1 | ;
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = lastDayOfISOWeekYear;
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7 |
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8 | var _index = _interopRequireDefault(require("../getISOWeekYear/index.js"));
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9 |
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10 | var _index2 = _interopRequireDefault(require("../startOfISOWeek/index.js"));
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11 |
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12 | var _index3 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
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13 |
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14 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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15 |
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16 | /**
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17 | * @name lastDayOfISOWeekYear
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18 | * @category ISO Week-Numbering Year Helpers
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19 | * @summary Return the last day of an ISO week-numbering year for the given date.
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20 | *
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21 | * @description
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22 | * Return the last day of an ISO week-numbering year,
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23 | * which always starts 3 days before the year's first Thursday.
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24 | * The result will be in the local timezone.
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25 | *
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26 | * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
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27 | *
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28 | * ### v2.0.0 breaking changes:
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29 | *
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30 | * - [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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31 | *
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32 | * - The function was renamed from `lastDayOfISOYear` to `lastDayOfISOWeekYear`.
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33 | * "ISO week year" is short for [ISO week-numbering year](https://en.wikipedia.org/wiki/ISO_week_date).
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34 | * This change makes the name consistent with
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35 | * locale-dependent week-numbering year helpers, e.g., `getWeekYear`.
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36 | *
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37 | * @param {Date|Number} date - the original date
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38 | * @returns {Date} the end of an ISO week-numbering year
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39 | * @throws {TypeError} 1 argument required
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40 | *
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41 | * @example
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42 | * // The last day of an ISO week-numbering year for 2 July 2005:
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43 | * var result = lastDayOfISOWeekYear(new Date(2005, 6, 2))
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44 | * //=> Sun Jan 01 2006 00:00:00
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45 | */
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46 | function lastDayOfISOWeekYear(dirtyDate) {
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47 | (0, _index3.default)(1, arguments);
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48 | var year = (0, _index.default)(dirtyDate);
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49 | var fourthOfJanuary = new Date(0);
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50 | fourthOfJanuary.setFullYear(year + 1, 0, 4);
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51 | fourthOfJanuary.setHours(0, 0, 0, 0);
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52 | var date = (0, _index2.default)(fourthOfJanuary);
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53 | date.setDate(date.getDate() - 1);
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54 | return date;
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55 | }
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56 |
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57 | module.exports = exports.default; |
\ | No newline at end of file |