Kristopher Johnson kristopherjohnson
tomlokhorst
/ Optional+Unwrap.swift
Last active
December 26, 2017 19:50
Unwrap multiple optionals in Swift 1.0
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| func unwrap<T1, T2>(optional1: T1?, optional2: T2?) -> (T1, T2)? { | |
| switch (optional1, optional2) { | |
| case let (.Some(value1), .Some(value2)): | |
| return (value1, value2) | |
| default: | |
| return nil | |
| } | |
| } | |
| func unwrap<T1, T2, T3>(optional1: T1?, optional2: T2?, optional3: T3?) -> (T1, T2, T3)? { |
airspeedswift
/ GenericInfProb.swift
Last active
August 29, 2015 14:07
Swift for…in generic inference prob
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| // original version with problem | |
| struct A<T> { | |
| func f<S: SequenceType where S.Generator.Element == T>(s: S) { | |
| // error: cannot convert expression's type S to type S | |
| for v in s { | |
| print(v) | |
| } | |
| } | |
| } |
hooman
/ AssociatedObjects.swift
Last active
May 4, 2022 07:33
Take 2.0: A completely new take on Objective-C associated types. (See history for the ancient approach)
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| // Playground - noun: a place where people can play | |
| // | |
| // | |
| // By: Hooman Mehr ([email protected]) | |
| // Gist: https://gist.github.com/hooman/599e381d5f037b87d20b (The latest version is always here) | |
| // | |
| // | |
| // Update: 07/30/2014 | |
| // Added WeaklyOwned & removeOrphans for memory management support, added more generics & basic access control. | |
| // 08/06/2014 |
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| /* The Y combinator in Swift! | |
| For a discussion of what the heck this is all about, see http://www.ece.uc.edu/~franco/C511/html/Scheme/ycomb.html | |
| The nifty thing is that it allows us to implement recursion without the ability for a function to refer to itself from within its own definition. | |
| Note how we manage a recursive definition of factorial without any function referring to its own name. | |
| Thanks to @eridius for help with the SelfToUnderlying<T> type. | |
| */ |
mattt
/ Maths.swift
Last active
April 21, 2023 17:14
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| // See: https://devforums.apple.com/message/1000934#1000934 | |
| import Foundation | |
| // Logic | |
| operator prefix ¬ {} | |
| @prefix func ¬ (value: Bool) -> Bool { | |
| return !value | |
| } |
nubbel
/ Swift: convert range to array
Last active
July 4, 2023 13:00
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| protocol ArrayRepresentable { | |
| typealias ArrayType | |
| func toArray() -> ArrayType[] | |
| } | |
| extension Range : ArrayRepresentable { | |
| func toArray() -> T[] { | |
| return T[](self) | |
| } |
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| // Playground - noun: a place where people can play | |
| import Cocoa | |
| struct Regex { | |
| let pattern: String | |
| let expressionOptions: NSRegularExpressionOptions | |
| let matchingOptions: NSMatchingOptions | |
| init(pattern: String, expressionOptions: NSRegularExpressionOptions, matchingOptions: NSMatchingOptions) { |
kainosnoema
/ channel-example.swift
Last active
August 30, 2023 04:34
Golang-like concurrency semantics in Swift
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| import Foundation | |
| go(println("in a thread")) | |
| // buffered channel | |
| var c = Chan(buffer:20) | |
| // sending routing | |
| go { | |
| while(true) { |
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| extension Array { | |
| func first() -> Element? { | |
| if isEmpty { | |
| return nil | |
| } | |
| return self[0] | |
| } | |
| func last() -> Element? { |
robedge
/ gist:2044588
Created
March 15, 2012 14:51
— forked from salomvary/html5.html
HTML: minimal html5 boilerplate
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| <!doctype html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"/> | |
| <title></title> | |
| <!--[if lt IE 9]> | |
| <script src="//html5shim.googlecode.com/svn/trunk/html5.js"></script> | |
| <![endif]--> | |
| </head> | |
| <body> |