jjacobson93

function () {
	if (!this.$sizingHeader) return;

	this.$element.prepend(this.$sizingHeader);

	var $sizingCells = this.$sizingHeader.find('th');
	var columnCount = $sizingCells.length;
	var tableWidth = $sizingCells.parent().width(); // Used to calculate the width percent

	function matchSizingCellWidth(i, el) {

jjacobson93

func giveMeAStringMaybe(_ maybe: Bool) -> String? {
    return maybe ? "Yes!" : nil
}

let str: String? = giveMeAStringMaybe(true)
if let unwrappedStr = str {
    print(unwrappedStr is String) // prints: true
    print(unwrappedStr) // prints: "Yes!"
} else {
    print(str) // prints: nil

jjacobson93

func giveMeAStringMaybe(_ maybe: Bool) -> String? {
    return maybe ? "Yes!" : nil
}

let str: String? = giveMeAStringMaybe(true)
guard let unwrappedStr = str else {
    print("str is nil")
    // unwrappedStr is NOT accessible here
    return
}

jjacobson93

func giveMeAStringMaybe(_ maybe: Bool) -> String? {
    return maybe ? "Yes!" : nil
}

let str1: String? = giveMeAStringMaybe(true)
let lowercaseStr1: String? = str1?.lowercased()
print(lowercaseStr2) // prints: "yes!"

let str2: String? = giveMeAStringMaybe(false)
let lowercaseStr2: String? = str2?.lowercased()

jjacobson93

let moveAction = SKAction.moveBy(x: 10, y: -15, duration: 0.8)

jjacobson93

let moveAction = SKAction.moveBy(x: 10, y: -15, duration: 0.8)
let player = SKSpriteNode(imageNamed: "player.png")
player.run(moveAction)

jjacobson93

let moveAction = SKAction.moveBy(x: 10, y: -15, duration: 0.8)
let rotateAction = SKAction.rotate(byAngle: π, duration: 0.5)
let moveAndRotate = SKAction.group([moveAction, rotateAction])
let player = SKSpriteNode(imageNamed: "player.png")
player.run(moveAndRotate)

jjacobson93

let moveAction = SKAction.moveBy(x: 10, y: -15, duration: 0.8)
let player = SKSpriteNode(imageNamed: "player.png")
let moveFiveTimes = SKAction.repeat(moveAction, count: 5)
player.run(moveFiveTimes)

jjacobson93

let coin = SKSpriteNode(imageNamed: "coin.png")
let animate = SKAction.rotate(byAngle: π/2, duration: 0.75) 
let updateScore = SKAction.run {
    scoreValue += 10   
}
let sequence = SKAction.sequence([animate, updateScore])
coin.run(sequence)

jjacobson93

let updateTimeLabel = SKAction.customAction(withDuration: 5) {
    (node, elapsedTime) in
    if let label = node as? SKLabelNode {
        label.text = "\(elapsedTime)s"   
    }
}

let timeLabel = SKLabelNode(fontNamed: "Chalkduster")
timeLabel.text = "0s"
timeLabel.run(updateTimeLabel)