php.js/array_product.js

Use phpjs functions as required.

module.exports=function(){ return array_product.apply(exports,arguments) };

function array_product(input) {
  //  discuss at: http://phpjs.org/functions/array_product/
  // original by: Waldo Malqui Silva
  //   example 1: array_product([ 2, 4, 6, 8 ]);
  //   returns 1: 384

  var idx = 0,
    product = 1,
    il = 0;

  if (Object.prototype.toString.call(input) !== '[object Array]') {
    return null;
  }

  il = input.length;
  while (idx < il) {
    product *= (!isNaN(input[idx]) ? input[idx] : 0);
    idx++;
  }
  return product;
}