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‎Design-Patterns.playground.zip

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‎Design-Patterns.playground/Documentation/section-35.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-bridge">🚧 Bridge</h2>
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<h2 id="-decorator">🍧 Decorator</h2>
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<h2 id="-bridge">🌉 Bridge</h2>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-37.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<p><strong>Usage:</strong></p>
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<p><strong>Usage</strong></p>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-39.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-proxy">🚧 Proxy</h2>
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<h1 id="behavioral">Behavioral</h1>
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<blockquote>
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<p>In software engineering, behavioral design patterns are design patterns that identify common communication patterns between objects and realize these patterns. By doing so, these patterns increase flexibility in carrying out this communication.</p>
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<p><strong>Source:</strong> <a href="http://en.wikipedia.org/wiki/Behavioral_pattern">wikipedia.org</a></p>
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</blockquote>
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<h2 id="-chain-of-responsibility">🚧 Chain Of Responsibility</h2>
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<h2 id="-command">👫 Command</h2>
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<h2 id="-decorator">🍧 Decorator</h2>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-43.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-iterator">🚧 Iterator</h2>
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<h2 id="-mediator">🚧 Mediator</h2>
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<h2 id="-memento">🚧 Memento</h2>
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<h2 id="-observer">📩 Observer</h2>
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<h2 id="-proxy">🚧 Proxy</h2>
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<h1 id="behavioral">Behavioral</h1>
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<blockquote>
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<p>In software engineering, behavioral design patterns are design patterns that identify common communication patterns between objects and realize these patterns. By doing so, these patterns increase flexibility in carrying out this communication.</p>
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<p><strong>Source:</strong> <a href="http://en.wikipedia.org/wiki/Behavioral_pattern">wikipedia.org</a></p>
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</blockquote>
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<h2 id="-chain-of-responsibility">🚧 Chain Of Responsibility</h2>
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<h2 id="-command">👫 Command</h2>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-47.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-state">🐉 State</h2>
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<h2 id="-iterator">🚧 Iterator</h2>
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<h2 id="-mediator">🚧 Mediator</h2>
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<h2 id="-memento">🚧 Memento</h2>
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<h2 id="-observer">📩 Observer</h2>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-51.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-strategy">💡 Strategy</h2>
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<h2 id="-state">🐉 State</h2>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-55.html

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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-visitor">🏃 Visitor</h2>
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<h2 id="-strategy">💡 Strategy</h2>
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</section>
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</div>

‎Design-Patterns.playground/Documentation/section-59.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Section 60</title>
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<meta id="xcode-display" name="xcode-display" content="render">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="viewport" content="width=device-width, maximum-scale=1.0">
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<link rel="stylesheet" type="text/css" href="stylesheet.css">
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</head>
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<body>
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<div class="content-wrapper">
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<section class="section">
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<h2 id="-visitor">🏃 Visitor</h2>
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</section>
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</div>
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</body>
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</html>

‎Design-Patterns.playground/Documentation/section-61.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Section 62</title>
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<meta id="xcode-display" name="xcode-display" content="render">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="viewport" content="width=device-width, maximum-scale=1.0">
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<link rel="stylesheet" type="text/css" href="stylesheet.css">
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</head>
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<body>
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<div class="content-wrapper">
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<section class="section">
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<p><strong>Usage:</strong></p>
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</section>
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</div>
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</body>
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</html>

‎Design-Patterns.playground/contents.xcplayground

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</documentation>
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<code source-file-name="section-58.swift">
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</code>
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<documentation relative-path="section-59.html">
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</documentation>
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<code source-file-name="section-60.swift">
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</code>
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<documentation relative-path="section-61.html">
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</documentation>
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<code source-file-name="section-62.swift">
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</code>
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</sections>
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</playground>

‎Design-Patterns.playground/section-36.swift

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protocol Coffee {
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func getCost() -> Double
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func getIngredients() -> String
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protocol Switch {
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var appliance: Appliance {get set}
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func turnOn()
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}
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class SimpleCoffee: Coffee {
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func getCost() -> Double {
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return 1.0
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}
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func getIngredients() -> String {
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return "Coffee"
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}
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protocol Appliance {
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func run()
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}
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class CoffeeDecorator: Coffee {
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private let decoratedCoffee: Coffee
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private let ingredientSeparator: String = ", "
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required init(decoratedCoffee: Coffee) {
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self.decoratedCoffee = decoratedCoffee
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}
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func getCost() -> Double {
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return decoratedCoffee.getCost()
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class RemoteControl: Switch {
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var appliance: Appliance
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func turnOn() {
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self.appliance.run()
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}
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func getIngredients() -> String {
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return decoratedCoffee.getIngredients()
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init(appliance: Appliance) {
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self.appliance = appliance
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}
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}
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class Milk: CoffeeDecorator {
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required init(decoratedCoffee: Coffee) {
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super.init(decoratedCoffee: decoratedCoffee)
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}
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override func getCost() -> Double {
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return super.getCost() + 0.5
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}
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override func getIngredients() -> String {
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return super.getIngredients() + ingredientSeparator + "Milk"
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class TV: Appliance {
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func run() {
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println("tv turned on");
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}
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}
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class WhipCoffee: CoffeeDecorator {
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required init(decoratedCoffee: Coffee) {
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super.init(decoratedCoffee: decoratedCoffee)
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}
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override func getCost() -> Double {
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return super.getCost() + 0.7
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}
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override func getIngredients() -> String {
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return super.getIngredients() + ingredientSeparator + "Whip"
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class VacuumCleaner: Appliance {
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func run() {
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println("vacuum cleaner turned on")
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}
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}

