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-2.2.1.62	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.61	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.60	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.59	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.58	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.57	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.56	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.55	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.54	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.53	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.52	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.51	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.50	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.49	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.48	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.47	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.46	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.45	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.44	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.43	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt