1.和之前一样
2.代码
1 // 2 // ViewController.swift 3 // SwitfLesson_exam 4 // 5 // Created by 薛雨仑 on 14-10-7. 6 // Copyright (c) 2014年 Dylan. All rights reserved. 7 // 8 9 import UIKit 10 11 class ViewController: UIViewController { 12 13 override func viewDidLoad() { 14 super.viewDidLoad() 15 16 // 1. 17 // Change Two temper 18 // 2种元组的初始化 19 var a = "Alice" 20 var b = "Dylan" 21 var myType = (a, b) 22 23 var name:String 24 var family:String 25 (name, family) = ("Alice", "Dylan") 26 27 // test func change 28 swap(&a, with: &b) 29 println(a) 30 println(b) 31 32 // 2. 33 // print String 34 // test func flexString 35 println(flexStrings(s1:"Alice ", s2: "Dylan")) 36 37 // 3. 38 // sumAny 39 // test func sumAny 40 println(sumAny(1, 2, 3)) 41 42 // 4. 43 // countFrom 44 // test func countFrom 45 countFrom(from: 1, to: 5) 46 } 47 48 /** 49 1. fun change 50 交换2个任意对象的值 51 */ 52 func swap<T>(inout a:T, inout with b:T) { 53 (a, b) = (b, a) 54 } 55 56 /** 57 2. func flexStrings 58 输出字符串 59 */ 60 func flexStrings(s1:String = "", s2:String = "") ->String { 61 return s1 + s2 == "" ? "none" : s1+s2 62 } 63 64 /** 65 3. func sumAny 66 */ 67 func sumAny(anys: Any...) ->String { 68 return String( 69 (anys.map({item in 70 switch item { 71 case "" as String, 0 as Int: 72 return -10 73 case let s as String where s.toInt() > 0: 74 return s.toInt()! 75 case is Int: 76 return item as Int 77 default: 78 return 0 79 } 80 }) as [Int]).reduce(0, combine: { 81 $0 + $1 82 }) 83 ) 84 } 85 86 /** 87 4. func countFrom 88 */ 89 func countFrom(#from: Int, to:Int) { 90 println(from) 91 if from < to { 92 countFrom(from: from + 1, to: to) 93 } 94 } 95 96 override func didReceiveMemoryWarning() { 97 super.didReceiveMemoryWarning() 98 // Dispose of any resources that can be recreated. 99 } 100 101 102 }