Use PHP functions in JavaScript

JavaScript array_map

Applies the callback to the elements in given arrays.

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function array_map (callback) {
    // Applies the callback to the elements in given arrays.  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/array_map    // +   original by: Andrea Giammarchi (http://webreflection.blogspot.com)
    // +   improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: Takes a function as an argument, not a function's name
    // %        note 2: If the callback is a string, it can only work if the function name is in the global context    // *     example 1: array_map( function (a){return (a * a * a)}, [1, 2, 3, 4, 5] );
    // *     returns 1: [ 1, 8, 27, 64, 125 ]
    var argc = arguments.length, argv = arguments;
    var j = argv[1].length, i = 0, k = 1, m = 0;
    var tmp = [], tmp_ar = []; 
    while (i < j) {
        while (k < argc){
            tmp[m++] = argv[k++][i];
        } 
        m = 0;
        k = 1;
 
        if (callback){            if (typeof callback === 'string') {
                callback = this.window[callback];
            }
            tmp_ar[i++] = callback.apply(null, tmp);
        } else {            tmp_ar[i++] = tmp;
        }
 
        tmp = [];
    } 
    return tmp_ar;
}
external links: original PHP docs | raw js source

Examples

Running

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array_map( function (a){return (a * a * a)}, [1, 2, 3, 4, 5] );

Should return

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[ 1, 8, 27, 64, 125 ]

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 array_map goodness in JavaScript.

Comments

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