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    @extra-array/permutations
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    2.10.19 • Public • Published

    Lists all possible permutations. 📦 😺 🏃 📼 🌔 📜 📰 📘

    Similar: permutation, permutations, hasPermutation.

    This is part of package extra-array.


    array.permutations(x, [n]);
    // x: an array
    // n: number of values (-1 => any)
    const array = require("extra-array");
    
    [...array.permutations([1, 2])];
    // [ [], [ 1 ], [ 2 ], [ 1, 2 ], [ 2, 1 ] ]
    
    [...array.permutations([1, 2, 3])];
    // [
    //   [],          [ 1 ],
    //   [ 2 ],       [ 3 ],
    //   [ 1, 2 ],    [ 1, 3 ],
    //   [ 2, 1 ],    [ 2, 3 ],
    //   [ 3, 1 ],    [ 3, 2 ],
    //   [ 1, 2, 3 ], [ 1, 3, 2 ],
    //   [ 2, 1, 3 ], [ 2, 3, 1 ],
    //   [ 3, 1, 2 ], [ 3, 2, 1 ]
    // ]
    
    [...array.permutations([1, 2, 3], 2)];
    // [ [ 1, 2 ], [ 1, 3 ], [ 2, 1 ], [ 2, 3 ], [ 3, 1 ], [ 3, 2 ] ]


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