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字符串分隔:
var str_componets = "I would prefer a face-to-face talk with my friends" str_componets.componentsSeparatedByCharactersInSet(NSCharacterSet(charactersInString: " -")) 这样，str_componets分成了： ["I", "would", "prefer", "a", "face", "to", "face", "talk", "with", "my", "friends"]
swift语言的数组提供了一个map函数很好用！
可建立一个a数组的映射数组b，即数学上的 y = f(x)
func fx(x : Int){ reurn x + 10 } var a = [1, 2, 3, 4, 5] var b = a.map(fx) println(b) // [11, 12, 13, 14, 15]
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原文地址：http://www.cnblogs.com/ericjun/p/4292569.html
