text: import toInteger from "../_lib/toInteger/index.js";
  import toDate from "../toDate/index.js";
  import addDays from "../addDays/index.js";
  import getISODay from "../getISODay/index.js";
  import requiredArgs from "../_lib/requiredArgs/index.js";
  /**
   * @name setISODay
   * @category Weekday Helpers
   * @summary Set the day of the ISO week to the given date.
   *
   * @description
   * Set the day of the ISO week to the given date.
   * ISO week starts with Monday.
   * 7 is the index of Sunday, 1 is the index of Monday etc.
   *
   * ### v2.0.0 breaking changes:
   *
   * - [Changes that are common for the whole library](https://github.com/date-fns/date-fns/blob/master/docs/upgradeGuide.md#Common-Changes).
   *
   * @param {Date|Number} date - the date to be changed
   * @param {Number} day - the day of the ISO week of the new date
   * @returns {Date} the new date with the day of the ISO week set
   * @throws {TypeError} 2 arguments required
   *
   * @example
   * // Set Sunday to 1 September 2014:
   * const result = setISODay(new Date(2014, 8, 1), 7)
   * //=> Sun Sep 07 2014 00:00:00
   */
  
  export default function setISODay(dirtyDate, dirtyDay) {
    requiredArgs(2, arguments);
    var date = toDate(dirtyDate);
    var day = toInteger(dirtyDay);
    var currentDay = getISODay(date);
    var diff = day - currentDay;
    return addDays(date, diff);
  }