Javascript: Remove an item from an array

I need to remove a specific item from a Javascript array. I'm sure there are lot of ways to do it, but this is a quicky function I came up with to do it.

// Loop through an array removing any matching items
function remove_item_from_array(needle, haystack) {
    var ret = [];

    for (i in haystack) {
        var item = haystack[i];

        if (item !== needle) {

    return ret;
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