JavaScript functions that remove duplicates from an array

array-removedupes.js

var RemoveDuplicates = (function () {
    "use strict";

    var inPlace, getCopy;

    inPlace = function (arr) {
        var i, j, cur, found;
        for (i = arr.length - 1; i >= 0; i--) {
            cur = arr[i];
            found = false;
            for (j = i - 1; !found && j >= 0; j--) {
                if (cur === arr[j]) {
                    if (i !== j) {
                        arr.splice(i, 1);
                    }
                    found = true;
                }
            }
        }
        return arr;
    };

    getCopy = function (arr) {
        var ret, len, i, j, cur, found;
        ret = [];
        len = arr.length;
        for (i = 0; i < len; i++) {
            cur = arr[i];
            found = false;
            for (j = 0; !found && (j < len); j++) {
                if (cur === arr[j]) {
                    if (i === j) {
                        ret.push(cur);
                    }
                    found = true;
                }
            }
        }
        return ret;
    };

    return {
        inPlace: inPlace,
        getCopy: getCopy
    };
}());