Contents

object PascalsTriangle {

    fun computeTriangle(rows: Int): List<List<Int>> {
        require(rows >= 0, { "Rows can't be negative!" })

        if (rows == 0) return emptyList()
        return (1..rows).map { buildTriangleRow(it) }
    }

    private fun buildTriangleRow(row: Int): List<Int> {
        var m = 1
        return listOf(1) + (1..row - 1).map { col ->
            m = m * (row - col) / col
            return@map m
        }
    }
}

Version data entries

280 entries across 280 versions & 1 rubygems

Version	Path
trackler-2.2.1.22	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.21	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.20	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.19	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.18	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.17	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.16	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.15	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.14	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.13	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.12	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.11	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.10	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.9	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.8	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.7	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.6	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.5	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.4	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.3	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt