/* == ===运算符 */ var a: NSString = "abc",b = a,c: NSString = "abc" println(a == b) //true println(a == c) //true println(a === b) //true println(a === c) //false === 运算符可以判断是否对同一对象的引用 /* 三元运算符 */ var result: Bool = false let f = result ? 0: "100" //三元运算符来赋值的时候 可以赋予不同类型数据 println(f) /* is 对类型的判断 */ var str: NSString = "a" println((str is NSMutableString)) /* [Any] [AnyObject] */ class people { init() { } init(width: Int,height: Int) { } var age = 10 } //[Any] 任何类型的数组(包括标准类型,构造体) var ca: [Any] = ["a","a",CGSize(width: 100,height: 100),people()] //[AnyObject] 任何非标准类型的数组(不包括包括标准类型,构造体) var obj: [AnyObject] = [people(width: 100,people()]