In this chapter from Cocoa Programming for OS X: The Big Nerd Ranch Guide, 5th Edition, you will build a simple 2D physics simulation. You will create your own structure and a few classes, and you will learn about the differences between them.
Charlie Hunt, author of Java Performance LiveLessons, offers advice on how to be successful at meeting a Java application's performance expectations.
Hal Fulton, author of The Ruby Way, points out some of the extensive changes Ruby has experienced in less than a decade. By paying attention to why and how programming languages evolve, we can learn from experience and past mistakes, deliberately changing the language (and especially our usage of it) for a better future.
The latest version of the open source framework Apache Cordova brings many changes, particularly in the command-line interface, plugins, and WebView. John M. Wargo, author of Apache Cordova 4 Programming, points out his favorite features and others whose improvements will simplify your development process.
This chapter from Mastering iOS Frameworks: Beyond the Basics, 2nd Edition demonstrates how to parse and present JSON from a sample message-board server in an app, and encode a new message entry in JSON to send to the server.
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