lodash/wrapperFlatMap.js

define([], function() {

  /**
   * This method is the wrapper version of `_.flatMap`.
   *
   * @name flatMap
   * @memberOf _
   * @category Seq
   * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
   * @returns {Object} Returns the new `lodash` wrapper instance.
   * @example
   *
   * function duplicate(n) {
   *   return [n, n];
   * }
   *
   * _([1, 2]).flatMap(duplicate).value();
   * // => [1, 1, 2, 2]
   */
  function wrapperFlatMap(iteratee) {
    return this.map(iteratee).flatten();
  }

  return wrapperFlatMap;
});