Swift language - A fast overview of some features

Short slide about Swift programming language and its features.

Learn about: variables, hello world, optionals, enumerators, emojis, differences between Objective-c.

Transcript

1. Swift Language A fast 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
4. Swift Hello World
5. Emoji Support
6. Swift Features • Optional types • Named/default parameters • Namespacing • Functions are first class citizens
7. Objective-c Bridging • NSArray == Array • NSDictionary == Dictionary • NSNumber == Int, Double, Float
8. Objective-c Extensions
9. Swift Extensions
10. Optionals • Used in situations where value is absent • Alternative for Objective-c nil passing • Works in any type • Can be safely unwrapped (if/else)
11. Lazy variables
12. Functions with Multiple Return Values
13. Immutability
14. Array Imutability It's a bug: https://devforums.apple.com/messages/971330#971330
15. Function currying
16. Protocols in Objective-c
17. Protocols in Swift
18. Auto closures
19. Enumerators
20. 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