Use PHP functions in JavaScript

JavaScript usort

Sort an array by values using a user-defined comparison function

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function usort (inputArr, sorter) {
    // Sort an array by values using a user-defined comparison function  
    // 
    // version: 1008.1718
    // discuss at: http://phpjs.org/functions/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 (sorter instanceof 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;}
external links: original PHP docs | raw js source

Examples

Running

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stuff = {d: '3', a: '1', b: '11', c: '4'};
stuff = usort(stuff, function (a, b) {return(a-b);});

Should result in

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stuff = {0: '1', 1: '3', 2: '4', 3: '11'};

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.


Authors

Thanks to the following developers, you get to have usort goodness in JavaScript.

Comments

Add Comment
Use:
[CODE]
your_stuff('here');
[/CODE]
for proper code formatting
By submitting code here you are allowing us to use it in php.js hence dual licensing it under the MIT and GPL licenses

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