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https://github.com/danielpi/Swift-Playgrounds

Learning Swift by working through example code in playgrounds
https://github.com/danielpi/Swift-Playgrounds

playground swift swift-playgrounds swift-programming-language

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Learning Swift by working through example code in playgrounds

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# Swift Playgrounds



Some experiments with Playgrounds in XCode 8.2 using the Swift programming language.



## The Swift Programming Language Book



I have been working through all the examples in the book Apple Inc. “The Swift Programming Language.” iBooks. https://itunes.apple.com/au/book/swift-programming-language/id881256329?mt=11. Each .playground file in the project relates to a chapter from the Swift Programming Language book.



I have implemented this as a single XCode project that contains a playground file for each chapter of the language reference book. I'm finding it quite useful to have this project open when I am writing Swift code as I can use the project wide search functionality to lookup any Swift features or syntax that I am unsure about (so long as I can remember the words to look for)



Below is a list of each of the files within the project (this is also a list of the chapters of the book that I have worked through).



- **A Swift Tour** contains the code from the "Swift Tour" chapter. It touches on most of the unusual features of the language and is easy to search through to find examples. It is a large file and does tend to give the swift interpreter a rather hard time.



Chapters from the Language guide. Each chapter goes into depth about its particular subject.



- **The Basics** This chapter covers basic value types like Strings, Ints, Bools and floats. The notation for exponent values in float literals is interesting. Comments are covered (nested /* */ comment blocks). TypeAlias is covered as are tuples. Optionals are touched on and assertions are mentioned.

- **Basic Operators** Arithmetic, remainder, increment, decrement, comparison, unary, ternary, range (closed and half-closed) and logical operators. There are examples of all of them.

- **Strings And Characters** Some details about Unicode literals (multi-byte characters). The countElements() function for finding the length of a string. Concatenating strings, Comparing strings and Interpolating strings (not much on splitting or parsing strings). 

- **Collection Types**

- **ControlFlow**

- **Functions**

- **Closures**

- **Enumerations**

- **Classes And Structures**

- **Properties**

- **Methods**

- **Subscripts**

- **Inheritance**

- **Initialization**

- **Deinitialization**

- **Automatic Reference Counting**

- **Optional Chaining**

- **Type Casting**

- **Nested Types**

- **Extensions**

- **Protocols**

- **Generics**

- **Advanced Operators**



## Using Swift with Cocoa and Objective-C Book

There are six playground files that work through the code in the “Using Swift with Cocoa and Objective-C.” iBook. https://itunes.apple.com/au/book/using-swift-cocoa-objective/id888894773?mt=11. They are listed below. The example from this book didn't translate as well to the playgrounds as the previous book examples did. 



- **Basic Setup**

- **Interacting With Objective-C-**

- **Writing Classes With Objective C Behaviour**

- **Working With Cocoa Data Types**

- **Adopting Cocoa Design Patterns**

- **InteractingWith C**



## Swift Standard Library

The documentation for the Swift Standard Library can be found at the following link https://developer.apple.com/library/prerelease/ios/documentation/General/Reference/SwiftStandardLibraryReference/. There is a wealth of information contained in the standard library doc and it is nicely organised so that it is easy to experiment with in a playground environment. I have attempted to extend the examples somewhat to try and show off some of the other features of the standard library.



- **String**

- **Array**

- **Dictionary**

- **NumericTypes**

- **Protocols**

- **FreeFunctions**

- **Undocumented**



## Swift Blog

The Swift blog contains several articles detailing interesting information about the developing language. 



- **2014-08-15 Value and Reference Types**

- **2014-08-05 Boolean**

- **2014-07-28 Interacting with C Pointers**

- **2014-07-23 Access Control**



## NSHipster

Lots of great articles delving into the finer points of Cocoa programming. The recent articles on Swift are always interesting to go through



- **2014-08-08 Swift Literal Convertibles** Shows how you can create types of your own that can be written as literals when you use them. 



# What next?

Here are some links to other projects around the web that I would also like to implement

- **Peter Norvig** has some great posts that delve into various programming topics. Mostly they are in Python though so it would be interesting to implement them in Swift.

	- http://norvig.com/spell-correct.html http://airspeedvelocity.net/2015/05/02/spelling/

	- http://nbviewer.ipython.org/url/norvig.com/ipython/TSPv3.ipynb

- **Erica Sandun** Has a book out and also publishes a lot of information about Swift Playgrounds. In particular she is able to get impressive graphics, windows and user inputs to work, which is something that I haven't figured out yet.

	- http://ericasadun.com/2015/05/04/swift-using-functions-to-initialize-view-types/