lodash/_stackSet.js

define(['./_MapCache', './_assocSet'], function(MapCache, assocSet) {

  /** Used as the size to enable large array optimizations. */
  var LARGE_ARRAY_SIZE = 200;

  /**
   * Sets the stack `key` to `value`.
   *
   * @private
   * @name set
   * @memberOf Stack
   * @param {string} key The key of the value to set.
   * @param {*} value The value to set.
   * @returns {Object} Returns the stack cache instance.
   */
  function stackSet(key, value) {
    var data = this.__data__,
        array = data.array;

    if (array) {
      if (array.length < (LARGE_ARRAY_SIZE - 1)) {
        assocSet(array, key, value);
      } else {
        data.array = null;
        data.map = new MapCache(array);
      }
    }
    var map = data.map;
    if (map) {
      map.set(key, value);
    }
    return this;
  }

  return stackSet;
});