value 108Programming in Dart: The Small Stuff 112Statements and declarations 112Dart’s typing feature 113Literals, variables, and expressions 114Two for the price of one 117Dart’s var keyword 119Built-in types 121Types that aren’t built-in 123Using import declarations 123Variations on a Theme from Die Flutter Mouse 124Type names in function declarations 127Naming your parameters 128What about the build function? 129More Fun to Come! 130CHAPTER 5: MAKING THINGS HAPPEN 131Let’s All Press a Floating Action Button 132Stateless widgets and stateful widgets 134Widgets have methods 135Pay no attention to the framework behind the curtain 139Enhancing Your App 146More parameters, please 148The override annotation 151What does mean? 152Anonymous functions 153What belongs where 156Names that start with an underscore 160Whew! 162CHAPTER 6: LAYING THINGS OUT 163The Big Picture 164Creating bite-size pieces of code 167Creating a parameter list 169Living color 170Adding padding 171Your humble servant, the Column widget 173The SizedBox widget 175Your friend, the Container widget 176Nesting Rows and Columns 181More Levels of Nesting 183Using the Expanded Widget 186Expanded versus unexpanded 189Expanded widget saves the day 192Flexing some muscles 196How Big is My Device? 199PART 3: DETAILS, DETAILS 205CHAPTER 7: INTERACTING WITH THE USER 207A Simple Switch 208Dart’s const keyword 211Compatible or NOT? 213Wait For It! 214How Much Do You Love Flutter? 217Dealing with Text Fields 220Callouts 1 and 2 223Callout 3 225Callout 4 226Callout 5 230Creating Radio Buttons 230Creating an enum 233Building the radio group 233Displaying the user’s choice 235Creating a Dropdown Button 239Building the dropdown button 242The little Reset button 244Making a Map 245Onward and Upward 246CHAPTER 8: NAVIGATION, LISTS, AND OTHER GOODIES 247Extending a Dart Class 248From One Page to Another 251An icon on a button 254Pushing and popping 255Passing Data from Source to Destination 256Passing Data Back to the Source 261Dart’s async and await keywords 264Taking control of the app bar’s Back button 266Passing Data in Both Directions 267Creating Named Routes 272Creating a List 276The ListView widget 279Creating list items one-by-one 285Another new Dart language feature 288Fetching Data from the Internet 290Using a public API 293Sending a URL to a server 295Making sense of a JSON response 296What’s Next? 296CHAPTER 9: MOVING RIGHT ALONG 297Setting the Stage for Flutter Animation 297Moving Along a Straight Line 303Bouncing Around 308Animating Size and Color Changes 310Moving Along a Curve 312Dragging Things Around 314Where To Go From Here 319PART 4: THE PART OF TENS 321CHAPTER 10: TEN WAYS TO AVOID MISTAKES 323Put Capital Letters Where They Belong 323Use Parentheses When (and Only When) They’re Appropriate 323Limit Access to Variables 324Call setState 324Make Adjustments for Indices Starting at Zero 324Use the Expanded Widget 325Add itemCount to Your ListView.builder 325Add Imports When They’re Required 325Declare Assets and Dependencies in pubspec.yaml 325Indent Your Code According to Dart Language Guidelines 326CHAPTER 11: TEN WAYS TO ENHANCE YOUR APP DEVELOPMENT CAREER 327Practice! Practice! 327Critique Your Own Code 328Have Others Review Your Code 328Find Out Which Technologies Your Nearby Companies Use 328Attend User Group Meetings 328Ask Questions 329Ask Yourself Whether You Truly Understand 329Learn Things That You May Never Need to Know 329Do What You Love to Do 330Get Plenty of Sleep 330CHAPTER 12: TEN CHAPTERS ABOUT FLUTTER APP DEVELOPMENT 331Introduction 331What is Flutter? 331Setting Up Your Computer for Mobile App Development 332‘Hello’ from Flutter 332Hello Again 332Making Things Happen 332Laying Things Out 332Interacting with the User 332Navigation, Lists, and Other Goodies 333Moving Right Along 333PART 5: APPENDICES 335Appendix: Doris’s Dating App 337Index 347
Go - Das Praxisbuch
Ihr schneller Einstieg in Go.Sie haben schon Erfahrung mit objektorientierten Programmiersprachen und wollen sich jetzt Googles Programmiersprache Go genauer ansehen? Dann ist dieses Buch genau das Richtige für Sie! Denn Sie steigen direkt in die Besonderheiten von Go ein und lernen das Ökosystem rund um Tools und Testing kennen.Die Syntax der Programmiersprache und die Unterschiede zu gängigen objektorientierten Programmiersprachen wie Java oder C++ erläutert Andreas Schröpfer anhand von vielen Beispielen und zeigt Stolperfallen auf. Ein Fokus liegt auf dem Thema Nebenläufigkeit, für das Go so bekannt ist. Darüber hinaus beleuchtet der Autor das Ökosystem der Werkzeuge, die Go mitbringt. Für den Entwickleralltag wichtige Themen wie Codequalität und Code Conventions, Testing sowie Dokumentation ziehen sich quer durch das Praxisbuch.Das alles lernen sie nicht nur mit grauer Theorie, sondern direkt an der Tastatur mit Übungsaufgaben und Beispielprojekten. Alle Beispiele finden sich außerdem auf GitHub und sind so als Referenz für eigene Projekte jederzeit zugänglich. Dieses Gesamtpaket macht »Go – Das Praxisbuch« zu einem schnellen Start in eine schnelle Programmiersprache.Inhalt (PDF-Link)Leseprobe (PDF-Link)
Algorithmen in Python
Inhalt Algorithmen gehören zum Rüstzeug guter Entwickler und Programmierer. Dieses Buch stellt Ihnen eine Vielzahl an problemlösenden Techniken für den Programmieralltag vor und zeigt, wie Sie diese Techniken in Ihre Anwendungen implementieren. Dabei lernen Sie 32 Klassiker der Informatik kennen, vom einfachen Such-Algorithmus bis zu genetischen Algorithmen und neuronalen Netzen in der KI. Randvoll mit Codebeispielen in Python sowie Profitipps für Programmierer. Selbst wenn Ihnen einiges bekannt vorkommen wird, es warten zahlreiche Aha-Erlebnisse auf Sie. Ideal für alle, die ihre ersten Schritte in der Programmierung hinter sich haben und jetzt voll durchstarten wollen! - Programmieren trainieren mit bekannten und modernen Klassikern - Von der Suche bis zu k-Means, vom Dreizeiler bis zur dynamischen Programmierung und KI - Für Studium, Coding-Katas, Workouts oder in Eigeninitiative - Titel der amerikanischen Originalausgabe: "Classic Computer Science Problems in Python"
Hands-on Booting
Master the booting procedure of various operating systems with in-depth analysis of bootloaders and firmware. The primary focus is on the Linux booting procedure along with other popular operating systems such as Windows and Unix.Hands-on Booting begins by explaining what a bootloader is, starting with the Linux bootloader followed by bootloaders for Windows and Unix systems. Next, you’ll address the BIOS and UEFI firmware by installing multiple operating systems on one machine and booting them through the Linux bootloader. Further, you’ll see the kernel's role in the booting procedure of the operating system and the dependency between kernel, initramfs, and dracut. You’ll also cover systemd, examining its structure and how it mounts the user root filesystem. In the final section, the book explains troubleshooting methodologies such as debugging shells followed by live images and rescue mode.On completing this book, you will understand the booting process of major operating systems such as Linux, Windows, and Unix. You will also know how to fix the Linux booting issues through various boot modes.WHAT YOU WILL LEARN* Examine the BIOS and UEFI firmware * Understanding the Linux boot loader (GRUB)* Work with initramfs, dracut, and systemd* Fix can’t-boot issues on Linux WHO THIS BOOK IS FORLinux users, administrators, and developers.Yogesh has been with Red Hat for the past 10 years. He is presently working as a principal technical support engineer in the Linux kernel domain. He specializes in troubleshooting and tuning the performance issues of Linux enterprise servers. The Linux boot process is his forte and he regularly speaks at open source conferences and forums. He also conducts workshops on operating systems for engineering students.Chapter 1: IntroductionChapter Goal: Why should we learn booting? Why is it important?No of pages : 2Sub -Topics1. Why booting?2. What booting really is?3. What happens when you start your computer4. Supply goes to CPUChapter 2: Multi-BootChapter Goal: First stage of booting is firmware and boot loader. There are different firmware's and every OS vendor has their own boot loader. To make readers understand it better, in this chapter we will install different operating systems (windows, Linux, Unix etc.) on one machine and would boot them through Linux boot loader.No of pages: 75 pagesSub - Topics1. BIOS firmware2. Creating partition layout3. Installation sequence of different operating systems:a) Windows XPb) Solaris 2008c) PC-BSD 9.0d) Windows server 2k3e) Windows sevenf) Fedora 15g) Red Hat Enterprise Linux 74. Booting sequence of every operating system.5. Multi booting every operating system through Linux bootloader GRUB & through windows boot loaders (NTLDR / BCD)6. UEFI firmwarea. Why UEFI when we already have BIOS?b. Advantages of UEFI7. Creating GPT partition table8. Installation sequence of latest operating systems:a. Oracle Solaris 11b. Windows 10c. Fedora 31d. Red Hat Enterprise Linux 89. Booting sequence and flowchart of each and every OS.10. The 100 operating systems booting through one boot loader project.Chapter 3: GRUB BootloaderChapter Goal: This topic will cover the GRUB bootloader in much depth.No of pages : 40 pages.Sub - Topics:1.What is new in GRUB version 2? and why do we need it?2.GRUB 2’s structure on BIOS based system.3. GRUB 2’s structure on UEFI based system.4. Manual booting with GRUB 2.5. UEFI shell in detail.6. How to fix the corrupted GRUB.7. Some can’t boot scenarios (related to bootloader) and how to fix them.8. Secure Boot1. What is secure boot?2. Linux and secure boot?3. Shim bootloader of Ubuntu.4. How to add new keys to UEFI?5. How to sign kernel modules?Chapter 4: KernelChapter Goal: This chapter covers the kernel’s role in operating system’s booting sequence.No of pages: 15Sub - Topics:1. The kernel (vmlinuz) as an image file.2. Who and how vmlinuz file is extracted?3. Kernel will start the first process of Linux which is Systemd.Chapter 5: InitramfsChapter Goal: In order to understand the rest of booting sequence we need to understand the basics of initramfs, and why we need initramfs ?No of pages: 15Sub - Topics:1. Why Initramfs?2. Structure of Initramfs.3. How kernel extracts the initramfs in memory?4. How kernel mounts the initramfs as root?Chapter 6: DracutChapter Goal: Dracut is a tool which generates the initramfs. Initramfs is responsible for loading the appropriate modules which are necessary for successful booting.No of pages: Around 17Sub - Topics:1. How dracut makes initramfs image?2. How dracut choose modules to add in initramfs?3. How to customize the initramfs?4. Dracut command line options.5. How to blacklist or add modules in initramfs?Chapter 7: SystemdChapter Goal: The systemd process (first process of Linux) will be launched from initramfs. Once it launched its purpose is to mount the root filesystem and switch to it.No of pages: 55Sub - Topics:1. Structure of systemd.2. How does systemd reduces boot time?3. Booting flow of systemd inside initramfs.4. Plymouth5. Switching to new root filesystem.Chapter 8: Debugging ShellsChapter Goal: Systemd provide various shells to debug the cant boot issues. This topic will cover the booting flow to reach to these shells as well as how to use these shells to fix the cant boot issues.No of pages: 35Sub - Topics:1. Various dracut shells inside initramfs.2. Emergency shell.3. The default Rescue mode.4. Flowchart of so far booting sequence.Chapter 9: Live ImagesChapter Goal: The chapter will cover how does Live images of Operating System boots.No of pages: 4Sub-Topics:1. Filesystem used inside Live images.2. How does the live images boot.Chapter 10: Rescue ModeChapter Goal: Rescue mode plays a vital role in fixing the cant boot issues.No of pages: 15.
