My Solution for Functional Kubs' katas of August 2018

functional_kubs_august18.kt

package functionalkubs


/**
 * Implement part 1 of http://adventofcode.com/2017/day/1.
 * See https://github.com/raphait/kotlin-functional-kubs for instructions.
 */
object Part1 {

    fun captcha(input: String): Int {
        return getArrayOfDoubleDigit(numberToArray(input)).sum()
    }

    fun numberToArray(numString: String): List<Int> {
        return numString.split("").filter{!it.isBlank()}.map{it.toInt()}
    }

    fun getArrayOfDoubleDigit(originalArray: List<Int>): List<Int> {
        return originalArray.filterIndexed { index, value -> originalArray[(index + 1) % originalArray.size] == value }
    }
}

/**
 * Implement part 2 of http://adventofcode.com/2017/day/1.
 * See https://github.com/raphait/kotlin-functional-kubs for instructions.
 */
object Part2 {
    fun captcha(input: String): Int {
        return getArrayOfDoubleDigit(numberToArray(input)).sum()
    }

    fun numberToArray(numString: String): List<Int> {
        return numString.split("").filter{!it.isBlank()}.map{it.toInt()}
    }

    fun getArrayOfDoubleDigit(originalArray: List<Int>): List<Int> {
        return originalArray.filterIndexed { index, value -> originalArray[(index + (originalArray.size / 2)) % originalArray.size] == value }
    }
}