Initial Commit

1 - Prelude/1 - GettingStarted.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

1 - Prelude/1 - GettingStarted.playground/section-1.swift

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+
+// Declaring Variables
+var myVariable = "I can change" // -> No more semicolons (unless you want multiple statements on one line)
+
+// Declaring Constants
+let myConstant = "I'm constant"
+// myConstant = "Try me" // -> Error: cannot reassign a constant
+
+// Notice we aren't declaring a type -> Type Inference
+// Try option + clicking a variable or constant to see its type
+
+// Specifying a Type
+let myString: String = "a string" // -> No Longer need @ prefix for strings
+let myInteger: Int = 100
+let myDouble: Double = 1.234
+let myBool: Bool = true
+let myArray: Array = ["string 1", "string 2"] // -> Infers contained types
+let myIntArray: [Int] = [1, 2]
+let myDictionary: Dictionary = ["key":"value"] // -> Infers contained types
+let myIntDictionary: [Int:Int] = [1:2, 3:4]
+
+// Variables and Constants in Swift cannot be nil
+// var nilVariable = nil // -> Error: cannot be nil
+// let nilConstant = nil
+
+// String Interpolation
+let stringWithVariable = "Look at me, \(myVariable)"
+
+// Concatenate Strings
+let twoStrings = "String 1 and " + "String 2"
+
+// Logging
+print(stringWithVariable)
+println(twoStrings) // -> Adds a newline, more commonly used
+
+// In Swift we access methods and properties with dot syntax
+twoStrings.isEmpty

1 - Prelude/1 - GettingStarted.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

1 - Prelude/2 - Strings.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

1 - Prelude/2 - Strings.playground/section-1.swift

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+// Playground - noun: a place where people can play
+
+import UIKit
+
+// We no longer need @
+let string1 = "Game Over"
+let string2 = " Man"
+// We can concatenate strings easily
+let combinedString = string1 + string2
+
+var quote = "Game Over ".stringByAppendingString("Man")
+quote += ", Game Over!"
+println(quote.capitalizedString)
+
+// String Interpolation
+let interpolatedString = "\(combinedString), Game Over!"

1 - Prelude/2 - Strings.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

1 - Prelude/3 - Numerics.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

1 - Prelude/3 - Numerics.playground/section-1.swift

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+// Playground - noun: a place where people can play
+
+import UIKit
+
+let crewMembers = 4     // Type Int
+let lightyearsAway = 1.234  // Type Double
+
+// Tip: Underscores can be used as thousands separator
+let aMillionCredits = 1000000
+let aCoolMillionCredits = 1_000_000
+
+// Arithmetic
+10 + 10 // Addition
+10 - 10 // Subtraction
+10 * 10 // Multiplication
+10 / 10 // Division
+10 % 10 // Remainder
+
+// Numeric conversions must be explicit
+
+let integer = 10
+let double = 1.234
+
+//let result = integer * double // Error: needs a type
+let doubleResult = Double(integer) * double
+let integerResult = integer * Int(double)
+
+// Compound Operations
+var compound = 10
+compound += 10  // compound = compound + 10
+compound -= 10
+compound *= 10
+compound /= 10
+compound %= 10
+
+// Unary Operations
+var unary = 10
+
+// Prefix
+++unary
+--unary
+
+// Postfix
+unary++
+unary--

1 - Prelude/3 - Numerics.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

1 - Prelude/4 - Booleans.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

1 - Prelude/4 - Booleans.playground/section-1.swift

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+// Playground - noun: a place where people can play
+
+import UIKit
+
+let theCake = false
+
+// Only accepts true/false
+let theCake = YES   // Error
+let theCake = TRUE  // Error
+
+// Only Booleans can be true/false
+var myString = "The Cake is a Lie"
+myString == true // Error
+if myString {
+    // Error
+}
+
+var myInt = 1
+myInt == true // Error

1 - Prelude/4 - Booleans.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

1 - Prelude/5 - Collections.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

1 - Prelude/5 - Collections.playground/section-1.swift

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+// Playground - noun: a place where people can play
+
+import UIKit
+
+// Arrays
+var characters = ["Luke Skywalker", "Anakin Skywalker"]
+characters[1] = "Darth Vader"
+
+// Easy concatenate
+let moreCharacters = ["C3PO", "R2D2"]
+characters += moreCharacters
+
+// Methods
+characters.append("Han Solo")
+characters.insert("Princess Leia", atIndex: 0)
+characters.removeAtIndex(1)
+
+characters.count
+characters.isEmpty
+characters.first
+characters.last
+
+// Dictionaries
+var professions = ["Boba Fett": "Bounty Hunter", "Han Solo": "Smuggler"]
+
+// Access with key
+professions["Han Solo"]
+
+// Add with key
+professions["Darth Vader"] = "Sith Lord"
+
+// Methods
+professions.removeValueForKey("Han Solo")
+professions.updateValue("Boba Fett", forKey: "Sarlac Food")
+
+professions.count
+professions.isEmpty

1 - Prelude/5 - Collections.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>

1 - Prelude/6 - ControlFlow.playground/contents.xcplayground

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<playground version='3.0' sdk='iphonesimulator'>
+    <sections>
+        <code source-file-name='section-1.swift'/>
+    </sections>
+    <timeline fileName='timeline.xctimeline'/>
+</playground>

1 - Prelude/6 - ControlFlow.playground/section-1.swift

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+// Playground - noun: a place where people can play
+
+import UIKit
+
+// Loops
+for i in 1...3 {
+    println("O'doyle Rules")
+}
+
+var range = Range(start: 1, end: 4)
+
+var i = 0
+while i < 5 {
+    println("O'doyle Rules")
+    i++
+}
+
+let oceans = ["George Clooney", "Brad Pitt", "Matt Damon"]
+
+for actor in oceans {
+    println(actor)
+    i++
+}
+
+// If/else
+let enemyType = "Aliens"
+
+if enemyType == "Wraith" {
+    println("Use Fire")
+} else if enemyType == "Werewolf" {
+    println("Use Silver")
+} else {
+    println("Nuke it from orbit")
+}
+
+// Comparison Operators
+// ==  equal
+// !=  not equal
+// >   greater than
+// <   less than
+// >=  greater or equal
+// <=  less or equal
+
+// Logical Operators
+// !    Not (invert)
+// &&   And
+// ||   Or
+
+// Switches
+let hero = "Thor"
+
+switch hero {
+case "Thor":
+    println("Asguard")
+case "Iron Man", "Captain America":
+    println("New York, NY")
+case "Hawkeye":
+    println("Waverly, Iowa")
+default:
+    println("Unknown")
+}

1 - Prelude/6 - ControlFlow.playground/timeline.xctimeline

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+<?xml version="1.0" encoding="UTF-8"?>
+<Timeline
+   version = "3.0">
+   <TimelineItems>
+   </TimelineItems>
+</Timeline>