Permutate

function Permutate(Combos, Target) {
    var Result = [];

    if(typeof Target !== "number") Target = Number(Target.toString());

    function SubPerm(i, t) {
        var s = t.reduce(function(a, b){
            return a + b;
        }, 0);

        if (Target === s) return Result.push(t);
        if (s > Target || i === Combos.length) return;

        SubPerm(i, t.concat([Combos[i]]));
        SubPerm(i + 1, t);
    }

    SubPerm(0, []);

    return Result;
}