Practical R 4
Get started with an accelerated introduction to the R ecosystem, programming language, and tools including R script and RStudio. Utilizing many examples and projects, this book teaches you how to get data into R and how to work with that data using R. Once grounded in the fundamentals, the rest of Practical R 4 dives into specific projects and examples starting with running and analyzing a survey using R and LimeSurvey. Next, you'll carry out advanced statistical analysis using R and MouselabWeb. Then, you’ll see how R can work for you without statistics, including how R can be used to automate data formatting, manipulation, reporting, and custom functions.The final part of this book discusses using R on a server; you’ll build a script with R that can run an RStudio Server and monitor a report source for changes to alert the user when something has changed. This project includes both regular email alerting and push notification. And, finally, you’ll use R to create a customized daily rundown report of a person's most important information such as a weather report, daily calendar, to-do's and more. This demonstrates how to automate such a process so that every morning, the user navigates to the same web page and gets the updated report.WHAT YOU WILL LEARN* Set up and run an R script, including installation on a new machine and downloading and configuring R* Turn any machine into a powerful data analytics platform accessible from anywhere with RStudio Server* Write basic R scripts and modify existing scripts to suit your own needs* Create basic HTML reports in R, inserting information as needed* Build a basic R package and distribute itWHO THIS BOOK IS FORSome prior exposure to statistics, programming, and maybe SAS is recommended but not required.JON WESTFALL is an award-winning professor, published author, and practicing cognitive scientist. He teaches a variety of courses in psychology, from introduction to psychology to upper-level seminars. His current research focuses on the variables that influence economic and consumer finance decisions, and the retention of college students. With applications to both psychology and marketing, his work finds an intersection between basic and applied science. His current appointment is as an assistant professor of psychology, coordinator of the first year seminar program, and coordinator of the Okra Scholars program at Delta State University. Previously he was a visiting assistant professor at Centenary College of Louisiana, and the associate director for research and technology at the Center for Decision Sciences, a center within Columbia Business School at Columbia University in New York City. He now maintains a role with Columbia as a research affiliate and technology consultant.In addition to his research, Dr. Westfall also has career ties in information technology, where he has worked as a consultant since 1997, founding his own firm, Bug Jr. Systems. As a consultant he has developed custom software solutions (including native Windows 32 applications, Windows .NET applications, Windows Phone 7 and Android mobile applications, as well as ASP, ASP.NET, and PHP web applications). He has also served as a senior network and systems architect and administrator (on both Windows and Unix networks, and hybrids) and has also been recognized as a Microsoft Most Valuable Professional (MVP) 2008 – 2012. He has authored several books, and presented at academic as well as technology conferences and gatherings.Chapter 1: Getting Up and Running with RChapter 2: Getting Data into RChapter 3: Project 1: Launching, Analyzing, and Reporting a Survey using R and LimeSurveyChapter 4: Project 2: Advanced Statistical Analysis using R and Mouselab WebChapter 5: R in Everyday LifeChapter 6: Project 3: The R Form MailerChapter 7: Project 4: The R Powered PresentationChapter 8: R AnywhereChapter 9: Project 5: The Change Alert!Chapter 10: Project 6: The R Personal AssistantDETAILED VIEW BELOWChapter 1: Getting Up and Running with RChapter Goal:• Explain what R is, and what R isn’t• Explain the R landscape – it’s open source nature and the various ways people use it.• Explain how R is installed, what types of systems it runs on, and how the user interacts with it.• Explain the basic R script, running basic commands in R (e.g., a “Hello World”) and basic computations.Chapter 2: Feed the Beast: Getting Data into R• Explain the different types of data that R can work with, and how that data is stored.• Explain the basics of connecting R to flat files, database files, database servers, and published data on the internet.• Give examples for downloading data directly from Google Sheets, websites, and more directly from R.• Give examples of basic data scraping with R.• Explain writing of data objects to native RData format as well as other formats for interchangeable use.Chapter 3: Recipe 1: Launching, Analyzing, and Reporting a Survey using R and LimeSurvey• Explain a real-world scenario: A survey project applicable to market research.• Discuss an open-source tool, LimeSurvey, that can be used to create a survey, collect responses, and download those responses into R.• Bring the data into R and run basic summary statistics on the data.• Take those analyses farther into inferential statistics (Linear Regression).Chapter 4: Recipe 2: Advanced Statistical Analysis using R and Mouselab Web• A deeper data scenario than Chapter 3 discussing how Mouselab Web (an open source tool) can be used to track how people view products and services and make decisions.• Introduces advanced statistical design using Linear Mixed-methods regressions.• Also introduces the idea of R packages, and the perils of using packages (e.g., concerns over future-proofing). This chapter is a very deep concept that will be presented accessibly, so that readers learn the takeaways regarding how R works and how to futureproof your R projects, but also get a bit of a unique project applicable to psychology and market research.Chapter 5: R in Everyday Life• Perhaps you’re not a statistician, you just want R to be useful to you in your job. This chapter discusses how R can be used to automate…o Data formattingo Data manipulationo Data reporting• This chapter also talks about how users can write custom functions in R to speed up their workflows.• Finally this chapter talks about how to export results from R into common desktop software such as Microsoft Office.Chapter 6: Recipe 3: The R Form Mailer• Mail Merge is a great tool in Microsoft Office, but it’s entirely graphically driven – point and click, drag and drop. What if you could script it?• This recipe discusses scripting a Mail Merge type activity – sending custom emails with report information directly from R through an email server.• Along the way we learn a bit more about data manipulation by taking long format data (sales figures) and calculating salesmen commissions, then providing a report to each salesperson in their email.Chapter 7: Recipe 4: The R Powered Presentation• Discusses a real-world scenario where a presentation must be given that includes real-time data collection.• Participants during the presentation can take a quick survey (Using Google Forms), which will then be analyzed during the presentation and reported by the speaker.• Discusses how R can create and export results nearly instantly, right on a speaker’s laptop during the presentation.Chapter 8: R Anywhere• Final part of the book discusses using R on a server for always-on analytics, using open source software (RStudio Server).• The computing requirements for such a system, and how one sets it up either on a spare machine or on a dedicated Virtual Private Server.• Potential uses for such a setup, from analysis from devices that don’t support R (e.g., an iPad), or analysis for long-running tasks.Chapter 9: Recipe 5: The Change Alert!• Often work life requires one to check reports or other items to see if something has changed – perhaps a new person has been added to a team, or a new student added to a class.• This recipe demonstrates how to build a script with R that can run on an RStudio Server and monitor a report source for changes, and alert the user when something has changed.• This recipe demonstrates not only regular email alerting, but also push notification alerting through the service Pushover, an ultra low-cost ($4.99, one time) option for customized push notifications.Chapter 10: Recipe 6: The R Personal Assistant• Demonstrates how to use R to create a customized daily rundown report of a person’s most important information, such as the weather report, daily calendar, to-dos, and more.• Demonstrates how to automate such a process so that every morning the user navigates to the same webpage and gets the updated report.• Demonstrates how to build a simple skill in Amazon Alexa that will read the report daily as the user’s command.
OCP Oracle Certified Professional Java SE 11 Programmer II Study Guide
THIS OCP ORACLE CERTIFIED PROFESSIONAL JAVA SE 11 PROGRAMMER I STUDY GUIDE: EXAM 1Z0-815 AND THE PROGRAMMER II STUDY GUIDE: EXAM 1Z0-816 WERE PUBLISHED BEFORE ORACLE ANNOUNCED MAJOR CHANGES TO ITS OCP CERTIFICATION PROGRAM AND THE RELEASE OF THE NEW DEVELOPER 1Z0-819 EXAM.NO MATTER THE CHANGES, REST ASSURED BOTH OF THE PROGRAMMER I AND II STUDY GUIDES COVER EVERYTHING YOU NEED TO PREPARE FOR AND TAKE EXAM 1Z0-819. IF YOU’VE PURCHASED ONE OF THE PROGRAMMER STUDY GUIDES, PURCHASE THE OTHER ONE AND YOU’LL BE ALL SET.NOTE: The OCP Java SE 11 Programmer I Exam 1Z0-815 and Programmer II Exam 1Z0-816 have been retired (as of October 1, 2020), and Oracle has released a new Developer Exam 1Z0-819 to replace the previous exams. The Upgrade Exam 1Z0-817 remains the same.THE COMPLETELY-UPDATED PREPARATION GUIDE FOR THE NEW OCP ORACLE CERTIFIED PROFESSIONAL JAVA SE 11 PROGRAMMER II EXAM—COVERS EXAM 1Z0-816Java, a platform-independent, object-oriented programming language, is used primarily in mobile and desktop application development. It is a popular language for client-side cloud applications and the principal language used to develop Android applications. Oracle has recently updated its Java Programmer certification tracks for Oracle Certified Professional.OCP Oracle Certified Professional Java SE 11 Programmer II Study Guide ensures that you are fully prepared for this difficult certification exam. Covering 100% of exam objectives, this in-depth study guide provides comprehensive coverage of the functional-programming knowledge necessary to succeed. Every exam topic is thoroughly and completely covered including exceptions and assertions, class design, generics and collections, threads, concurrency, IO and NIO, and more. Access to Sybex's superior online interactive learning environment and test bank—including self-assessment tests, chapter tests, bonus practice exam questions, electronic flashcards, and a searchable glossary of important terms—provides everything you need to be fully prepared on exam day. This must-have guide:* Covers all exam objectives such as inheriting abstract classes and interfaces, advanced strings and localization, JDBC, and Object-Oriented design principles and patterns* Explains complex material and reinforces your comprehension and retention of important topics* Helps you master more advanced areas of functional programming* Demonstrates practical methods for building Java solutionsOCP Oracle Certified Professional Java SE 11 Programmer II Study Guide will prove invaluable for anyone seeking achievement of this challenging exam, as well as junior- to senior-level programmers who uses Java as their primary programming language.SCOTT SELIKOFF, OCA/OCP 8 AND OCP 11, has been a professional Java Enterprise architect for over 20 years. He is the founder of Selikoff Solutions, LLC, specializing in building custom mobile and server solutions for businesses in the tri-state New York City area. JEANNE BOYARSKY, OCA/OCP 8 AND OCP 11, is a Java Champion and has worked as a Java developer for a major bank for more than 18 years. She is a senior moderator at CodeRanch, and trains and mentors students of all levels, including the programming division of a FIRST robotics team.Introduction xxiAssessment Test xlivCHAPTER 1 JAVA FUNDAMENTALS 1Applying the final Modifier 2Declaring final Local Variables 3Adding final to Instance and static Variables 4Writing final Methods 5Marking Classes final 5Working with Enums 6Creating Simple Enums 6Using Enums in Switch Statements 8Adding Constructors, Fields, and Methods 9Creating Nested Classes 12Declaring an Inner Class 12Creating a static Nested Class 15Writing a Local Class 17Defining an Anonymous Class 18Reviewing Nested Classes 21Understanding Interface Members 22Relying on a default Interface Method 23Using static Interface Methods 27Introducing private Interface Methods 28Introducing private static Interface Methods 29Reviewing Interface Members 31Introducing Functional Programming 32Defining a Functional Interface 32Declaring a Functional Interface with Object Methods 34Implementing Functional Interfaces with Lambdas 36Writing Lambda Expressions 38Working with Lambda Variables 40Summary 43Exam Essentials 44Review Questions 46CHAPTER 2 ANNOTATIONS 59Introducing Annotations 60Understanding Metadata 60Purpose of Annotations 61Creating Custom Annotations 64Creating an Annotation 64Specifying a Required Element 65Providing an Optional Element 66Selecting an Element Type 67Applying Element Modifiers 67Adding a Constant Variable 68Reviewing Annotation Rules 68Applying Annotations 69Using Annotations in Declarations 69Mixing Required and Optional Elements 71Creating a value() Element 71Passing an Array of Values 73Declaring Annotation-Specific Annotations 74Limiting Usage with @Target 74Storing Annotations with @Retention 77Generating Javadoc with @Documented 77Inheriting Annotations with @Inherited 79Supporting Duplicates with @Repeatable 79Reviewing Annotation-Specific Annotations 81Using Common Annotations 83Marking Methods with @Override 83Declaring Interfaces with @FunctionalInterface 84Retiring Code with @Deprecated 85Ignoring Warnings with @SuppressWarnings 86Protecting Arguments with @SafeVarargs 88Reviewing Common Annotations 89Summary 91Exam Essentials 92Review Questions 94CHAPTER 3 GENERICS AND COLLECTIONS 105Using Method References 