{
    "cells": [
        {
            "cell_type": "markdown",
            "metadata": {},
            "source": ["# Pascal's Triangle\n", "\n", "Compute Pascal's triangle up to a given number of rows.\n", "\n", "In Pascal's Triangle each number is computed by adding the numbers to\n", "the right and left of the current position in the previous row.\n", "\n", "```text\n", "    1\n", "   1 1\n", "  1 2 1\n", " 1 3 3 1\n", "1 4 6 4 1\n", "# ... etc\n", "```\n", "\n", "## Source\n", "\n", "Pascal's Triangle at Wolfram Math World [http://mathworld.wolfram.com/PascalsTriangle.html](http://mathworld.wolfram.com/PascalsTriangle.html)\n", "\n", "## Version compatibility\n", "This exercise has been tested on Julia versions >=1.0.\n", "\n", "## Submitting Incomplete Solutions\n", "It's possible to submit an incomplete solution so you can see how others have completed the exercise."]
        },
        {
            "cell_type": "markdown",
            "metadata": {},
            "source": ["## Your solution"]
        },
        {
            "cell_type": "code",
            "execution_count": null,
            "metadata": {},
            "outputs": [],
            "source": ["# submit\n", "function triangle(n)\n", "\n", "end"]
        },
        {
            "cell_type": "markdown",
            "metadata": {},
            "source": ["## Test suite"]
        },
        {
            "cell_type": "code",
            "execution_count": null,
            "metadata": {},
            "outputs": [],
            "source": ["using Test\n", "\n", "# include(\"pascals-triangle.jl\")\n", "\n", "const rows = [[1], [1, 1], [1, 2, 1], [1, 3, 3, 1], [1, 4, 6, 4, 1], [1, 5, 10, 10, 5, 1], [1, 6, 15, 20, 15, 6, 1], [1, 7, 21, 35, 35, 21, 7, 1], [1, 8, 28, 56, 70, 56, 28, 8, 1], [1, 9, 36, 84, 126, 126, 84, 36, 9, 1]]\n", "\n", "@testset \"$i row(s)\" for i in eachindex(rows)\n", "    @test triangle(i) == @view rows[1:i]\n", "end\n", "\n", "@testset \"special cases\" begin\n", "    @test_throws DomainError triangle(-1)\n", "    @test isempty(triangle(0))\n", "end"]
        },
        {
            "cell_type": "markdown",
            "metadata": {},
            "source": [
                "## Prepare submission\n",
                "To submit your exercise, you need to save your solution in a file called `pascals-triangle.jl` before using the CLI.\n",
                "You can either create it manually or use the following functions, which will automatically write every notebook cell that starts with `# submit` to the file `pascals-triangle.jl`.\n"
            ]
        },
        {
            "cell_type": "code",
            "execution_count": null,
            "metadata": {},
            "outputs": [],
            "source": [
                "# using Pkg; Pkg.add(\"Exercism\")\n",
                "# using Exercism\n",
                "# Exercism.create_submission(\"pascals-triangle\")"
            ]
        }
    ],
    "metadata": {
        "kernelspec": {
            "display_name": "Julia 1.3.0",
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            "file_extension": ".jl",
            "mimetype": "application/julia",
            "name": "julia",
            "version": "1.3.0"
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    "nbformat_minor": 2
}