This is our first episode learning the new language from Apple, Swift.
This week we take a quick look at the new playground and some language basics like constants, variables, variable types, condition statements, loops, while, switch/case, functions, nested functions, functions as arguments and more.
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var str = "Hello, playground" let goodbye = "Goodbye everyone" str = "later" var number: Double = 5 let label = "Today is the " let dayNumber = 3 let dayDescription = label + String(dayNumber) let cars = 35 let trucks = 7 let carSummary = "I Have \(cars) Cars On My Lot" let otSummary = "I Have \(cars + trucks) total vehicles on my Lot" var colorArray = ["Red", "Green", "Blue", "Yellow", "Pink"] colorArray[4] colorArray[4] = "Cyan" colorArray[4] var friendList = [ "Michelle": "DOL-BLS", "Mike": "Mechanic" ] friendList["Jackie"] = "Enterprise Security" for (friendName, FriendOccupation) in friendList { if friendName == "Jackie" { friendName } else { FriendOccupation } } for var l=0; l<10; ++l { l } for l in 0..20 { l } var n: Int = 2 while n < 100 { n = n * 2 } n = 2 do { n = n * 2 } while n < 100 let vegetable = "red pepper" switch vegetable { case "celery": let veggie = "You are eating crunchy celery" case "cucumber", "Watermellon": let veggie = "You are eating juicy" case let x where x.hasSuffix("pepper"): let veggie = "Is is a spicy \(x)?" default: let veggie = "Everything is good in soup" } func theHello(name: String, dayToday: String) ->String { return "Hello \(name), how is yout \(dayToday) going?" } theHello("Brian", "Wednesday") func getTemperatures() -> (Double, Double, Double) { return (75.5, 81, 53) } getTemperatures() func addTogether(numbers: Int...) -> Int { var sum: Int = 0 for number in numbers { sum += number } return sum } addTogether(25,11,28) addTogether(25,11,28,75,92,36) func addNested(addValue: Int) -> Int { var y = 10 func add() { y += addValue } add() return y } addNested(50) func grade(score: Int) -> String { switch score { case 93..100: return "A" case 86..92: return "B" case 79..86: return "C" default: return "F" } } func swingGrade(score: Int) -> String { switch score { case 90..100: return "A" case 80..89: return "B" case 70..79: return "C" default: return "F" } } func setGrade(score: Int, grade: Int -> String) -> String { return grade(score) } setGrade(90, grade) var numbers = [12, 7, 10, 25, 35] numbers numbers.map({ (number: Int) -> Int in let result = 3 * number if result % 2 == 0 { return 0 } else { return result } }) numbers