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function array_reduce (a_input, callback) { // http://jsphp.co/jsphp/fn/view/array_reduce // + original by: Alfonso Jimenez (http://www.alfonsojimenez.com) // % note 1: Takes a function as an argument, not a function's name // * example 1: array_reduce([1, 2, 3, 4, 5], function (v, w){v += w;return v;}); // * returns 1: 15 var lon = a_input.length; var res = 0, i = 0; var tmp = []; for (i = 0; i < lon; i += 2) { tmp[0] = a_input[i]; if (a_input[(i + 1)]) { tmp[1] = a_input[(i + 1)]; } else { tmp[1] = 0; } res += callback.apply(null, tmp); tmp = []; } return res; }
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