16 lines
440 B
Swift
16 lines
440 B
Swift
// "3W1B2W" -> "WWWBWW"
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func decode(encoded: String) -> String {
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let scanner = NSScanner(string: encoded)
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var char: NSString? = nil
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var count: Int = 0
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var out = ""
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while scanner.scanInteger(&count) {
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while scanner.scanCharactersFromSet(NSCharacterSet.letterCharacterSet(), intoString: &char) {
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out += String(count: count, repeatedValue: Character(char as! String))
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}
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}
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return out
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}
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