Swift language - A fast overview of some features

Swift language - A fast overview of some features

• 1.
  Swift Language Afast overview of some features @wevtimoteo
• 2.
  Technical Features •Cocoa and CocoaTouch • Build in LLVM compiler • ARC (Automatic Reference Counting) memory management • Same runtime as Objective-C (Bridged) • No pointers • Static, inferred typing
• 3.
  Objective-c Hello World
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  Swift Hello World
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  Emoji Support
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  Swift Features •Optional types • Named/default parameters • Namespacing • Functions are first class citizens
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  Objective-c Bridging •NSArray == Array • NSDictionary == Dictionary • NSNumber == Int, Double, Float
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  Objective-c Extensions
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  Swift Extensions
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  Optionals • Usedin situations where value is absent • Alternative for Objective-c nil passing • Works in any type • Can be safely unwrapped (if/else)
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  Lazy variables
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  Functions with Multiple Return Values
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  Immutability
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  Array Imutability It'sa bug: https://devforums.apple.com/messages/971330#971330
• 15.
  Function currying
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  Protocols in Objective-c
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  Protocols in Swift
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  Auto closures
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  Enumerators
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  References • https://developer.apple.com/swift/ • http://swiftlang.eu/ • https://devforums.apple.com/community/tools/ languages/swift • https://speakerdeck.com/lebedev/swift • https://speakerdeck.com/dictav/swiftwoshao-sidake