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-2.0.0.9	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.8	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.7	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.6	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.5	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.4	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.3	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.2	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.1	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.0.0.0	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.4.1	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.4.0	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.3.0	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.2.1	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.2.0	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.1.2	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.1.1	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.1.0	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.0.1	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-1.0.0	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt