code: function forEach(collection, iteratee) {
          var func = isArray(collection) ? arrayEach : baseEach;
          return func(collection, getIteratee(iteratee, 3));
      }
docs: /*------------------------------------------------------------------------ 
  Iterates over elements of `collection` and invokes `iteratee` for each element.
  The iteratee is invoked with three arguments: (value, index|key, collection).
  Iteratee functions may exit iteration early by explicitly returning `false`.
  
  **Note:** As with other "Collections" methods, objects with a "length"
  property are iterated like arrays. To avoid this behavior use `_.forIn`
  or `_.forOwn` for object iteration.
  
  @static
  @memberOf _
  @since 0.1.0
  @alias each
  @category Collection
  @param {Array|Object} collection The collection to iterate over.
  @param {Function} [iteratee=_.identity] The function invoked per iteration.
  @returns {Array|Object} Returns `collection`.
  @see _.forEachRight
  @example
  
  _.forEach([1, 2], function(value) {
  console.log(value);
  });
  // => Logs `1` then `2`.
  
  _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
  console.log(key);
  });
  // => Logs 'a' then 'b' (iteration order is not guaranteed).