Created
September 26, 2015 08:25
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import scala.annotation.tailrec | |
def atoi(chList:List[String]):Int = { | |
@tailrec | |
def atoiAccumulator(chList: List[String], accumulator: Int): Int = chList match { | |
case Nil => accumulator | |
case head :: tail => | |
val tensMult = scala.math.pow(10, tail.length).toInt | |
val nxtAccumulator = (head.toInt * tensMult) + accumulator | |
atoiAccumulator(tail, nxtAccumulator) | |
} | |
atoiAccumulator(chList, 0) | |
} | |
val tst1 = atoi(List("1","3","5", "7","2","9")) | |
assert(tst1 == 135729, "Error in atoi") | |
val tst2 = atoi(List("4","2","8", "7","1","9")) | |
assert(tst2 == 428719, "Error in atoi") | |
val tst3 = atoi(List("0","2","8", "7","1","9")) | |
assert(tst3 == 28719, "Error in atoi") |
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