lodash/internal/mapHas.js

import Map from './Map';
import assocHas from './assocHas';
import hashHas from './hashHas';
import isKeyable from './isKeyable';

/**
 * Checks if a map value for `key` exists.
 *
 * @private
 * @name has
 * @memberOf MapCache
 * @param {string} key The key of the entry to check.
 * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
 */
function mapHas(key) {
  var data = this.__data__;
  if (isKeyable(key)) {
    return hashHas(typeof key == 'string' ? data.string : data.hash, key);
  }
  return Map ? data.map.has(key) : assocHas(data.map, key);
}

export default mapHas;