Contents

import java.math.BigInteger

private const val SQUARE_COUNT = 64
private const val INVALID_SQUARE_NUMBER_MESSAGE = "Only integers between 1 and $SQUARE_COUNT (inclusive) are allowed"

object Board {

    fun getGrainCountForSquare(number: Int): BigInteger {
        require(number > 0)             { INVALID_SQUARE_NUMBER_MESSAGE }
        require(number <= SQUARE_COUNT) { INVALID_SQUARE_NUMBER_MESSAGE }

        return BigInteger.valueOf(2).pow(number - 1)
    }

    fun getTotalGrainCount(): BigInteger {
        return (1..SQUARE_COUNT)
            .map { getGrainCountForSquare(it) }
            .reduce { i1, i2 -> i1.add(i2) }
    }

}

Version data entries

188 entries across 188 versions & 1 rubygems

Version	Path
trackler-2.2.1.38	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.37	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.36	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.35	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.34	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.33	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.32	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.31	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.30	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.29	tracks/kotlin/exercises/grains/.meta/src/reference/kotlin/Board.kt
trackler-2.2.1.28	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.27	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.26	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.25	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.24	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.23	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.22	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.21	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.20	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt
trackler-2.2.1.19	tracks/kotlin/exercises/grains/src/example/kotlin/Board.kt