Use PHP functions in JavaScript

JavaScript next

Move array argument's internal pointer to the next element and return it

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function next (arr) {
    // Move array argument's internal pointer to the next element and return it  
    // 
    // version: 1109.2015
    // discuss at: http://phpjs.org/functions/next    // +   original by: Brett Zamir (http://brett-zamir.me)
    // %        note 1: Uses global: php_js to store the array pointer
    // *     example 1: transport = ['foot', 'bike', 'car', 'plane'];
    // *     example 1: next(transport);
    // *     example 1: next(transport);    // *     returns 1: 'car'
    // BEGIN REDUNDANT
    this.php_js = this.php_js || {};
    this.php_js.pointers = this.php_js.pointers || [];
    var indexOf = function (value) {        for (var i = 0, length = this.length; i < length; i++) {
            if (this[i] === value) {
                return i;
            }
        }        return -1;
    };
    // END REDUNDANT
    var pointers = this.php_js.pointers;
    if (!pointers.indexOf) {        pointers.indexOf = indexOf;
    }
    if (pointers.indexOf(arr) === -1) {
        pointers.push(arr, 0);
    }    var arrpos = pointers.indexOf(arr);
    var cursor = pointers[arrpos + 1];
    if (Object.prototype.toString.call(arr) !== '[object Array]') {
        var ct = 0;
        for (var k in arr) {            if (ct === cursor + 1) {
                pointers[arrpos + 1] += 1;
                return arr[k];
            }
            ct++;        }
        return false; // End
    }
    if (arr.length === 0 || cursor === (arr.length - 1)) {
        return false;    }
    pointers[arrpos + 1] += 1;
    return arr[pointers[arrpos + 1]];
}
external links: original PHP docs | raw js source

Examples

Running

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transport = ['foot', 'bike', 'car', 'plane'];
next(transport);
next(transport);

Should return

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'car'

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 next goodness in JavaScript.

Comments

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Use:
[CODE]
your_stuff('here');
[/CODE]
for proper code formatting
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