- Don't add code cruft. Avoid parentheses around conditions in if-statements or with the
return
keyword. Don't add semicolons except where syntactically demanded in statements or to separate statements on the same line. - Don't use ALL_CAPS; use camelCase
- Don't fight type inference. Use enumeration prefixes, self-references, and class names (with constructors) only when necessary or to clarify coding intent.
- Don't use
var
whenlet
is appropriate, especially for properties. The compiler better optimizeslet
statements for items whose values will not change during their lifetime. For example, Apple writes, "It is good practice to create immutable collections in all cases where the collection does not need to change. Doing so enables the Swift compiler to optimize the performance of the collections you create." - Don't use classes when structs will do. Use class
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import Foundation | |
class Box<T> { | |
let unbox: T | |
init(_ value: T) { self.unbox = value } | |
} | |
struct Notification<A> { | |
let name: String | |
} |
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// Playground - noun: a place where people can play | |
import Foundation | |
import UIKit | |
//~~~~~~~~~~~~~~~~ Error handling with enum Result<A> ~~~~~~~ | |
enum Result<A> { | |
case Error(NSError) | |
case Value(Box<A>) |
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import Foundation | |
class Box<T> { | |
let unbox: T | |
init(_ value: T) { self.unbox = value } | |
} | |
struct Notification<A> { | |
let name: String | |
} |
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// | |
// ISO3661-2alpha2.swift | |
// ISO3661-2-alpha2 | |
// | |
// Created by Bernd Rabe on 01.04.15. | |
// Copyright (c) 2015 Bernd Rabe. All rights reserved. | |
// | |
import UIKit |
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import Foundation | |
extension String | |
{ | |
var length: Int { | |
get { | |
return countElements(self) | |
} | |
} | |
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// Helper function to convert from RGB to UIColor | |
// UIColorFromRGB(0x22B573) | |
func UIColorFromRGB(rgbValue: UInt) -> UIColor { | |
return UIColor( | |
red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0, | |
green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0, | |
blue: CGFloat(rgbValue & 0x0000FF) / 255.0, | |
alpha: CGFloat(1.0) | |
) | |
} |
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if (!Function.prototype.bind) { | |
Function.prototype.bind = function (oThis) { | |
if (typeof this !== "function") { | |
// closest thing possible to the ECMAScript 5 internal IsCallable function | |
throw new TypeError("Function.prototype.bind - what is trying to be bound is not callable"); | |
} | |
var aArgs = Array.prototype.slice.call(arguments, 1), | |
fToBind = this, | |
fNOP = function () {}, |
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extension String { | |
func size(withAttributes attrs: [String:AnyObject], constrainedTo box: NSSize) -> NSRect { | |
let storage = NSTextStorage(string: self) | |
let container = NSTextContainer(containerSize: NSSize(width: box.width, height: box.height)) | |
let layout = NSLayoutManager() | |
layout.addTextContainer(container) | |
storage.addLayoutManager(layout) | |
storage.addAttributes(attrs, range: NSMakeRange(0, storage.length)) | |
container.lineFragmentPadding = 0.0 | |
let _ = layout.glyphRangeForTextContainer(container) |
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<div class="vcard"> | |
<div class="fn org">Wikimedia Foundation Inc.</div> | |
<div class="adr"> | |
<div class="street-address">149 New Montgomery Street, 3rd Floor</div> | |
<div> <span class="locality">San Francisco</span>, <abbr class="region" title="California">CA</abbr> <span class="postal-code">94105</span></div> | |
<div class="country-name">USA</div> | |
</div> | |
<div>Phone: <span class="tel">+1-415-839-6885</span></div> | |
<div>Email: <span class="email">info@wikimedia.org</span></div> | |
<div> |