‎Design-Patterns.playground/section-38.swift

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var someCoffee: Coffee = SimpleCoffee()
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println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredients())")
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someCoffee = Milk(decoratedCoffee: someCoffee)
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println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredients())")
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someCoffee = WhipCoffee(decoratedCoffee: someCoffee)
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println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredients())")
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var tvRemoteControl = RemoteControl(appliance: TV())
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tvRemoteControl.turnOn()
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var fancyVacuumCleanerRemoteControl = RemoteControl(appliance: VacuumCleaner())
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fancyVacuumCleanerRemoteControl.turnOn()

‎Design-Patterns.playground/section-40.swift

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protocol FileOperationCommand {
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init(file: String)
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func execute()
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protocol Coffee {
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func getCost() -> Double
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func getIngredients() -> String
44
}
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6-
class FileMoveCommand : FileOperationCommand {
7-
let file:String
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required init(file: String) {
9-
self.file = file
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class SimpleCoffee: Coffee {
7+
func getCost() -> Double {
8+
return 1.0
109
}
11-
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func execute() {
13-
print("\(file) moved")
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func getIngredients() -> String {
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return "Coffee"
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}
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}
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class FileDeleteCommand : FileOperationCommand {
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let file:String
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required init(file: String) {
20-
self.file = file
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class CoffeeDecorator: Coffee {
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private let decoratedCoffee: Coffee
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private let ingredientSeparator: String = ", "
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19+
required init(decoratedCoffee: Coffee) {
20+
self.decoratedCoffee = decoratedCoffee
21+
}
22+
func getCost() -> Double {
23+
return decoratedCoffee.getCost()
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}
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func execute() {
24-
print("\(file) deleted")
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func getIngredients() -> String {
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return decoratedCoffee.getIngredients()
2527
}
2628
}
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class FileManager {
29-
let deleteCommand: FileOperationCommand
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let moveCommand: FileOperationCommand
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32-
init(deleteCommand: FileDeleteCommand, moveCommand: FileMoveCommand) {
33-
self.deleteCommand = deleteCommand
34-
self.moveCommand = moveCommand
35-
}
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37-
func delete () {
38-
deleteCommand.execute()
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}
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41-
func move () {
42-
moveCommand.execute()
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class Milk: CoffeeDecorator {
31+
required init(decoratedCoffee: Coffee) {
32+
super.init(decoratedCoffee: decoratedCoffee)
33+
}
34+
override func getCost() -> Double {
35+
return super.getCost() + 0.5
36+
}
37+
override func getIngredients() -> String {
38+
return super.getIngredients() + ingredientSeparator + "Milk"
39+
}
40+
}
41+
42+
class WhipCoffee: CoffeeDecorator {
43+
required init(decoratedCoffee: Coffee) {
44+
super.init(decoratedCoffee: decoratedCoffee)
45+
}
46+
override func getCost() -> Double {
47+
return super.getCost() + 0.7
48+
}
49+
override func getIngredients() -> String {
50+
return super.getIngredients() + ingredientSeparator + "Whip"
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}
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}

‎Design-Patterns.playground/section-42.swift

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let deleteCommand = FileDeleteCommand(file: "/path/to/testfile")
2-
let moveCommand = FileMoveCommand(file: "/path/to/testfile")
3-
let fileManager = FileManager(deleteCommand:deleteCommand , moveCommand: moveCommand)
4-
5-
fileManager.delete()
6-
fileManager.move()
1+
var someCoffee: Coffee = SimpleCoffee()
2+
println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredients())")
3+
someCoffee = Milk(decoratedCoffee: someCoffee)
4+
println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredients())")
5+
someCoffee = WhipCoffee(decoratedCoffee: someCoffee)
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println("Cost : \(someCoffee.getCost()); Ingredients: \(someCoffee.getIngredients())")

‎Design-Patterns.playground/section-44.swift

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class StepCounter {
2-
var totalSteps: Int = 0 {
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willSet(newTotalSteps) {
4-
println("About to set totalSteps to \(newTotalSteps)")
5-
}
6-
didSet {
7-
if totalSteps > oldValue {
8-
println("Added \(totalSteps - oldValue) steps")
9-
}
10-
}
1+
protocol FileOperationCommand {
2+
init(file: String)
3+
func execute()
4+
}
5+
6+
class FileMoveCommand : FileOperationCommand {
7+
let file:String
8+
required init(file: String) {
9+
self.file = file
10+
}
11+
12+
func execute() {
13+
print("\(file) moved")
14+
}
15+
}
16+
17+
class FileDeleteCommand : FileOperationCommand {
18+
let file:String
19+
required init(file: String) {
20+
self.file = file
21+
}
22+
23+
func execute() {
24+
print("\(file) deleted")
25+
}
26+
}
27+
28+
class FileManager {
29+
let deleteCommand: FileOperationCommand
30+
let moveCommand: FileOperationCommand
31+
32+
init(deleteCommand: FileDeleteCommand, moveCommand: FileMoveCommand) {
33+
self.deleteCommand = deleteCommand
34+
self.moveCommand = moveCommand
35+
}
36+
37+
func delete () {
38+
deleteCommand.execute()
39+
}
40+
41+
func move () {
42+
moveCommand.execute()
1143
}
1244
}

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