107Calling Static Methods 108Calling Instance Methods on a Particular Object 109Calling Instance Methods on a Parameter 109Calling Constructors 110Reviewing Method References 110Using Wrapper Classes 111Using the Diamond Operator 113Using Lists, Sets, Maps, and Queues 114Common Collections Methods 115Using the List Interface 119Using the Set Interface 124Using the Queue Interface 126Using the Map Interface 128Comparing Collection Types 135Sorting Data 137Creating a Comparable Class 137Comparing Data with a Comparator 141Comparing Comparable and Comparator 142Comparing Multiple Fields 143Sorting and Searching 145Working with Generics 147Generic Classes 148Generic Interfaces 151Raw Types 152Generic Methods 153Bounding Generic Types 154Putting It All Together 159Summary 161Exam Essentials 163Review Questions 164CHAPTER 4 FUNCTIONAL PROGRAMMING 175Working with Built-in Functional Interfaces 176Implementing Supplier 178Implementing Consumer and BiConsumer 179Implementing Predicate and BiPredicate 180Implementing Function and BiFunction 181Implementing UnaryOperator and BinaryOperator 183Checking Functional Interfaces 184Convenience Methods on Functional Interfaces 185Returning an Optional 187Creating an Optional 188Dealing with an Empty Optional 189Using Streams 191Understanding the Pipeline Flow 191Creating Stream Sources 194Using Common Terminal Operations 197Using Common Intermediate Operations 204Putting Together the Pipeline 209Working with Primitive Streams 213Creating Primitive Streams 214Mapping Streams 217Using Optional l with Primitive Streams 219Summarizing Statistics 220Learning the Functional Interfaces for Primitives 221Working with Advanced Stream Pipeline Concepts 224Linking Streams to the Underlying Data 224Chaining Optionals 224Collecting Results 227Summary 234Exam Essentials 236Review Questions 238CHAPTER 5 EXCEPTIONS, ASSERTIONS, AND LOCALIZATION 247Reviewing Exceptions 248Handling Exceptions 248Distinguishing between throw and throws 250Examining Exception Categories 250Inheriting Exception Classes 252Creating Custom Exceptions 253Declaring Exception Classes 253Adding Custom Constructors 253Printing Stack Traces 255Automating Resource Management 256Constructing Try-With-Resources Statements 256Learning the New Effectively Final Feature 259Understanding Suppressed Exceptions 261Declaring Assertions 264Validating Data with the assert Statement 264Enabling Assertions 266Disabling Assertions 267Applying Assertions 267Writing Assertions Correctly 268Working with Dates and Times 268Creating Dates and Times 269Formatting Dates and Times 271Supporting Internationalization and Localization 276Picking a Locale 276Localizing Numbers 279Localizing Dates 283Specifying a Locale Category 284Loading Properties with Resource Bundles 285Creating a Resource Bundle 286Picking a Resource Bundle 288Selecting Resource Bundle Values 289Formatting Messages 291Using the Properties Class 292Summary 293Exam Essentials 294Review Questions 295CHAPTER 6 MODULAR APPLICATIONS 309Reviewing Module Directives 310Comparing Types of Modules 311Named Modules 311Automatic Modules 312Unnamed Modules 315Comparing Module Types 315Analyzing JDK Dependencies 316Identifying Built-in Modules 316Using jdeps 318Migrating an Application 321Determining the Order 321Exploring a Bottom-Up Migration Strategy 322Exploring a Top-Down Migration Strategy 324Splitting a Big Project into Modules 325Failing to Compile with a Cyclic Dependency 326Creating a Service 328Declaring the Service Provider Interface 329Creating a Service Locator 330Invoking from a Consumer 332Adding a Service Provider 333Merging Service Locator and Consumer 334Reviewing Services 337Summary 337Exam Essentials 338Review Questions 339CHAPTER 7 CONCURRENCY 345Introducing Threads 347Distinguishing Thread Types 348Understanding Thread Concurrency 348Defining a Task with Runnable 349Creating a Thread 351Polling with Sleep 353Creating Threads with the Concurrency API 355Introducing the Single-Thread Executor 355Shutting Down a Thread Executor 356Submitting Tasks 357Waiting for Results 358Submitting Task Collections 362Scheduling Tasks 363Increasing Concurrency with Pools 366Writing Thread-Safe Code 367Understanding Thread-Safety 367Protecting Data with Atomic Classes 369Improving Access with Synchronized Blocks 371Synchronizing on Methods 373Understanding the Lock Framework 375Orchestrating Tasks with a CyclicBarrier 379Using Concurrent Collections 382Understanding Memory Consistency Errors 383Working with Concurrent Classes 383Obtaining Synchronized Collections 388Identifying Threading Problems 389Understanding Liveness 390Managing Race Conditions 393Working with Parallel Streams 394Creating Parallel Streams 395Performing a Parallel Decomposition 396Processing Parallel Reductions 398Avoiding Stateful Operations 403Summary 404Exam Essentials 405Review Questions 406CHAPTER 8 I/O 419Understanding Files and Directories 420Conceptualizing the File System 420Storing Data as Bytes 422Introducing the File Class 422Introducing I/O Streams 426Understanding I/O Stream Fundamentals 426Learning I/O Stream Nomenclature 427Common I/O Stream Operations 433Reading and Writing Data 433Closing the Stream 435Manipulating Input Streams 436Flushing Output Streams 438Reviewing Common I/O Stream Methods 439Working with I/O Stream Classes 440Reading and Writing Binary Data 440Buffering Binary Data 441Reading and Writing Character Data 443Buffering Character Data 444Serializing Data 445Printing Data 452Review of Stream Classes 457Interacting with Users 458Printing Data to the User 459Reading Input as a Stream 460Closing System Streams 460Acquiring Input with Console 461Summary 464Exam Essentials 464Review Questions 466CHAPTER 9 NIO.2 475Introducing NIO.2 476Introducing Path 477Creating Paths 478Understanding Common NIO.2 Features 483Interacting with Paths 486Viewing the Path with toString(), getNameCount(), and getName() 486Creating a New Path with subpath() 487Accessing Path Elements with getFileName(), getParent(), and getRoot() 488Checking Path Type with isAbsolute() and toAbsolutePath() 490Joining Paths with resolve() 491Deriving a Path with relativize() 491Cleaning Up a Path with normalize() 493Retrieving the File System Path with toRealPath() 493Reviewing Path Methods 494Operating on Files and Directories 495Checking for Existence with exists() 495Testing Uniqueness with isSameFile() 496Making Directories with createDirectory() and createDirectories() 497Copying Files with copy() 498Moving or Renaming Paths with move() 500Deleting a File with delete() and deleteIfExists() 500Reading and Writing Data with newBufferedReader() and newBufferedWriter() 501Reading a File with readAllLines() 502Reviewing Files Methods 502Managing File Attributes 503Discovering File Attributes 503Improving Attribute Access 506Applying Functional Programming 508Listing Directory Contents 508Traversing a Directory Tree 510Searching a Directory with find() 514Reading a File with lines() 515Comparing Legacy java.io.File and NIO.2 Methods 517Summary 518Exam Essentials 518Review Questions 520CHAPTER 10 JDBC 529Introducing Relational Databases and SQL 530Identifying the Structure of a Relational Database 532Writing Basic SQL Statements 533Introducing the Interfaces of JDBC 535Connecting to a Database 537Building a JDBC URL 537Getting a Database Connection 539Working with a PreparedStatement 542Obtaining a PreparedStatement 543Executing a PreparedStatement 543Working with Parameters 546Updating Multiple Times 549Getting Data from a ResultSet 551Reading a ResultSet 551Getting Data for a Column 555Using Bind Variables 556Calling a CallableStatement 557Calling a Procedure without Parameters 558Passing an IN Parameter 559Returning an OUT Parameter 559Working with an INOUT Parameter 560Comparing Callable Statement Parameters 560Closing Database Resources 561Summary 564Exam Essentials 564Review Questions 566CHAPTER 11 SECURITY 575Designing a Secure Object 576Limiting Accessibility 576Restricting Extensibility 577Creating Immutable Objects 578Cloning Objects 581Introducing Injection and Input Validation 583Preventing Injection with a PreparedStatement 583Invalidating Invalid Input with Validation 586Working with Confidential Information 588Guarding Sensitive Data from Output 589Protecting Data in Memory 589Limiting File Access 590Serializing and Deserializing Objects 591Specifying Which Fields to Serialize 591Customizing the Serialization Process 592Pre/Post-Serialization Processing 593Reviewing Serialization Methods 596Constructing Sensitive Objects 597Making Methods final 598Making Classes final 598Making the Constructor private 599Preventing Denial of Service Attacks 600Leaking Resources 600Reading Very Large Resources 600Including Potentially Large Resources 601Overflowing Numbers 601Wasting Data Structures 602Summary 603Exam Essentials 604Review Questions 605APPENDICES 611APPENDIX A THE UPGRADE EXAM 611Working with Local Variable Type Inference 612Type Inference of var 613Examples with var 614Review of var Rules 617Introducing Modules 617Exploring a Module 618Benefits of Modules 619Creating and Running a Modular Program 621Creating the Files 622Compiling Our First Module 623Running Our First Module 625Packaging Our First Module 627Updating Our Example for Multiple Modules 628Updating the Feeding Module 628Creating a Care Module 629Creating the Talks Module 631Creating the Staff Module 634Diving into the module-info File 635exports 635requires transitive 636provides, uses, and opens 639Discovering Modules 639The java Command 639The jar Command 643The jdeps Command 643The jmod Command 645Reviewing Command-Line Options 645Summary 648Exam Essentials 649Review Questions 650APPENDIX B ANSWERS TO REVIEW QUESTIONS 657Chapter 1: Java Fundamentals 658Chapter 2: Annotations 662Chapter 3: Generics and Collections 665Chapter 4: Functional Programming 669Chapter 5: Exceptions, Assertions, and Localization 672Chapter 6: Modular Applications 676Chapter 7: Concurrency 678Chapter 8: I/O 682Chapter 9: NIO.2 685Chapter 10: JDBC 689Chapter 11: Security 691Appendix A: The Upgrade Exam 693Index 697
Getting Started with Advanced C#
Understand and work with the most important features of advanced C# in different programming environments. This book teaches you the fundamental features of advanced C# and how to incorporate them in different programming techniques using Visual Studio 2019.The book is divided into two parts. Part I covers the fundamentals and essentials of advanced programming in C#. You will be introduced to delegates and events and then move on to lambda expressions. Part II teaches you how to implement these features in different programming techniques, starting with generic programming. After that, you will learn about thread programming and asynchronous programming, to benefit from a multi-threaded environment. Finally, you will learn database programming using ADO.NET to connect to a MySQL database and you will know how to exercise SQL statements and stored procedures through your C# applications.WHAT YOU WILL LEARN* Use delegates, events, and lambda expressions in advanced programming* Make your application flexible by utilizing generics* Create a fast application with multi-threading and asynchronous programming* Work in Visual Studio Community Edition, which is the most common IDE for using C#* Understand alternative implementations along with their pros and consWho This Book Is ForDevelopers and programmers who are already working in C#VASKARAN SARCAR obtained his Master of Engineering in software engineering from Jadavpur University, Kolkata (India) and an MCA from Vidyasagar University, Midnapore (India). He was a National Gate Scholar (2007-2009) and has more than 12 years of experience in education and the IT industry. Vaskaran devoted his early years (2005-2007) to teaching at various engineering colleges and later he joined HP India PPS R&D Hub Bangalore and worked there until August, 2019. At the time of his retirement from the IT industry, he was a senior software engineer and a team lead at HP. To follow his dream and passion, Vaskaran is now a full-time author. Other Apress books by Vaskaran include: Interactive Object-Oriented Programming in Java (second edition), Java Design Patterns (second edition), Design Patterns in C#, Interactive C#, Interactive Object-Oriented Programming in Java, and Java Design Patterns.INTRODUCTIONPART-ICHAPTER 1: DELEGATESSubtopics:· What is a delegate?· How to create and use delegates?· What is a multicast delegate (Chaining of Delegates) and its uses?· Adding and removing methods from a multicast delegate.· Covariance and contravariance in non-generic delegates.CHAPTER 2: EVENTSSubtopics:· Events overview* Creation of events and example of simple events* Subscribing single and multiple events* Passing data to events* Discussion on event accessorsCHAPTER 3: ANONYMOUS FUNCTION AND LAMBDA EXP.Subtopics:· A quick introduction to anonymous function and lambda expression.* Lambda’s with and without parameters* Types and scopes of a lambda expressionExpression syntaxes with exampleCHAPTER 4: LINQSubtopics:* LINQ overview* Different case studies with simple and complicated query expressions* Retrieving customized data from a query expression* Comparing a method call syntax and a query syntax. PART-IICHAPTER 5: GENERIC PROGRAMMINGSubtopics:* Generics overviewComparing a generic program with its counterpart-a non-generic program * Self-referenced generics* Use of ‘default’ in a generic programHow to put constraints in a generic program * Covariance and contravariance in the context of a generic programCHAPTER 6: DATABASE PROGRAMMINGSubtopics:· How to connect to a database· Exercise simple queries to database and retrieving results from the database.CHAPTER 7: THREAD PROGRAMMINGSubtopics:Threads overview * Different case studies with multithreaded programs* Use of ParameterizedThreadStart delegate in a multithreaded environment * Passing multiple parameters to a thread* Discussion on Synchronization and deadlock with examplesCHAPTER 8: ASYNCHRONOUS PROGRAMMINGSubtopics:Brief overview * Different techniques to implement an asynchronous program(e.g. using async/await, thread, thread pool etc)CHAPTER 9: DYNAMIC PROGRAMMINGSubtopics:* DLR overview* Dynamic type and its uses* Dynamic type checking* Runtime look up etc.
