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-2.2.1.42	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.41	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.40	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.39	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.38	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.37	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.36	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.35	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.34	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.33	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.32	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.31	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.30	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.29	tracks/kotlin/exercises/pascals-triangle/.meta/src/reference/kotlin/PascalsTriangle.kt
trackler-2.2.1.28	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.27	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.26	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.25	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.24	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt
trackler-2.2.1.23	tracks/kotlin/exercises/pascals-triangle/src/example/kotlin/PascalsTriangle.kt