Permutation Need Help To Code

Thank for your reply, first thing i wish to thank you for trying to help me out, and i have post this in few website also no one trying to help at all. For my code, what i wish to

Solution 1:

It's not that hard, I guess. It's just the standard permutation thing. You'll need to use a little recursion:

function permute(size) {
    var range = getRange(size);
    var result = [];
    getSubPerms('', range, result);
    return result;
};

function getRange(size) {
    var range = [];
    for (var i = 0; i < size; i++) {
        range.push(i + 1);
    }
    return range;
}

function getSubPerms(perm, range, result) {
    for (var i = 0; i < range.length; i++) {
        var perm2 = perm + range[i];
        if (perm2.length == range.length) {
            result.push(perm2);
        } else {
            getSubPerms(perm2, range, result);
        }
    }
}

var foo = permute(4); //an array of all of your results.
alert(foo.length); //256

However, if you're only interested in the length of that, without having to generate the results, it would simply be Math.pow(size, size) to get the length of your results.