Created
July 7, 2014 06:47
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| extension String { | |
| func getUnicodeIndex()->Int { | |
| return Int(self.unicodeScalars[self.unicodeScalars.startIndex].value) | |
| } | |
| static func getUnicodeRangeFrom(from:Int, to:Int, closedRange:Bool)->String { | |
| let step = from > to ? -1 : 1; | |
| let final = closedRange ? to + step : to | |
| let chars = Int[]((from..final).by(step)).map{String(UnicodeScalar($0))} | |
| return "".join(chars) | |
| } | |
| } | |
| @infix func .. (left: String, right: String) -> String { | |
| return String.getUnicodeRangeFrom( | |
| left.getUnicodeIndex(), | |
| to:right.getUnicodeIndex(), | |
| closedRange:false) | |
| } | |
| @infix func ... (left: String, right: String) -> String { | |
| return String.getUnicodeRangeFrom( | |
| left.getUnicodeIndex(), | |
| to:right.getUnicodeIndex(), | |
| closedRange:true) | |
| } | |
| let s1 = "三".."丏" // "三上下丌不与" | |
| let s2 = "z"..."j" // "zyxwvutsrqponmlkj" |
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