internal/baseEach.js

define(['./baseForOwn', './isLength', './toObject'], function(baseForOwn, isLength, toObject) {

  /**
   * The base implementation of `_.forEach` without support for callback
   * shorthands and `this` binding.
   *
   * @private
   * @param {Array|Object|string} collection The collection to iterate over.
   * @param {Function} iteratee The function invoked per iteration.
   * @returns {Array|Object|string} Returns `collection`.
   */
  function baseEach(collection, iteratee) {
    var length = collection ? collection.length : 0;
    if (!isLength(length)) {
      return baseForOwn(collection, iteratee);
    }
    var index = -1,
        iterable = toObject(collection);

    while (++index < length) {
      if (iteratee(iterable[index], index, iterable) === false) {
        break;
      }
    }
    return collection;
  }

  return baseEach;
});