labs.arrayWhere.faster.js

Array.prototype.where = Array.prototype.where || function(predicate) {
  var results = [],
      len = this.length,
      i = 0;

  for(; i < len; i++) {
    var item = this[i];
    if (predicate(item)) {
      results.push(item);
    }
  }

  return results;
};