Created
June 23, 2016 07:42
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| function compressString (str) { | |
| return (function compressAux(str, index, acc) { | |
| return index > str.length -1 ? | |
| '' : | |
| str.charAt(index) === str.charAt(index + 1) ? | |
| compressAux(str, ++index, ++acc) : | |
| str.charAt(index) + (acc !== 1 ? acc : '') + compressAux(str, ++index, 1); | |
| })(str, 0, 1); | |
| } | |
| compress("aaabbcccd"); // "a3b2c3d" |
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