Master

10. Properties.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>

10. Properties.playground/section-1.swift

@@ -1,4 +1,5 @@
 // ------------------------------------------------------------------------------------------------
+// Checked September 2016
 // Things to know:
 //
 // * Properties store values in classes, structures and enumerations.

10. Properties.playground/timeline.xctimeline

@@ -3,7 +3,9 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=10176&amp;EndingColumnNumber=5&amp;EndingLineNumber=2&amp;StartingColumnNumber=4&amp;StartingLineNumber=2&amp;Timestamp=429121248.87547">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=10202&amp;EndingColumnNumber=5&amp;EndingLineNumber=3&amp;StartingColumnNumber=4&amp;StartingLineNumber=3&amp;Timestamp=496707723.358648"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>

11. Methods.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>

11. Methods.playground/section-1.swift

@@ -1,4 +1,5 @@
 // ------------------------------------------------------------------------------------------------
+// Checked and updated September 2016
 // Things to know:
 //
 // * Methods can be in the form of Instance Methods, which apply to a given instance of a class
@@ -45,7 +46,7 @@ class Counter
 	// No parameters
 	func increment()
 	{
-		count++
+		count += 1
 	}
 
 	// One parameter, no external parameter name needed by caller
@@ -80,7 +81,7 @@ class Counter
 	// Two parameters. Using the external parameter shorthand ("#") to force caller to use
 	// external parameter name on first parameter and defaulting to shared local/external names
 	// for the rest.
-	func addTwiceWithExternalSpecified2(#first: Int, second: Int)
+	func addTwiceWithExternalSpecified2(first: Int, second: Int)
 	{
 		count += first
 		count += second
@@ -97,12 +98,12 @@ class Counter
 // Now let's see how we call each of those functions
 var counter = Counter()
 counter.increment()
-counter.incrementBy(4)
+counter.incrementBy(amount: 4)
 counter.addValueTo(value: 4)
-counter.addTwiceWithExternalImplied(50, second: 4)
+counter.addTwiceWithExternalImplied(first: 50, second: 4)
 counter.addTwiceWithExternalSpecified(a: 50, b: 4)
 counter.addTwiceWithExternalSpecified2(first: 10, second: 10)
-counter.addTwiceWithExternalSpecified3(10, 10)
+counter.addTwiceWithExternalSpecified3(first: 10, 10)
 counter.count
 
 // The 'self' property refers to the current instance of a class, structure or enumeration. For
@@ -160,17 +161,17 @@ struct Point3
 // enumeration:
 enum TriStateSwitch
 {
-	case Off, Low, High
+	case off, low, high
 	mutating func next()
 	{
 		switch self
 		{
-		case Off:
-			self = Low
-		case Low:
-			self = High
-		case High:
-			self = Off
+		case .off:
+			self = .low
+		case .low:
+			self = .high
+		case .high:
+			self = .off
 		}
 	}
 }
@@ -199,7 +200,7 @@ struct LevelTracker
 	}
 	mutating func advanceToLevel(level: Int) -> Bool
 	{
-		if LevelTracker.levelIsUnlocked(level)
+		if LevelTracker.levelIsUnlocked(level: level)
 		{
 			currentLevel = level
 			return true
@@ -212,7 +213,7 @@ struct LevelTracker
 }
 
 // To call a type method, use the type name, not the instance name:
-LevelTracker.levelIsUnlocked(3)
+LevelTracker.levelIsUnlocked(level: 3)
 
 // If we attempt to use an instance to call a type method, we'll get an error
 var levelTracker = LevelTracker()
@@ -231,4 +232,4 @@ class SomeOtherClass
 }
 
 // We call class type methods with the type name just as we do for structures and enumerations:
-SomeOtherClass.isGreaterThan100(105)
+SomeOtherClass.isGreaterThan100(value: 105)

11. Methods.playground/timeline.xctimeline

@@ -3,7 +3,9 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=6306&amp;EndingColumnNumber=5&amp;EndingLineNumber=8&amp;StartingColumnNumber=4&amp;StartingLineNumber=8&amp;Timestamp=424368474.022727">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=6395&amp;EndingColumnNumber=5&amp;EndingLineNumber=9&amp;StartingColumnNumber=4&amp;StartingLineNumber=9&amp;Timestamp=496707947.258279"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>

13. Inheritance.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>

13. Inheritance.playground/section-1.swift

@@ -1,4 +1,5 @@
 // ------------------------------------------------------------------------------------------------
+// Checked September 2016
 // Things to know:
 //
 // * There is no default base class for Swift objects. Any class that doesn't derive from

13. Inheritance.playground/timeline.xctimeline

@@ -3,7 +3,9 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=4430&amp;EndingColumnNumber=5&amp;EndingLineNumber=7&amp;StartingColumnNumber=4&amp;StartingLineNumber=7&amp;Timestamp=429121270.152136">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=4456&amp;EndingColumnNumber=5&amp;EndingLineNumber=8&amp;StartingColumnNumber=4&amp;StartingLineNumber=8&amp;Timestamp=496755665.442609"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>

14a. Initialization.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>

14a. Initialization.playground/section-1.swift

@@ -1,4 +1,5 @@
 // ------------------------------------------------------------------------------------------------
+// Checked and updated September 2016
 // Things to know:
 //
 // * Swift provides an initializer (which partially resembles a function) to ensure that every
@@ -67,7 +68,7 @@ let freezingPointOfWater = Celsius(kelvin: 273.15)
 // name generation and one that opts out:
 struct Color
 {
-	let red = 0.0, green = 0.0, blue = 0.0
+	var red = 0.0, green = 0.0, blue = 0.0
 
 	// This initializer will make use of automatically generated exernal names
 	init(red: Double, green: Double, blue: Double)
@@ -116,7 +117,7 @@ class SurveyQuestion
 class SurveyQuestion2
 {
 	// Default value of "No question"
-	let text: String = "No question"
+	var text: String = "No question"
 
 	var response: String?
 

