lighthouse-labs / swift-2048

2048 for Swift

swift-2048

A port of iOS-2048 to Apple's new Swift language. The game is present and working, but a number of auxiliary features haven't yet been implemented.

Like the original Objective-C version, swift-2048 does not rely upon SpriteKit. See the description for iOS-2048 for more information.

Instructions

You will need the Xcode 8 to build and run the project. This project also targets iOS 10.

Tap the button to play the game. Swipe to move the tiles.

Thoughts on Swift

Swift is a well-designed language that will, hopefully, drag mainstream programming halfway to ML (kicking and screaming the entire way, of course).

If you really want to see my out-of-date thoughts on Swift, check out the git history for README.md.

Features Swift has that Objective-C lacks

(Not comprehensive)

• Tuples
• Tagged enums (similar to Scala typeclasses)
• Primitive types treated like objects (actually structs) - extensions can declare new methods upon Int, for example
• Enums and structs that support functions and constructors
• override keyword to explicitly denote a method overriding a superclass implementation
• C++ style function overloading
• Optional function arguments with default values
• Nested functions
• Pattern matching (match with arbitrary conditionals on values, ranges, tuple structure, enums, or types)
• Generics (type reification, not type erasure)
• Typed containers
• Safe typecasting
• Optionals (and optional chaining, implicitly unwrapped optionals, weak vs unowned, ...)
• Overflow-safe arithmetic
• @auto_closure attribute, allowing for a very basic form of pass-by-name (as opposed to pass-by-value) function arguments
• @final attribute, to prevent overriding
• Other attributes, which have a purpose similar to Java annotations or Python decorators
• Type properties (analogous to class methods; must be computed for classes, but can be stored for enums and structs)
• Syntactical sugar for function currying
• Operator overloading
• Custom operators
• Arbitrary behavior for subscripts
• REPL
• Multiple forms of closure literal convenience syntax
• Capture lists in closure declarations, to avoid retain cycles when using closures
• Native range operators and limited array slicing (.. and ...)

Objective-C features with no direct native Swift idiom

(AFAIK; some of these might be available through interop)

• Method swizzling
• Key-Value Observing (KVO)
• Adding or modifying methods and classes at runtime
• Invocations
• Message proxying

Features I wish Swift had

• Better support for n-dimensional array initialization
• Tuples usable as dictionary keys (although there are technical issues)
• Python/MATLAB-style array slicing
• Abstract methods

License

(c) 2014 Austin Zheng. Released under the terms of the MIT license.

2048 by Gabriele Cirulli (http://gabrielecirulli.com/). The original game can be found at http://gabrielecirulli.github.io/2048/, as can all relevant attributions. 2048 is inspired by an iOS game called "Threes", by Asher Vollmer.