Homeoffice und mobiles Arbeiten im Team effektiv umsetzen
Produktives Arbeiten im Homeoffice erfordert neben richtiger Ausstattung, guter Sprach- und Datenkommunikation und Zugriff auf Daten auch die – durch IT-Tools unterstützten – passenden Führungs- und Arbeitsmethoden. Dieser Ratgeber bietet konkrete Anleitungen, um ohne IT-Fachkenntnisse das weltweite Arbeiten im Team schnell und pragmatisch möglich zu machen.Peter Bruhn ist Diplom-Wirtschaftsinformatiker (TU Darmstadt) und zweifacher Master of Science (Computer Science, University of Illinois (USA) und Informationswissenschaft, Hochschule Darmstadt). Bereits 2000 spezialisierte er sich als Berater bei McKinsey & Company auf die Digitale Transformation. Anschließend baute er als Senior Manager im Innovationsbereich der Deutschen Telekom AG neue Geschäftsmodelle u.a. für die Digital Business Unit auf. Als Vice President Group Digital Transformation übernahm Bruhn 2016 die Verantwortung für die Digitale Agenda der TAKKT AG in Europa und den USA.Peter Bruhn ist ein Vorreiter für mobiles Arbeiten und hat als Führungskraft jahrelange Erfahrung in der Führung verteilter Teams auf Distanz. Einleitung.- Hardware.- Konnektivität.- Software.- Anwendungen für die Team-Zusammenarbeit.- IT-Sicherheit und Datenschutz.- Fazit und Empfehlung
Agile Artificial Intelligence in Pharo
Cover classical algorithms commonly used as artificial intelligence techniques and program agile artificial intelligence applications using Pharo. This book takes a practical approach by presenting the implementation details to illustrate the numerous concepts it explains.Along the way, you’ll learn neural net fundamentals to set you up for practical examples such as the traveling salesman problem and cover genetic algorithms including a fun zoomorphic creature example. Furthermore, Practical Agile AI with Pharo finishes with a data classification application and two game applications including a Pong-like game and a Flappy Bird-like game. This book is informative and fun, giving you source code to play along with. You’ll be able to take this source code and apply it to your own projects.WHAT YOU WILL LEARN* Use neurons, neural networks, learning theory, and more* Work with genetic algorithms * Incorporate neural network principles when working towards neuroevolution * Include neural network fundamentals when building three Pharo-based applicationsWHO THIS BOOK IS FORCoders and data scientists who are experienced programmers and have at least some prior experience with AI or deep learning. They may be new to Pharo programming, but some prior experience with it would be helpful.ALEXANDRE BERGEL, PH.D., is an associate professor in the Department of Computer Science (DCC) at the University of Chile and is a member of the Intelligent Software Construction laboratory (ISCLab). His research interests include software engineering, software performance, software visualization, programming environment, and machine learning. He is interested in improving the way we build and maintain software. His current hypotheses are validated using rigorous empirical methodologies. To make his research artifacts useful not only to stack papers, he co-founded Object Profile.1: Introduction2: The Perceptron Model3: Artificial Neuron4: Neural Networks5: Theory on Learning6: Data Classification7: A Matrix Library8: Matrix-Based Neural Network9: Genetic Algorithm10: Genetic Algorithm in Action11: Traveling Salesman Problem12: Exiting a Maze13: Building Zoomorphic Creatures14: Evolving Zoomorphic Creature15: Neuroevolution16: Neuroevolution with NEAT17: The MiniMario Video GameLast Words (Afterword)
45 Elektronik-Projekte für den Raspberry Pi
Der Raspberry Pi stellt einen sehr preiswerten, aber doch vollwertigen Computer dar, an den auf einfache Weise verschiedenste Elektronik angeschlossen werden kann. Dieses Buch geht auf eine der Stärken des Raspberry Pi ein: die Kombination von Elektronik und Software.Nach einer kurzen Einführung zum Raspberry Pi wird auf die benötigte Software eingegangen. Im Anschluss wird das Linux-Betriebssystem kurz vorgestellt – gefolgt von einer Einführung in die Programmierung mit Bash, Python und JavaScript. Der Schwerpunkt liegt dabei auf Python. Die Erläuterungen sind in allen Fällen kurz und bündig und trotzdem so ausführlich, dass das Notwendigste besprochen wird, um die folgenden Projekte zu verstehen und individuell anzupassen.Dieses Buch beschreibt 45 spannende und interessante Projekte, wie zum Beispiel ein Wechselblinklicht, eine Motorregelung, Erzeugen und Verarbeiten analoger Signale, ein digitales Thermometer, ein Lichtmesser. Aber auch kompliziertere Projekte wie eine Motor-Geschwindigkeitsregelung, ein Webserver mit CGI (Common Gateway Interface) und Client-Server-Programme werden vorgestellt. Sie können dieses Buch als Projektbuch verwenden und die Projekte nachbauen, um sie dann in der Praxis einzusetzen. Durch die ausführliche Beschreibung mit Schaltplänen und Fotos gestaltet sich der Aufbau auf dem Steckbrett recht einfach.Sie können dieses Buch auch als Lehrbuch verwenden. Bei jedem Projekt wird erklärt, warum es auf diese Art und Weise ausgeführt ist. Sie lernen viel über den Raspberry Pi, Python und die verwendeten Bauteile, so dass Sie selbst die Projekte anpassen, nach eigenen Wünschen erweitern oder mehrere Projekte miteinander kombinieren können.Um Ihnen die Software-Installation zu erleichtern, hat der Autor das Betriebssystem und alle Programmbeispiele auf einer SD-Karte zusammengetragen. Passend zu den Projekten ist neben dieser SD-Karte auch ein Hardware-Starterkit bei Elektor erhältlich.Bert van Dam ist freiberuflicher Autor von Büchern, Kursen und Artikeln über PIC- und ARM Mikrocontroller, Arduino, Raspberry Pi, PCs, Künstliche Intelligenz und die Programmiersprachen JAL, C, Assembler, Python und Flowcode.
Programming with Node-RED
The Internet of Things (IoT) is becoming a major application area for embedded systems. As a result, more and more people are becoming interested in learning about embedded design and programming. Technical colleges and universities are moving away from legacy 8 and 16-bit microcontrollers and are introducing 32-bit embedded microcontrollers to their curriculums. Many IoT applications demand precision, high processing power, and low power consumption.Produced by IBM, Node-RED is an open-source visual editor for wiring the Internet of Things. Node-RED comes with a large number of nodes to handle a multitude of tasks. The required nodes are selected and joined together to perform a particular task. Node-RED is based on flow type programming where nodes are configured and joined together to form an application program. There are nodes for performing complex tasks, including web access, Twitter, E-mail, HTTP, Bluetooth, MQTT, controlling GPIO ports, etc. One particularly nice aspect of Node-RED is that the programmer does not need to learn how to write complex programs. For example, an email can be sent by simply joining nodes together and writing only a few lines of code.The aim of this book is to teach how Node-RED can be used in projects. The main hardware platform used with most of the projects in this book is Raspberry Pi 4. Chapters are included to show how Node-RED can be also be used with Arduino Uno, ESP32 DevKitC, and the ESP8266 NodeMCU microcontroller development boards.Prof. Dr. Dogan Ibrahim is a Fellow of the Institution of Electrical Engineers. He is the author of over 60 technical books, published by publishers including Wiley, Butterworth, and Newnes. He is the author of over 250 technical papers, published in journals, and presented in seminars and conferences.
C Programming with Arduino
Technology is constantly changing. New microcontrollers become available every year. The one thing that has stayed the same is the C programming language used to program these microcontrollers. If you would like to learn this standard language to program microcontrollers, then this e-book (pdf) is for you!Arduino is the hardware platform used to teach the C programming language as Arduino boards are available worldwide and contain the popular AVR microcontrollers from Atmel.Atmel Studio is used as the development environment for writing C programs for AVR microcontrollers. It is a full-featured integrated development environment (IDE) that uses the GCC C software tools for AVR microcontrollers and is free to download.At a glance:• Start learning to program from the very first chapter• No programming experience is necessary• Learn by doing - type and run the example programs• A fun way to learn the C programming language• Ideal for electronic hobbyists, students and engineers wanting to learn the C programming language in an embedded environment on AVR microcontrollers• Use the free full-featured Atmel Studio IDE software for Windows• Write C programs for 8-bit AVR microcontrollers as found on the Arduino Uno and MEGA boards• Example code runs on Arduino Uno and Arduino MEGA 2560 boards and can be adapted to run on other AVR microcontrollers or boards• Use the AVR Dragon programmer / debugger in conjunction with Atmel Studio to debug C programsWarwick A. Smith lives in South Africa and works as an Electronics Engineer and Embedded System Programmer. He is a bestselling author of the books C Programming for Embedded Microcontrollers, ARM Microcontroller Interfacing and Open Source Electronics on Linux.
