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