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define([], function() {
  /** Used as a safe reference for `undefined` in pre-ES5 environments. */  var undefined;
  /**   * Gets the first element of `array`.   *   * @static   * @memberOf _   * @since 0.1.0   * @alias first   * @category Array   * @param {Array} array The array to query.   * @returns {*} Returns the first element of `array`.   * @example   *   * _.head([1, 2, 3]);   * // => 1   *   * _.head([]);   * // => undefined   */  function head(array) {    return (array && array.length) ? array[0] : undefined;  }
  return head;});