###字符串
-
使用
countElements
函数来统计字符串中字符的个数let message = "hello, world!" println("message has \(countElements(message)) characters"
-
前缀和后缀:
hasPrefix
hasSuffix
var act1SceneCount = 0 for scene in romeoAndJuliet { if scene.hasPrefix("Act 1") { ++act1SceneCount } }
###字符
-
声明字符
let yenSign: Character = "$"
-
你可以通过
+
直接合并字符串和字符