Function: usort version 76

Function:
Description: Sort an array by values using a user-defined comparison function.
Version:
Status: latest
Date: 2011-12-20 04:42
Summary: Import from phpjs.
Programmer: jj5
Code
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function usort (inputArr, sorter) {
    // http://jsphp.co/jsphp/fn/view/usort
    // +   original by: Brett Zamir (http://brett-zamir.me)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: This function deviates from PHP in returning a copy of the array instead
    // %        note 1: of acting by reference and returning true; this was necessary because
    // %        note 1: IE does not allow deleting and re-adding of properties without caching
    // %        note 1: of property position; you can set the ini of "phpjs.strictForIn" to true to
    // %        note 1: get the PHP behavior, but use this only if you are in an environment
    // %        note 1: such as Firefox extensions where for-in iteration order is fixed and true
    // %        note 1: property deletion is supported. Note that we intend to implement the PHP
    // %        note 1: behavior by default if IE ever does allow it; only gives shallow copy since
    // %        note 1: is by reference in PHP anyways
    // *     example 1: stuff = {d: '3', a: '1', b: '11', c: '4'};
    // *     example 1: stuff = usort(stuff, function (a, b) {return(a-b);});
    // *     results 1: stuff = {0: '1', 1: '3', 2: '4', 3: '11'};
    var valArr = [],
        k = '',
        i = 0,
        strictForIn = false,
        populateArr = {};

    if (typeof sorter === 'string') {
        sorter = this[sorter];
    } else if (Object.prototype.toString.call(sorter) === '[object Array]') {
        sorter = this[sorter[0]][sorter[1]];
    }

    // BEGIN REDUNDANT
    this.php_js = this.php_js || {};
    this.php_js.ini = this.php_js.ini || {};
    // END REDUNDANT
    strictForIn = this.php_js.ini['phpjs.strictForIn'] && this.php_js.ini['phpjs.strictForIn'].local_value && this.php_js.ini['phpjs.strictForIn'].local_value !== 'off';
    populateArr = strictForIn ? inputArr : populateArr;


    for (k in inputArr) { // Get key and value arrays
        if (inputArr.hasOwnProperty(k)) {
            valArr.push(inputArr[k]);
            if (strictForIn) {
                delete inputArr[k];
            }
        }
    }
    try {
        valArr.sort(sorter);
    } catch (e) {
        return false;
    }
    for (i = 0; i < valArr.length; i++) { // Repopulate the old array
        populateArr[i] = valArr[i];
    }

    return strictForIn || populateArr;
}
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