Django Standalone Apps
Develop standalone Django apps to serve as the reusable building blocks for larger Django projects. This book explores best practices for publishing these apps, with special considerations for testing Django apps, and strategies for extracting existing functionality into a separate package.This jumpstart reference is divided into four distinct and sequential sections, all containing short, engaging chapters that can be read in a modular fashion, depending on your level of experience. The first section covers the structure and scope of standalone Django apps. The second section digs into questions about pulling code out of existing projects and into new standalone apps for reuse. The third section details additional, advanced technical best practices toward making standalone apps as broadly useful as possible. The fourth and final section covers strategies for managing a published Django app.Django Standalone Apps is the perfect resource for developers who have at least some prior experience working with Django web applications and want to simplify their deployments and share their knowledge as open source packages.WHAT YOU'LL LEARN* Scope a standalone Django app project for optimum usefulness* Extract code from existing projects to reuse* Test a standalone app outside of your Django project* Reuse your own code for increased delivery cadence and code quality* Review best practices for maintaining a Django app packageWHO THIS BOOK IS FORProfessional developers who work with Django. Deep expertise is not required or expected, but readers should have working familiarity with Django.Ben is cofounder of a web development consultancy and has been working professionally with Django for almost a decade. He has architected and led development on Django-based web applications including, custom content management systems, media platforms, and multi tenant back office solutions.He lives in the Rochester, NY, area, and graduated from the University of Virginia with a degree in Economics. Previously he managed the data and analytics services for a market research firm and was an IT strategy consultant for a global management consulting firm. His own standalone apps include Django Organizations, a long term project for managing multi user accounts in Django projects.Chapter 1: Defining the Scope of a Django Standalone AppChapter 2: Structuring Django Standalone AppsChapter 3: TestingChapter 4: Model MigrationsChapter 5: TemplatesChapter 6: Using Static FilesChapter 7: Namespacing in Your AppChapter 8: Creating a Basic PackageChapter 9: Scooping and Drawing BoundariesChapter 10: Separating Your AppChapter 11: Adding Your App Back InChapter 12: Handling App SettingsChapter 13: InternationalizationChapter 14: Managing Version CompatibilityChapter 15: Mixed Dependency SupportChapter 16: ModularityChapter 17: Better PackagingChapter: 18: LicensingChapter: 19: Documenting Your Standalone AppChapter 20: Additional TestingChapter 21: AutomatingChapter 22: Databases and other backend specific considerationsChapter 23: CollaboratingChapter 24: Using App Templates
Game Design und Produktion
Dieses Grundlagenlehrbuch für angehende Computerspieldesigner erläutert zunächst die allgemeinen Zusammenhänge des menschlichen Spielens. Dabei kommt es dem Autor auch darauf an, die Übergänge zu den neuen vernetzten Medien und den Gemeinschaften in den sogenannten virtuellen Räumen zu betrachten.Im weiteren Verlauf wird der Stand der Technik bezüglich der Produktion von Computerspielen beschrieben, wobei auf die Spielentwicklung (Game Design) ebenso eingegangen wird wie auf die Programmierung, Funktionsweisen und Jobprofile der Spieleindustrie. Hier liegt der Schwerpunkt auf allgemeinen Prinzipien, da die Computertechnologie einem sehr schnellen Wandel unterliegt.Das Buch verweist in Kästen und Anmerkungen auf einschlägige Literatur, Spiele und andere Medien und soll so zur Vertiefung des Gebiets anregen. Zudem gibt das Buch einen Überblick über Spielformen von Online- und Offline-Spielen und klärt Kernbegriffe des Aufbaus von Computerspielen. Anschaulich geschrieben, vermittelt dieses Lehrbuch wichtige Grundlagen des Designs und der Entwicklung von Computerspielen vor dem Hintergrund moderner spieltheoretischer Grundlagen.In der zweiten Auflage: Aktualisierung der Beispiele, neue Engines (Kapitel über die Unreal Engine), Technik, Technologie, Skills. Prof. Gunther Rehfeld lehrt am Department Medientechnik der HAW Hamburg und forscht zu Online-Computerspielen, Dramaturgie und aktivierenden Spielformaten.
Thinking in Pandas
Understand and implement big data analysis solutions in pandas with an emphasis on performance. This book strengthens your intuition for working with pandas, the Python data analysis library, by exploring its underlying implementation and data structures.Thinking in Pandas introduces the topic of big data and demonstrates concepts by looking at exciting and impactful projects that pandas helped to solve. From there, you will learn to assess your own projects by size and type to see if pandas is the appropriate library for your needs. Author Hannah Stepanek explains how to load and normalize data in pandas efficiently, and reviews some of the most commonly used loaders and several of their most powerful options. You will then learn how to access and transform data efficiently, what methods to avoid, and when to employ more advanced performance techniques. You will also go over basic data access and munging in pandas and the intuitive dictionary syntax. Choosing the right DataFrame format, working with multi-level DataFrames, and how pandas might be improved upon in the future are also covered.By the end of the book, you will have a solid understanding of how the pandas library works under the hood. Get ready to make confident decisions in your own projects by utilizing pandas—the right way.WHAT YOU WILL LEARN* Understand the underlying data structure of pandas and why it performs the way it does under certain circumstances* Discover how to use pandas to extract, transform, and load data correctly with an emphasis on performance* Choose the right DataFrame so that the data analysis is simple and efficient.* Improve performance of pandas operations with other Python librariesWHO THIS BOOK IS FORSoftware engineers with basic programming skills in Python keen on using pandas for a big data analysis project. Python software developers interested in big data.Hannah Stepanek is a software developer with a passion for performance and is an open source advocate. She has over seven years of industry experience programming in Python and spent about two of those years implementing a data analysis project using pandas.Hannah was born and raised in Corvallis, OR, and graduated from Oregon State University with a major in Electrical Computer Engineering. She enjoys engaging with the software community, often giving talks at local meetups as well as larger conferences. In early 2019, she spoke at PyCon US about the pandas library and at OpenCon Cascadia about the benefits of open source software. In her spare time she enjoys riding her horse Sophie and playing board games.
Beginning Ring Programming
Gain a gentle introduction to the world of Ring programming with clarity as a first concern using a lot of practical examples. The first part lays the foundations of the language and its basic features (data types, control structures, functions, and classes). The unique way to rigorously structure Ring programs is also explained.Then, in the second part you’ll discover Ring inputs, outputs, and what is in between. You’ll use the basic constructs of computer logic (sequence, selection, and iteration) to build simple and complex logic flows. You’ll go over the common mistakes that lead to code complexity, by example, and cover several strategies to solve them (refactoring, code cleansing, and good variable naming). Then, you’ll see a visual illustration of how Ring deals with scopes at the local, object, and global levels.In part three, you’ll play with two artifacts vital to Ring programming: functions and objects. You’ll learn how they can be composed to solve a problem and how advanced programming paradigms, such as declarative and natural, are beautifully implemented on top of them. As part of the discussion, you’ll also work on game programming. You’ll learn how you design your game declaratively, in Ring code, just as if you were designing it in visual software.Finally, the author lays out how programming can be understood in a gamified context. You will be told the truth about how gaming can be a better metaphor to achieve mastery of Ring programming.This book is for those who are passionate about writing beautiful, expressive, and learnable code. It has been designed so you can enjoy a beginner-friendly set of knowledge about Ring, and benefit from a one-stop collection of lessons learned from real-world, customer-facing programming projects.WHAT YOU WILL LEARN* Get started with Ring and master its data types, I/O, functions, and classes* Carry out structural, object-oriented, functional, declarative, natural, and meta programming in Ring* Use the full power of Ring to refactor program code and develop clean program architectures* Quickly design professional-grade video games on top of the Ring game engineWHO THIS BOOK IS FORBeginners looking for a consistent and hackable programming environment with a strong flavor of learnability and expressiveness.Mansour Ayouni is one of the leading contributors to the new Ring programming language. He wrote his first BASIC computer statement, in the mid-80s, using only pen and paper, when he was 10 years old. It wasn’t in a California garage though nor under the lights of the prestigious Evil tour of Paris, but in the rural village of Regueb in the center of Tunisia (North Africa) where there was no electricity nor computers at all. Over the years, programming took him in an otherwise impossible international journey. From Tunisia, to Niger, to Canada, he contributed to the development of dozens of software products ranging from lawyer office management solutions to banking and nuclear waste management systems. During his career, he used to oversee programmers from three cultures and lead software teams in various companies such as Whitecape, Keyrus, and Webgenetics. Now, he is a member of the Ring core team and running Kalidia Consulting helping businesses make effective software. Chapter 1: Getting Started with RingChapter 2: Data Types in RingChapter 3: Ins of RingChapter 4: Outs of RingChapter 5: Ring AlgorithmsChapter 6: Juggling with ScopesChapter 7: Functions, Objects and BeyondChapter 8: Designing Games in RingChapter 9: A Gamified Foundation for Mastering RingAppendix A: A Dialogue with Mahmoud Fayed
Advanced Perl Programming