14a. Initialization.playground/timeline.xctimeline

@@ -3,7 +3,9 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=7144&amp;EndingColumnNumber=5&amp;EndingLineNumber=9&amp;StartingColumnNumber=4&amp;StartingLineNumber=9&amp;Timestamp=424377229.524799">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=7182&amp;EndingColumnNumber=5&amp;EndingLineNumber=10&amp;StartingColumnNumber=4&amp;StartingLineNumber=10&amp;Timestamp=496755767.283091"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>

14b. Initializer Chaining.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>

14b. Initializer Chaining.playground/section-1.swift

@@ -1,4 +1,5 @@
 // ------------------------------------------------------------------------------------------------
+// Checked and updated September 2016
 // Things to know:
 //
 // * Initializer Chaining refers to the way in which initialization takes place along the class
@@ -190,5 +191,5 @@ struct CheckerBoard
 
 // We can now check our work
 var board = CheckerBoard()
-board.squareIsBlackAtRow(1, column: 1) // Should be false
-board.squareIsBlackAtRow(1, column: 2) // Should be true
+board.squareIsBlackAtRow(row: 1, column: 1) // Should be false
+board.squareIsBlackAtRow(row: 1, column: 2) // Should be true

14b. Initializer Chaining.playground/timeline.xctimeline

@@ -3,7 +3,9 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=7452&amp;EndingColumnNumber=5&amp;EndingLineNumber=26&amp;StartingColumnNumber=4&amp;StartingLineNumber=26&amp;Timestamp=429121086.671912">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=7500&amp;EndingColumnNumber=5&amp;EndingLineNumber=27&amp;StartingColumnNumber=4&amp;StartingLineNumber=27&amp;Timestamp=496755871.982254"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>

15. Deinitialization.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>

15. Deinitialization.playground/section-1.swift

@@ -1,4 +1,5 @@
 // ------------------------------------------------------------------------------------------------
+// Checked and updated September 2016
 // Things to know:
 //
 // * Deinitializers are called automatically before a class instance is
@@ -17,9 +18,10 @@
 struct Bank
 {
 	static var coinsInBank = 10_000
-	static func vendCoins(var numberOfCoinsToVend: Int) -> Int
-	{
-		numberOfCoinsToVend = min(numberOfCoinsToVend, coinsInBank)
+  static func vendCoins(numberOfCoinsToVend: Int) -> Int
+  {
+    var numberOfCoinsToVend = numberOfCoinsToVend
+    numberOfCoinsToVend = min(numberOfCoinsToVend, coinsInBank)
 		coinsInBank -= numberOfCoinsToVend
 		return numberOfCoinsToVend
 	}
@@ -36,7 +38,7 @@ class Player
 
 	init(coins: Int)
 	{
-		coinsInPurse = Bank.vendCoins(coins)
+		coinsInPurse = Bank.vendCoins(numberOfCoinsToVend: coins)
 	}
 
 	func winCoins(coins: Int)
@@ -46,7 +48,7 @@ class Player
 
 	deinit
 	{
-		Bank.receiveCoins(coinsInPurse)
+		Bank.receiveCoins(coins: coinsInPurse)
 	}
 }
 
@@ -57,7 +59,7 @@ playerOne!.coinsInPurse
 Bank.coinsInBank
 
 // The Player now wins 2000 coins!
-playerOne!.winCoins(2_000)
+playerOne!.winCoins(coins: 2_000)
 playerOne!.coinsInPurse
 Bank.coinsInBank
 

15. Deinitialization.playground/timeline.xctimeline

@@ -3,7 +3,9 @@
    version = "3.0">
    <TimelineItems>
       <LoggerValueHistoryTimelineItem
-         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=1921&amp;EndingColumnNumber=5&amp;EndingLineNumber=1&amp;StartingColumnNumber=4&amp;StartingLineNumber=1&amp;Timestamp=424365502.348442">
+         documentLocation = "#CharacterRangeLen=0&amp;CharacterRangeLoc=2044&amp;EndingColumnNumber=5&amp;EndingLineNumber=2&amp;StartingColumnNumber=4&amp;StartingLineNumber=1&amp;Timestamp=496756034.689658"
+         selectedRepresentationIndex = "0"
+         shouldTrackSuperviewWidth = "NO">
       </LoggerValueHistoryTimelineItem>
    </TimelineItems>
 </Timeline>

18. Type Casting.playground/contents.xcplayground

@@ -4,4 +4,4 @@
         <code source-file-name='section-1.swift'/>
     </sections>
     <timeline fileName='timeline.xctimeline'/>
-</playground>
+</playground>