code: function each(collection, iterator, context) {
    var i = 0;
  
    if ('array' === type(collection)) {
      for (; i < collection.length; i++) {
        if (false === iterator.call(context || iterator, collection[i], i, collection)) {
          return; // If false is returned by the callback we need to bail out.
        }
      }
    } else {
      for (i in collection) {
        if (hasOwn.call(collection, i)) {
          if (false === iterator.call(context || iterator, collection[i], i, collection)) {
            return; // If false is returned by the callback we need to bail out.
          }
        }
      }
    }
  }
docs: Iterate over a collection.
  
  @param {Mixed} collection The object we want to iterate over.
  @param {Function} iterator The function that's called for each iteration.
  @param {Mixed} context The context of the function.
  @api public