William "Bo" Rothwell's Advanced Perl Programming continues where his previous book left off, more or less, as it guides you through advanced techniques of the Perl programming language starting with command-line options, references, and arrays and hashes from advanced data types. Next, you'll learn about typeglobs for symbolic entries.Additionally, you'll see advanced subroutine handling, then packages and namespaces. Furthermore, you'll build advanced modules and install CPAN modules. Unlike Java and C++, modules have been around in Perl for a long time now. Along the way, you'll learn and use POD mark up language for Perl documentation.Moreover, you'll get a survey of the many advanced features and data structures of the current Perl programming language. You'll also get a survey of the new features of the latest Perl 5.x release. After reading and using this book, you'll have the tools, techniques, and source code to be an expert Perl programmer.WHAT YOU WILL LEARN* Carry out command-line parsing and extract scripts * Create references; return values from a reference; work with the ref Function and strict refs* Work with advanced Perl data types using arrays, hashes, and hash of hashes * Use Typeglobs for symbol table entries * Build modules and install CPAN modules* Write documentation for Perl using POD * Work with the newest features in Perl, including the smartmatch operator, yada yada, automated regex modifiers, the CORE namespace and moreWHO THIS BOOK IS FORThose with experience with Perl or who have read Rothwell's prior books, Beginning Perl Programming and Pro Perl Programming. At the impressionable age of 14, William "Bo" Rothwell crossed paths with a TRS-80 Micro Computer System (affectionately known as a “Trash 80”). Soon after the adults responsible for Bo made the mistake of leaving him alone with the TSR-80. He immediately dismantled it and held his first computer class, showing his friends what made this “computer thing” work. Since this experience, Bo’s passion for understanding how computers work and sharing this knowledge with others has resulting in a rewarding career in IT training. His experience includes Linux, Unix, DevOps tools, and programming languages such as Perl, Python, Tcl, and BASH.Chapter One Command Line Options1.1 Introducing Command Line Options1.2 Changing Input Record Separator1.3 Create a Loop Around Your Script1.4 Editing in Place1.5 Syntax Checking1.6 Pre-appending to @INC1.7 Including Modules1.8 Command Line Parsing1.9 Displaying Configuration Information1.10 Extracting Scripts from Messages1.11 Additional Resources1.12 Lab ExercisesChapter Two References2.1 What are References?2.2 Creating References2.3 Returning the Value from a Reference2.4 The ref Function2.5 Making Anonymous References2.6 References to Functions2.7 use strict ‘refs’2.8 Additional Resources2.9 Lab ExercisesChapter Three Advanced Data Types: Arrays3.1 Review: What You Should Already Know About Arrays3.2 What You Might Know About Arrays3.3 Arrays of Arrays3.4 Creating Arrays of Arrays3.5 Accessing Values in an Array of Arrays3.6 Adding a Sub Array (Row)3.7 Adding a column3.8 Printing an Array of Arrays3.9 Additional Resources3.10 Lab ExercisesChapter Four Advanced Data Types: Hashes4.1 Review: What You Should Already Know About Hashes4.2 What You Might Know About Hashes4.3 Hashes of Hashes4.4 Creating Hashes of Hashes4.5 Accessing Values in a Hash of Hashes4.6 Other Data Structures4.7 Additional Resources4.8 Lab ExercisesChapter Five Typeglobs5.1 Symbolic Tables5.2 Typeglobs5.3 Using typeglobs5.4 References vs. Typeglobs5.5 Avoiding Aliases to Entire Identifier5.6 Making constants5.7 Passing Filehandles into Functions5.8 Redefining a Function5.9 Temporarily Redefining a Function5.10 Additional Resources5.11 Lab ExercisesChapter Six Advanced Subroutine Handling6.1 Review: What You Should Already Know About Functions6.2 What You Might Know About Functions6.3 Making Persistent Function Variables6.4 Using the caller Function6.5 Passing Arguments by Reference6.6 Determining Functions Return Data6.7 Returning Multiple Values6.8 Exception Handling6.9 Constant Functions6.10 Prototypes6.11 Additional Resources6.12 Lab ExercisesChapter Seven Packages and Namespaces7.1 Scope7.2 Creating Namespaces with the package Command7.3 Fully Qualified Package Names7.4 Nested Packages7.5 use strict 'vars'7.6 Identifiers Not Affected by Packages7.7 Determine the Current Package7.8 Packages vs. my Variables7.9 Additional Resources7.10 Lab ExercisesChapter Eight Building Modules8.1 Introduction to Perl Modules8.2 Creating a Module8.3 BEGIN and END Blocks8.4 Symbol Tables in Modules8.5 Exporting Identifiers from Modules8.6 Private Identifiers8.7 Oking Symbols to Export from Modules8.8 Module Version Numbers8.9 use vs. require8.10 A Note About Library Files8.11 Additional Resources8.12 Lab ExercisesChapter Nine Installing CPAN Modules9.1 What is CPAN?9.2 Accessing CPAN9.3 CPAN Organization9.4 Installing a CPAN Module Manually9.5 Installing CPAN Modules Using the CPAN Module9.6 Using the Perl Package Manager to Install CPAN Modules9.7 Listing What Modules are Currently Installed9.8 Additional Resources9.9 Lab ExercisesChapter Ten POD10.1 Overview of POD10.2 POD Commands10.3 POD Text10.4 POD Verbatim10.5 POD Examples10.6 Common POD Problems10.7 POD Utilities10.8 Additional Resources10.9 Lab ExercisesChapter Eleven Advanced Features11.1 Perl development environments11.2 The power of the do statement11.3 autodie11.4 String variables as files11.5 File::Spec11.6 Proper use of soft references11.7 Install modules from CPAN without admin privileges11.8 Basic testing11.9 Advanced testing11.10 Using prove11.11 BenchmarkingChapter Twelve Advanced Data Structures12.1 Introduction to Benchmarking12.2 Use the Readonly module to create constants12.3 Make large numbers more readable12.4 Make use of Scalar::Util12.5 Make use of List::Util12.6 Make use of List::MoreUtils12.7 List formatting12.8 Understand slices12.9 Make use of Hash::Util12.10 Make use of Hash::MoreUtils12.11 Smart use of subscripts12.12 Understand the advantages and disadvantages of for, foreach, grep and map12.13 Know different sort techniques12.14 Avoid using memory to store large dataChapter Thirteen New Features12.1 Perl versions12.2 The latest/greatest?12.3 Changes by version12.4 The feature pragma12.5 Make use of the Smartmatch Operator12.6 The // operator12.7 The UNITCHECK block12.8 Yada yada12.9 The autodie pragma12.10 Using each, keys, values with arrays 12.11 New Regular Expression modifiers12.12 Non-destructive substation12.13 Automating Regular Expression modifiers12.14 New feature for given12.15 Change in use feature12.16 The CORE namespace12.17 Overriding Perl keywords
Beginning PyQt
Learn GUI application development from the ground up, taking a practical approach by building simple projects that teach the fundamentals of using PyQt. Each chapter gradually moves on to teach more advanced and diverse concepts to aid you in designing interesting applications using the latest version of PyQt.You’ll start by reviewing the beginning steps of GUI development from, using different projects in every chapter to teach new widgets or concepts that will help you to build better UIs. As you follow along, you will construct more elaborate GUIs, covering topics that include storing data using the clipboard, graphics and animation, support for SQL databases, and multithreading applications. Using this knowledge, you’ll be able to build a photo editor, games, a text editor, a working web browser and an assortment of other GUIs.Beginning PyQt will guide you through the process of creating UIs to help you bring your own ideas to life. Learn what is necessary to begin making your own applications and more with PyQt!WHAT YOU'LL LEARN* Create your own cross-platform GUIs with PyQt and Python* Use PyQt’s many widgets and apply them to building real applications* Build larger applications and break the steps into smaller parts for deeper understanding* Work with complex applications in PyQt, from animation to databases and moreWHO THIS BOOK IS FORIndividuals who already have a fundamental understanding of the Python programming language and are looking to either expand their skills in Python or have a project where they need to create a UI, but may have no prior experience or no idea how to begin.Joshua Willman began using Python in 2015, when his first task was to build neural networks using machine learning libraries, including Keras and Tensorflow, for image classification. While creating large image data sets for his research, he needed to build a GUI that would simplify the workload and labeling process, which introduced him to PyQt. He currently works as a Python Developer and Instructor, designing courses to help others learn about coding in Python for game development, AI and machine learning, and programming using microcontollers. More recently, he set up the site Red Huli to explore his and others’ interests in using Python and programming for creative purposes.BEGINNING PYQTChapter 1 - Charting the CourseChapter 2 - Getting StartedChapter 3 - Adding Functions Through ButtonsChapter 4 - Learning about LayoutChapter 5 - Menus, Toolbars,and MoreChapter 6 - Styling Your GUIsChapter 7 - Creating GUIs with Qt DesignerChapter 8 - Working with the ClipboardChapter 9 - Graphics and Animation in PyQtChapter 10 - Intro to Handling DatabasesChapter 11 - Asynchronous ProgrammingChapter 12 - Extra ProjectsAppendix A - Reference Guide for PyQtAppendix B - Python Refresher
SQLScript für SAP HANA
Mit diesem Buch gelingt Ihr Einstieg in SQLScript! Machen Sie sich mit den Grundlagen der Abfragesprache vertraut, und lernen Sie die Sprachelemente und Einsatzszenarien kennen. Schritt für Schritt führt Jörg Brandeis Sie durch die Implementierung von SQLScript-Funktionen und -Prozeduren, mit denen Sie die Ablauflogik auf der Datenbank bestimmen. Sie lernen, wie Sie datenbanknah programmieren und die beste Performance aus SAP HANA herausholen. Aus dem Inhalt: SAP Web IDESQL-KonsoleDeklarative und imperative ProgrammierungLesender und schreibender DatenbankzugriffAblauflogikTabellen, Views, Sequenzen und TriggerSQL und SQLScriptABAP Managed Database ProceduresSAP HANA als EntwicklungsumgebungCode optimieren Einleitung ... 15 1. SAP HANA ... 23 1.1 ... Was ist SAP HANA? ... 24 1.2 ... Systemarchitektur ... 32 1.3 ... Organisation der Datenbankobjekte ... 35 1.4 ... Entwicklungsumgebungen ... 39 1.5 ... SQL-Konsole ... 48 2. Die ersten Schritte mit SQLScript ... 53 2.1 ... SQL vs. SQLScript ... 54 2.2 ... Grundlegende Sprachelemente ... 57 2.3 ... Modularisierung und logische Container ... 77 2.4 ... Programmbeispiel ... 97 3. Deklarative Programmierung in SQLScript ... 111 3.1 ... Tabellenvariablen ... 112 3.2 ... SELECT-Anweisung ... 114 3.3 ... Sonstige Operatoren ... 162 4. Datentypen und ihre Verarbeitung ... 167 4.1 ... Zeichenketten ... 168 4.2 ... Datum und Zeit ... 191 4.3 ... Numerische Daten ... 206 4.4 ... Binäre Datentypen ... 218 4.5 ... Konvertierungen zwischen den Datentypen ... 222 4.6 ... Datenreihen erzeugen ... 223 5. Schreibender Zugriff auf die Datenbank ... 227 5.1 ... INSERT ... 228 5.2 ... UPDATE ... 231 5.3 ... UPSERT oder REPLACE ... 233 5.4 ... MERGE INTO ... 235 5.5 ... DELETE ... 237 5.6 ... TRUNCATE TABLE ... 238 6. Imperative Programmierung ... 239 6.1 ... Variablen ... 239 6.2 ... Ablaufsteuerung mit IF und ELSE ... 257 6.3 ... Schleifen ... 261 6.4 ... Cursors ... 265 6.5 ... Arrays ... 269 6.6 ... Transaktionssteuerung ... 276 6.7 ... Dynamisches SQL ausführen ... 279 6.8 ... Fehlerbehandlung ... 285 7. Datenbankobjekte anlegen, löschen und verändern ... 291 7.1 ... Tabellen ... 292 7.2 ... Benutzerdefinierte Tabellentypen ... 298 7.3 ... Sichten (Views) ... 299 7.4 ... Sequenzen ... 301 7.5 ... Trigger ... 303 8. SQLScript in ABAP-Programmen ... 307 8.1 ... AMDP-Prozeduren ... 311 8.2 ... CDS-Tabellenfunktionen ... 325 8.3 ... AMDP-Funktionen für AMDP-Methoden ... 333 8.4 ... Alternativen zu den AMDP für den Aufruf von SQLScript-Code aus ABAP-Programmen ... 336 8.5 ... Empfehlungen ... 337 9. SQLScript in SAP BW und SAP BW/4HANA ... 339 9.1 ... Transformationsroutinen als AMDP ... 344 9.2 ... Aufeinanderfolgende Transformationen und gemischte Ausführung ... 347 9.3 ... Die generierte AMDP-Klasse ... 348 9.4 ... Die einzelnen Routinen ... 356 9.5 ... Fehlerverarbeitung und Error Stack ... 361 10. Sauberer SQLScript-Code ... 367 10.1 ... Die Lesbarkeit des Codes ... 368 10.2 ... Performance-Empfehlungen ... 382 11. Tests, Fehler- und Performanceanalyse ... 385 11.1 ... Test von SQLScript Code ... 386 11.2 ... Die Debugger für SQLScript ... 396 11.3 ... Performanceanalyse ... 411 Anhang ... 431 A ... Einrichtung einer SAP-HANA-Instanz als Entwicklungsumgebung ... 433 B ... Datenmodell: Aufgabenverwaltung ... 451 C ... Abkürzungsverzeichnis ... 455 D ... Der Autor ... 457 Index ... 459
