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- var startOfISOYear = require('../start_of_iso_year/index.js')
- /**
- * @category ISO Week-Numbering Year Helpers
- * @summary Are the given dates in the same ISO week-numbering year?
- *
- * @description
- * Are the given dates in the same ISO week-numbering year?
- *
- * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
- *
- * @param {Date|String|Number} dateLeft - the first date to check
- * @param {Date|String|Number} dateRight - the second date to check
- * @returns {Boolean} the dates are in the same ISO week-numbering year
- *
- * @example
- * // Are 29 December 2003 and 2 January 2005 in the same ISO week-numbering year?
- * var result = isSameISOYear(
- * new Date(2003, 11, 29),
- * new Date(2005, 0, 2)
- * )
- * //=> true
- */
- function isSameISOYear (dirtyDateLeft, dirtyDateRight) {
- var dateLeftStartOfYear = startOfISOYear(dirtyDateLeft)
- var dateRightStartOfYear = startOfISOYear(dirtyDateRight)
- return dateLeftStartOfYear.getTime() === dateRightStartOfYear.getTime()
- }
- module.exports = isSameISOYear
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