Simple LookAndSay Algorithm

LookAndSay.kt

// 0 is the first line from the lookAndSay result.
fun ant(line: Int): String {
    var resultString = "1"
    var lineCounter = line

    while (lineCounter-- > 0) {
        var tempBuffer = StringBuilder()
        var curCompareChar = resultString[0]
        var curCnt = 1
        for (idx in 1..resultString.length - 1) {
            if (curCompareChar == resultString[idx]) {
                curCnt++
            } else {
                tempBuffer.append(curCompareChar).append(curCnt)
                curCompareChar = resultString[idx]
                curCnt = 1
            }
        }
        tempBuffer.append(curCompareChar).append(curCnt)
        resultString = tempBuffer.toString()
    }

    return resultString
}