Einführung in Java
Mit diesem Buch steigen Sie ohne Vorkenntnisse in Java und die objektorientierte Programmierung ein. Schritt für Schritt machen Sie sich mit der Sprache und ihren Konzepten vertraut. Sie lernen, in Algorithmen zu denken und Java sowie die vielen Werkzeuge Ihrer Plattform geschickt zu nutzen. Immer praxisnah und mit Gefühl für mögliche Verständnishürden: So werden auch professionelle Themen wie Testabdeckung, Multithreading und Servletentwicklung einsteigergerecht vermittelt. Schließlich schreiben Sie zeitgemäßen Code, der auch komplexe Software trägt. Ideal für Ausbildung, Studium und Beruf! Aus dem Inhalt: Die Entwicklungsumgebung einrichten und kennenlernenGrundkonzepte glasklar vorgestelltSprachmittel gründlich verstehenNeue Features einsetzenUnit Tests und Test Driven DesignDatenbanken anbindenIn Servlet-Technologie einsteigenEvents einsetzen und asynchron programmierenGUIs entwickelnGuten Code schreibenMit Dateien und Streams arbeitenIn die Entwicklung von Android-Apps einsteigen Materialien zum Buch ... 19 1. Einführung ... 21 1.1 ... Was ist Java? ... 22 1.2 ... Die Arbeitsumgebung installieren ... 28 1.3 ... Erste Schritte in NetBeans ... 30 1.4 ... Das erste Programm ... 32 1.5 ... In Algorithmen denken, in Java schreiben ... 41 1.6 ... Die Java-Klassenbibliothek ... 47 1.7 ... Dokumentieren als Gewohnheit -- Javadoc ... 50 1.8 ... JARs erstellen und ausführen ... 56 1.9 ... Mit dem Debugger arbeiten ... 61 1.10 ... Das erste eigene Projekt ... 66 1.11 ... Zusammenfassung ... 68 2. Variablen und Datentypen ... 69 2.1 ... Variablen ... 69 2.2 ... Primitivtypen ... 73 2.3 ... Objekttypen ... 87 2.4 ... Objekt-Wrapper zu Primitiven ... 91 2.5 ... Array-Typen ... 94 2.6 ... Zusammenfassung ... 96 3. Entscheidungen ... 97 3.1 ... Entweder-oder-Entscheidungen ... 97 3.2 ... Logische Verknüpfungen ... 104 3.3 ... Mehrfach verzweigen mit »switch« ... 110 3.4 ... Zusammenfassung ... 116 4. Wiederholungen ... 117 4.1 ... Bedingte Wiederholungen mit »while« ... 117 4.2 ... Abgezählte Wiederholungen -- die »for«-Schleife ... 121 4.3 ... Abbrechen und überspringen ... 123 4.4 ... Zusammenfassung ... 126 5. Klassen und Objekte ... 127 5.1 ... Klassen und Objekte ... 128 5.2 ... Access-Modifier ... 130 5.3 ... Felder ... 132 5.4 ... Methoden ... 133 5.5 ... Warum Objektorientierung? ... 142 5.6 ... Konstruktoren ... 144 5.7 ... Statische Felder und Methoden ... 148 5.8 ... Unveränderliche Werte ... 151 5.9 ... Spezielle Objektmethoden ... 154 5.10 ... Zusammenfassung ... 156 6. Objektorientierung ... 157 6.1 ... Vererbung ... 158 6.2 ... Interfaces und abstrakte Datentypen ... 171 6.3 ... Übung: Objektorientierte Modellierung ... 179 6.4 ... Innere Klassen ... 180 6.5 ... Enumerationen ... 187 6.6 ... Zusammenfassung ... 190 7. Unit Testing ... 191 7.1 ... Das JUnit-Framework ... 193 7.2 ... Fortgeschrittene Unit Tests ... 199 7.3 ... Besseres Design durch Testfälle ... 205 7.4 ... Zusammenfassung ... 208 8. Die Standardbibliothek ... 209 8.1 ... Zahlen ... 209 8.2 ... Strings ... 214 8.3 ... Reguläre Ausdrücke ... 224 8.4 ... Zeit und Datum ... 231 8.5 ... Internationalisierung und Lokalisierung ... 236 8.6 ... Zusammenfassung ... 244 9. Fehler und Ausnahmen ... 245 9.1 ... Exceptions werfen und behandeln ... 245 9.2 ... Verschiedene Arten von Exceptions ... 252 9.3 ... Invarianten, Vor- und Nachbedingungen ... 258 9.4 ... Zusammenfassung ... 260 10. Arrays und Collections ... 261 10.1 ... Arrays ... 261 10.2 ... Die for-each-Schleife ... 271 10.3 ... Variable Parameterlisten ... 271 10.4 ... Collections ... 273 10.5 ... Typisierte Collections -- Generics ... 278 10.6 ... Maps ... 288 10.7 ... Zusammenfassung ... 290 11. Lambda-Ausdrücke ... 291 11.1 ... Was sind Lambda-Ausdrücke? ... 292 11.2 ... Die Stream-API ... 304 11.3 ... Un-Werte als Objekte -- »Optional« ... 321 11.4 ... Eine Warnung zum Schluss ... 324 11.5 ... Zusammenfassung ... 325 12. Dateien, Streams und Reader ... 327 12.1 ... Dateien und Verzeichnisse ... 328 12.2 ... Reader, Writer und die »anderen« Streams ... 334 12.3 ... Objekte lesen und schreiben ... 346 12.4 ... Netzwerkkommunikation ... 349 12.5 ... Zusammenfassung ... 352 13. Multithreading ... 353 13.1 ... Threads und Runnables ... 354 13.2 ... Atomare Datentypen ... 361 13.3 ... Synchronisation ... 362 13.4 ... Fortgeschrittene Koordination zwischen Threads ... 370 13.5 ... Die Zukunft -- wortwörtlich ... 376 13.6 ... Das Speichermodell von Threads ... 381 13.7 ... Zusammenfassung ... 383 14. Servlets -- Java im Web ... 385 14.1 ... Einen Servlet-Container installieren ... 386 14.2 ... Die erste Servlet-Anwendung ... 392 14.3 ... Servlets programmieren ... 403 14.4 ... Java Server Pages ... 410 14.5 ... Langlebige Daten im Servlet -- Ablage in Session und Application ... 416 14.6 ... Fortgeschrittene Servlet-Konzepte -- Listener und Initialisierung ... 419 14.7 ... Zusammenfassung ... 422 15. Datenbanken und Entitäten ... 423 15.1 ... Was ist eine Datenbank? ... 424 15.2 ... Mit einer Datenbank über die JPA verbinden ... 431 15.3 ... Anwendung und Entitäten ... 436 15.4 ... Entitäten laden ... 439 15.5 ... Entitäten löschen ... 444 15.6 ... Beziehungen zu anderen Entitäten ... 445 15.7 ... Zusammenfassung ... 452 16. GUIs mit JavaFX ... 453 16.1 ... Einführung ... 453 16.2 ... Installation ... 454 16.3 ... Architektur von JavaFX ... 454 16.4 ... GUI-Komponenten ... 457 16.5 ... Layouts ... 468 16.6 ... GUI mit Java-API -- Urlaubsverwaltung ... 478 16.7 ... Event-Handling ... 482 16.8 ... JavaFX-Properties und Binding ... 489 16.9 ... Deklarative GUIs mit FXML ... 495 16.10 ... Layout mit CSS ... 501 16.11 ... Transformationen, Animationen und Effekte ... 505 16.12 ... Übungen ... 512 16.13 ... Zusammenfassung ... 513 17. Android ... 515 17.1 ... Einstieg in die Android-Entwicklung ... 515 17.2 ... Eine Benutzeroberfläche designen ... 528 17.3 ... Anwendungen mit mehreren Activities ... 535 17.4 ... Permissions und SystemServices ... 542 17.5 ... Apps im Play Store veröffentlichen ... 546 17.6 ... Zusammenfassung ... 546 18. Hinter den Kulissen ... 549 18.1 ... Klassenpfade und Classloading ... 549 18.2 ... Garbage Collection ... 556 18.3 ... Flexibel codieren mit der Reflection-API ... 563 18.4 ... Blick in die Zukunft ... 569 18.5 ... Zusammenfassung ... 572 19. Und dann? ... 573 19.1 ... Jakarta EE ... 574 19.2 ... Open-Source-Software ... 579 19.3 ... Ergänzende Technologien ... 580 19.4 ... Andere Sprachen ... 583 19.5 ... Programmieren Sie! ... 585 Anhang ... 587 A ... Java-Bibliotheken ... 589 B ... Lösungen zu den Übungsaufgaben ... 597 C ... Glossar ... 707 D ... Kommandozeilenparameter ... 723 Index ... 731
Datenvisualisierung - Grundlagen und Praxis
Professionelle Datenvisualisierung: So sprechen und überzeugen Ihre Daten* Herausragendes Grundlagenwerk zum Thema Datenvisualisierung * Einprägsam und anschaulich durch eine Vielzahl von guten und schlechten Beispielen* Hoher Praxisnutzen durch Tipps zu Diagrammtypen, dem Einsatz von Farben und Formen u.v.m.Wie wird Wissen, das in komplexen Datensätzen steckt, zugänglich? Durch professionelle Datenvisualisierung.Ob Data Scientist, Wissenschaftler, Analyst oder Berater oder einfach alle, die technische Dokumente oder Berichte erstellen müssen: Datenvisualisierung ist zu einer unverzichtbaren Kernkompetenz geworden.Claus O. Wilke bietet in seinem Grundlagenwerk eine systematische Einführung in die Prinzipien, Methoden und Konzepte der Datenvisualisierung - und das sehr praxisnah und anschaulich: durch solide Grundlagen und unzählige gute und schlechte Beispiele.Nach der Lektüre wissen Sie, was professionelle Abbildungen ausmacht:Welche Darstellungsmöglichkeiten gibt es? Wie entwickelt man ein aussagekräftiges Farbschema? Welcher Visualisierungstyp eignet sich am besten für die Geschichte, die Sie erzählen möchten?Wilkes Grundlagenwerk verzichtet bewusst auf Programmcode. Die beschriebenen Konzepte und Prinzipien können - ganz gleich mit welcher Visualisierungssoftware Sie arbeiten - angewendet werden. R-Nutzer finden den Code zu den Abbildungen auf GitHub.Claus O. Wilke ist Professor für Integrative Biology an der University of Texas in Austin, USA. Er hat an der Ruhr-Universität Bochum in theoretischer Physik promoviert. Claus ist Autor und Co-Autor von über 170 wissenschaftlichen Publikationen, die sich mit Themen aus den Bereichen Computational Biology, mathematische Modellierung, Bioinformatik, Evolutionsbiologie, Proteinbiochemie, Virologie und Statistik befassen. Er hat außerdem mehrere beliebte R-Pakete zur Datenvisualisierung wie cowplot und ggridges entwickelt und wirkt an der Entwicklung von ggplot2 mit.
Deep Learning - Grundlagen und Implementierung
Grundprinzipien und Konzepte neuronaler Netze systematisch und verständlich erklärt* Deep-Learning-Grundlagen für Data Scientists und Softwareentwickler mit Erfahrung im Machine Learning * Implementierung der Deep-Learning-Konzepte mit dem beliebten Framework PyTorch* Zahlreiche Codebeispiele in Python verdeutlichen die konkrete Umsetzung Dieses Buch vermittelt Ihnen das konzeptionelle und praktische Rüstzeug, um ein tiefes Verständnis für die Funktionsweise neuronaler Netze zu bekommen. Sie lernen die Grundprinzipien des Deep Learning kennen, zu deren Veranschaulichung Seth Weidman gut nachvollziehbare Konzeptmodelle entwickelt hat, die von Codebeispielen begleitet werden. Das Buch eignet sich für Data Scientists und Softwareentwickler mit Erfahrung im Machine Learning.Sie beginnen mit den Basics des Deep Learning und gelangen schnell zu den Details fortgeschrittener Architekturen, indem Sie deren Aufbau von Grund auf neu implementieren. Dabei lernen Sie mehrschichtige neuronale Netze wie Convolutional und Recurrent Neural Networks kennen. Diese neuronalen Netzwerkkonzepte setzen Sie dann mit dem beliebten Framework PyTorch praktisch um. Auf diese Weise bauen Sie ein fundiertes Wissen darüber auf, wie neuronale Netze mathematisch, rechnerisch und konzeptionell funktionieren.Seth Weidman ist Data Scientist. Er teilt seine Zeit auf zwischen der Lösung von Machine-Learning-Problemen bei Facebook und seinem Engagement für PyTorch. Zuvor war er im Bereich Machine Learning bei Trunk Club tätig und hat später Machine Learning und Deep Learning im Corporate Training Team von Metis unterrichtet. Seine Passion ist es, komplexe Konzepte einfach zu erklären.
