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Objective-C plummets in popularity - InfoWorld
The venerable language for Apple development is losing ground, perhaps with a nudge from Swift.
http://www.infoworld.com/article/2989049/application-development/objective-c-plummets-in-popularity.html
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Swift vs. Objective-C: 10 Reasons The Future Favors Swift - InfoWorld
It's high time to make the switch to the more approachable, full-featured Swift for iOS and OS X app.
http://www.infoworld.com/article/2920333/mobile-development/swift-vs-objective-c-10-reasons-the-future-favors-swift.html
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A Eulogy for Objective C
With the birth of Swift, we face the passing of Objective-C. To mark this historic moment, long-time Objective-C developer and trainer Aaron Hillegass delivers an impassioned eulogy for a language he knew well.
https://realm.io/news/altconf-aaron-hillegass-eulogy-for-objective-c/
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Beginners Guide to Objective-C Programming
Permission to use, copy, modify and distribute the Beginners Guide to Objective-C Programming and its accompanying documentation for any purpose and without fee is hereby granted in perpetuity, provided that the above copyright notice and this paragraph appear in all copies.
http://gnustep.made-it.com/BG-objc/
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Objective-C Programming - Big Nerd Ranch
Best selling programming guides. Learn to develop with our books on Objective-C, iOS, Android, Mac and Cocoa programming.
https://www.bignerdranch.com/we-write/objective-c-programming/
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Objective-C Basics Course
iOS apps are written in the object-oriented superset of the C programming language called Objective-C. Without a good understanding of C and Objective-C it is not possible to be a competent and productive iOS developer.
https://teamtreehouse.com/library/objectivec-basics-3
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Ry's Objective C Tutorial
This tutorial is the place to learn the Objective-C programming language. It's designed to serve as both a concise quick-reference and a comprehensive introduction for newcomers to the language.
http://rypress.com/tutorials/objective-c/index
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Objective-C Tutorial
Objective-C Tutorial - Learning Objective-C in simple and easy steps : A beginner's tutorial containing complete knowledge of Objective-C Syntax Object Oriented Language, Methods, Overriding, Inheritance, Polymorphism, Interfaces, Error Handling, Protocols, Categories, Posing, Extension, Dynamic Binding and Foundation Framework.
http://www.tutorialspoint.com/objective_c/
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About Objective-C
Describes elements of best practice when writing code with Objective-C using ARC.
https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html
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Objective-C - Wikipedia, the free encyclopedia
Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language. It is the main programming language used by Apple for the OS X and iOS operating systems, and their respective application programming interfaces (APIs), Cocoa and Cocoa Touch.
https://en.wikipedia.org/wiki/Objective-C