Generate all permutations of the given set

get-permutations.js

function getPermutations(set) {
    var result = [];
    permutate(set);
    return result;
    
    function permutate(set, subset) {
        if (!subset) subset = [];
        if (set && !set.length) {
            result.push(subset);
            return;
        }
        
        for (var i = 0; i < set.length; i++) {
            var newSet = set.slice(0, i).concat(set.slice(i + 1, set.length));
            var newSubset = subset.concat(set.slice(i, i + 1));
            permutate(newSet, newSubset);
        }
    }
}