Routineaufgaben mit Python automatisieren
US-BESTESELLER: GEGEN STUMPFSINNIGE COMPUTERAUFGABEN! * Neuauflage auf Python 3 aktualisiert * Lernen Sie, Python-Programme zu schreiben, die Ihnen automatisch alle möglichen Aufgaben abnehmen * Mit Schritt-für-Schritt-Anleitungen zu jedem Programm Wenn Sie jemals Stunden damit verbracht haben, Dateien umzubenennen oder Hunderte von Tabelleneinträgen zu aktualisieren, dann wissen Sie, wie stumpfsinnig manche Tätigkeiten sein können. Wie wäre es, den Computer dazu zu bringen, diese Arbeiten zu übernehmen? In diesem Buch lernen Sie, wie Sie mit Python Aufgaben in Sekundenschnelle erledigen können, die sonst viel Zeit in Anspruch nehmen würden. Programmiererfahrung brauchen Sie dazu nicht: Wenn Sie einmal die Grundlagen gemeistert haben, werden Sie Python-Programme schreiben, die automatisch alle möglichen praktischen Aufgaben für Sie abarbeiten: - eine oder eine Vielzahl von Dateien nach Texten durchsuchen - Dateien und Ordner erzeugen, aktualisieren, verschieben und umbenennen - das Web durchsuchen und Inhalte herunterladen - Excel-Dateien aktualisieren und formatieren - PDF-Dateien teilen, zusammenfügen, mit Wasserzeichen versehen und verschlüsseln - Erinnerungsmails und Textnachrichten verschicken - Online-Formulare ausfüllen Schritt-für-Schritt-Anleitungen führen Sie durch jedes Programm und Übungsaufgaben am Ende jedes Kapitels fordern Sie dazu auf, die Programme zu verbessern und Ihre Fähigkeiten auf ähnliche Problemstellungen zu richten. Verschwenden Sie nicht Ihre Zeit mit Aufgaben, die auch ein gut dressierter Affe erledigen könnte. Bringen Sie Ihren Computer dazu, die langweilige Arbeit zu machen! "The best part of programming is the triumph of seeing the machine do something useful. (This book) frames all of programming as these small triumphs; it makes the boring fun." Hilary Mason
Clean Code für Dummies
Clean Code ist eine wichtige Methode, um zu besserer Software zu kommen. Zu beachten sind Korrektheit, Verständlichkeit, Lesbarkeit und Ressourcenverbrauch. Programmieren ist aber mehr als ein Handwerk. Klarer Code ist auch Ausdruck klaren Denkens und beginnt damit schon vor der Niederschrift. Regeln sind wichtige Stützen, aber das eigenständige Denken, Entscheiden und Abwägen ersetzen sie nicht. Das Buch vermittelt handwerkliche Fertigkeiten und stellt das Programmieren in den Gesamtprozess der Softwareentwicklung. Jürgen Lampe ist IT-Berater in Eschborn in der Nähe von Frankfurt. Er hat Mathematik studiert, Prozessrechenanlagen programmiert und als Hochschullehrer an der TU Dresden gearbeitet. Über die Jahre hat er nie das Coden aufgegeben. Er kennt diverse Programmiersprachen - von Algol60 über PL/I und Pascal bis zu Java - und er kennt die Vor- und Nachteile verschiedener Programmierstile.Über den Autor 9EINLEITUNG 23Über dieses Buch 23Konventionen in diesem Buch 24Was Sie nicht lesen müssen 24Törichte Annahmen über die Leser 25Wie dieses Buch aufgebaut ist 26Symbole, die in diesem Buch verwendet werden 27Wie es weitergeht 28TEIL I: DAS CLEAN-CODE-PRINZIP 29KAPITEL 1 SOFTWARE IST CODE31Erwartungen an Software 31Probleme haben Ursachen 32Allgemeine Ursachen 32Hardwareentwicklung 33Nichts ohne Code 34Das Wichtigste in Kürze 35KAPITEL 2 DIMENSIONEN VON CODEQUALITÄT37Was bedeutet Qualität? 37Eigenschaften des Qualitätsbegriffs 37Qualitätsindikatoren 38Die Dimensionen von Codequalität 39Korrektheit des Codes 39Lesbarkeit und Wartbarkeit 40Leistungseigenschaften 40Weitere Dimensionen 41Das Qualitätsziel festlegen 41Beispiel: Der euklidische Algorithmus 42Das Wichtigste in Kürze 43KAPITEL 3 ALLES UNTER EINEN HUT – GUTE KOMPROMISSE FINDEN 45Warum gute Entscheidungen wichtig sind 45Es kommt drauf an 45Widersprüche überall 46Konflikte akzeptieren 47Entscheidungen systematisch treffen 48Konflikte erkennen 48Alternativen sammeln 48Kriterien finden 49Wahlmöglichkeiten bewerten 50Entscheiden 51Mit Augenmaß 51Das Wichtigste in Kürze 52KAPITEL 4 DIE EIGENSCHAFTEN SAUBEREN CODES55Des Clean Codes Kern 55Code als Ziel 56Professionalität 57Es geht immer weiter 58Code als Kommunikationsmittel zwischen Menschen 58Lesbarkeit 59Verständlichkeit 59Eleganz 60Gute Wartbarkeit 61Leichter durch Verständlichkeit 61Nicht ohne Test 61Zu guter Letzt 62Das Wichtigste in Kürze 63KAPITEL 5 IN DER PRAXIS: STOLPERSTEINE 65Clean Code ist schwer 65Reden wir über die Kosten 65Kurz- und mittelfristige Vorteile 66Langfristige Vorteile 66Bewertung 68Ändern bleibt schwierig 68Manchmal passt es nicht 69Frameworks 70Projektvorgaben 70Starre Abläufe 71Falsche Autoritäten 71Es liegt an Ihnen 73Das Wichtigste in Kürze 73TEIL II: AN HERAUSFORDERUNGEN WACHSEN 75KAPITEL 6 MEHR ALS HANDWERKSKUNST77Programmieren ist schwer 77Software professionell entwickeln 79Softwareentwicklung braucht Handwerk 80Handwerk allein reicht nicht 82Das Wichtigste in Kürze 83KAPITEL 7 ENTWICKELN IST (KREATIVE) WISSENSCHAFT 85Formalisiertes Wissen 85Was sind formale Theorien? 86Wann braucht es eine (neue) Theorie? 87Wie Sie zu einer Theorie kommen? 88Mentales Modell als Theorie 88Wenn es so einfach wäre: Viele Hürden 89Und dann auch noch der kleine Rest 90Konsequenzen 91Die Bedeutung des Entwicklers darf nicht unterschätzt werden 91Es werden verschiedene Qualifikationen gebraucht 92Auch die Theorie muss weiterentwickelt werden 93Das Wichtigste in Kürze 94KAPITEL 8 MODELLIERUNGSDILEMMA UND ENTSCHEIDUNGSMÜDIGKEIT 95Das Modellierungsdilemma 95Was macht ein Modell aus? 95Ein Modell für alle Anforderungen gesucht 96Und wenn es kein umfassendes Modell gibt? 98Entscheiden ermüdet 100Entwickeln heißt entscheiden 100Entscheidungskraft optimal nutzen 101Das Wichtigste in Kürze 103KAPITEL 9 FALLEN VERMEIDEN 105Erst mal loslegen 105Agil heißt nicht »kein Konzept« 105Abgrenzung ist alles 106Wenn es nicht anders geht 107Schön flexibel bleiben 108Flexible Programme 109Flexibilität bläht auf 109Die Sinnfrage 110Modularisierung übertreiben 111Davon verschwindet die Komplexität nicht 111Zerlegung will geübt sein 112Schon wieder: Kosten 113Wachsen im Korsett 113Das Wichtigste in Kürze 114TEIL III: SAUBEREN CODE SCHREIBEN 115KAPITEL 10 NAMEN SIND NICHT SCHALL UND RAUCH 117Benennungen 117Namen versus Bezeichner 118Namen versus Begriffe 118Woher nehmen? 120Lösungsdomäne 120Anwendungsdomäne 120Eigenschaften guter Namen 121Den Sinn vermitteln 121Nicht in die Irre führen 121Sinnvolle Unterschiede 122Verschlüsselungen vermeiden 123Verwendbarkeit 124Klassen und Methoden 125Die Qual der Sprachwahl 125Englisch 126Deutsch 126Keine Empfehlung 126Was zu tun ist 127Das Wichtigste in Kürze 127KAPITEL 11 REINE FORMFRAGE – FORMATIERUNG129Das Auge liest mit 129Vertikales Formatieren 131Codelänge 131Vorbild Zeitung 131Vertikale Abstände 132Vertikale Ordnung 134Horizontales Formatieren 135Zeilenlänge 135Horizontale Abstände 136Einrückungen 138Automatische Formatierung 139Vorteile 139Nachteile 140Das Wichtigste in Kürze 140KAPITEL 12 CODE ZUERST – SIND KOMMENTARE NÖTIG? 141Code allein reicht nicht 141Erklärung gesucht 141Das große Missverständnis: Code spricht nur den Computer an 142Kommentare – hilfreich oder störend? 142Kommentare lügen – oft 143Sinnvolle Kommentare 143Rechtshinweise 143Unerledigtes 143Klarstellungen und Warnungen 144Algorithmen 144Spezifikationen 144Pragmatisches 146Schlechte Kommentare 147Nichtssagendes 147Auskommentierter Code 148Unterschiedliche Sprachen 148Fehlender Bezug 148JavaDoc 149Dokumentationen 150Schönheit 151Das Wichtigste in Kürze 152KAPITEL 13 KLEINE SCHRITTE – SAUBERE METHODEN153Methoden 153Begriffliche Klärung 154Eigenschaften 154Der Inhalt 155Abstraktion 155Trennung von Bearbeitung und Abfrage 155Testen 156Die Größe 156Eine Aufgabe 156Zeilenzahl 157Schachtelungsstruktur 158Parameter 159Anzahl 160Stellung 162Parameter vermeiden 162Testen 163Flag-Parameter 163Resultate 164Rückgabewerte 164Rückgabewert null 165Ergebnisparameter 166Rückkehrcodes 167Seiteneffekte 167Auswahlanweisungen 168Alles fließt 170Das Wichtigste in Kürze 170KAPITEL 14 PASSEND SCHNEIDEN – SCHNITTSTELLEN 171Die Rolle von Schnittstellen 171Mehr als ein Interface 171Isoliert betrachtet 172Im Verbund 172Komponenten 173Interface Segregation 174Schlanke Schnittstellen 174Kohäsion 175Kombination 179Keine Missverständnisse 180Exakte Beschreibung 180Voraussetzungen aufführen 181Vollständige Definition 182Tests und Mocks 182Kein Code ohne Fremdcode 183Eine unsichtbare Grenze 184Abhängigkeiten isolieren 184Wie es gehen könnte 185Das Wichtigste in Kürze 189KAPITEL 15 OBJEKTE UND DATENSÄTZE UNTERSCHEIDEN191Was ist ein Objekt? 191Und ein Datensatz? 192Die Praxis 193Die Objekt-Datensatz-Antisymmetrie 194Java und Objektorientierung 194Prozeduraler Code 195Objektorientierter Code 197Schlussfolgerungen 199Das Gesetz von Demeter 199Internes intern halten 200Trotzdem kommunikativ sein 200Das gilt auch umgekehrt 202Aufrufketten 203Fazit 205Das Wichtigste in Kürze 205KAPITEL 16 WEGE IM DSCHUNGEL – REGELN 207Wiederholungen vermeiden 207Die Regel 207Motivation 208Umsetzung 209Schwierigkeiten 210Liefern, was verlangt wird 211Die Regel 211Motivation 212Umsetzung 212Schwierigkeiten 213Jedes für sich 213Die Regel 213Motivation 214Umsetzung 214Schwierigkeiten 214Die SOLID-Regeln 215Single Responsibility Principle – SRP 215Open Closed Principle – OCP 216Liskov Substitution Principle – LSP 217Interface Segregation Principle – ISP 217Dependency Inversion Principle – DIP 217Einfach besser 218Halte es einfach 218Geringste Überraschung 219Fazit 219Das Wichtigste in Kürze 219KAPITEL 17 FEHLER PASSIEREN – FEHLERBEHANDLUNG221Ausgangslage 221Fehlerarten 222Datenfehler 222Seltene Datenfehler 223Häufige Datenfehler 223Funktionsfehler 225Hardwarefehler 226Semantische Fehler 227Plausibilitätsprüfung 227Wertebereichs-Überschreitungen 229Keine Panik 231Das Wichtigste in Kürze 231KAPITEL 18 AUSNAHMEN REGELN – EXCEPTIONS 233Sinn und Zweck 233Checked und Unchecked Exceptions 234Kosten 235Werfen von Exceptions 235Generische Exceptions verwenden 235Spezielle Exceptions definieren 236Fangen von Exceptions 238Funktionsblöcke bestimmen 238Fachliche und technische Exceptions 239Verpacken von Exceptions 240Loggen von Exceptions 240Angemessenheit 241Das Wichtigste in Kürze 242KAPITEL 19 IMMER WEITER – NEUE SPRACHMITTEL243Wie beurteilen? 243Annotationen 245Funktion 246Anwendungsarten 246Risiken minimieren 248Lambda-Ausdrücke 248Klippen 248So vielleicht 250Streams 251Die Idee 252Anwendung 252Aber Vorsicht 253Fazit 254Spezialisierung 254Beschränkung 255Das Wichtigste in Kürze 256TEIL IV: WEGE ZUM ZIEL 257KAPITEL 20 MITEINANDER LERNEN – CODE REVIEWS 259Zweck 260Was nicht geht 260Das Potenzial 261Durchführung 262Erfolgsvoraussetzungen 262Vorbereitung 263Review-Rollen 265Review-Werkzeuge und Metriken 266Review-Bewertung 267Codequalität 267Review-Qualität 267Das Wichtigste in Kürze 268KAPITEL 21 AUS FEHLERN LERNEN 269Fehler macht jeder 269Fehler analysieren 270Fehlerursachen ermitteln 271Fehlerarten 272Priorisierung 272Denken Sie an … 273Erkenntnisse nutzen 275Code Reviews nutzen 275Ergebnisse dokumentieren 275Wiederholen: Erkenntnisse erneut erörtern 275Das Wichtigste in Kürze 276KAPITEL 22 ES GIBT IMMER WAS ZU TUN – REFACTORING 277Die Idee 277Die Praxis 278Vorbereitung 278Schritt für Schritt 280Im Großen und im Kleinen 280Ein Beispiel 281Das Wichtigste in Kürze 282TEIL V: DER TOP-TEN-TEIL 283KAPITEL 23 10 FEHLER, DIE SIE VERMEIDEN SOLLTEN 285Buch in Schrank stellen 285Nicht sofort anfangen 285Aufgeben 286Nicht streiten 286Schematisch anwenden 286Kompromisse verweigern 286Unrealistische Terminzusagen 287Überheblichkeit 287Denken, fertig zu sein 287Alles tierisch ernst nehmen 287KAPITEL 24 (MEHR ALS) 10 NÜTZLICHE QUELLEN ZUM AUFFRISCHEN UND VERTIEFEN 289Clean Code – das Buch und der Blog 289Clean Code Developer 290Software Craftsmanship 290Java Code Conventions 29097 Dinge, die jeder Programmierer wissen sollte 290The Pragmatic Bookshelf 291Prinzipien der Softwaretechnik 291Refactoring 291Code Reviews 291Codeanalyse 292Verzögerungskosten 292Project Oberon 292Stichwortverzeichnis 295