Edit array_rand version 30 | JsPHP: a JavaScript library providing the PHP API

Function: array_rand version 30

Function:	array_rand View array_rand Edit array_rand Edit code Edit tests Edit benchmark View latest code Edit latest code Benchmark array_rand Comment on array_rand Comment on the latest code View revisions View versions View contributors View dependencies View comments View links Download production code Download development code View the PHP docs View phpjs.org View phpjs.org raw code
Description:	Return key/keys for random entry/entries in the array.

Version:	30 View this version Edit this version Comment on this version Diff this version
Status:	latest
Date:	2011-12-20 04:35
Summary:	Import from phpjs.
Programmer:	jj5

Edit function

Code:

function array_rand (input, num_req) {
    // http://jsphp.co/jsphp/fn/view/array_rand
    // +   original by: Waldo Malqui Silva
    // *     example 1: array_rand( ['Kevin'], 1 );
    // *     returns 1: 0
    var indexes = [];
    var ticks = num_req || 1;
    var checkDuplicate = function (input, value) {
        var exist = false,
            index = 0,
            il = input.length;
        while (index < il) {
            if (input[index] === value) {
                exist = true;
                break;
            }
            index++;
        }
        return exist;
    };

    if (Object.prototype.toString.call(input) === '[object Array]' && ticks <= input.length) {
        while (true) {
            var rand = Math.floor((Math.random() * input.length));
            if (indexes.length === ticks) {
                break;
            }
            if (!checkDuplicate(indexes, rand)) {
                indexes.push(rand);
            }
        }
    } else {
        indexes = null;
    }

    return ((ticks == 1) ? indexes.join() : indexes);
}

JsPHP: a JavaScript library providing the PHP API

Function: array_rand version 30

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