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 = subISOWeekYears;
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7 |
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8 | var _index = _interopRequireDefault(require("../_lib/toInteger/index.js"));
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9 |
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10 | var _index2 = _interopRequireDefault(require("../addISOWeekYears/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 subISOWeekYears
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18 | * @category ISO Week-Numbering Year Helpers
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19 | * @summary Subtract the specified number of ISO week-numbering years from the given date.
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20 | *
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21 | * @description
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22 | * Subtract the specified number of ISO week-numbering years from the given date.
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23 | *
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24 | * ISO week-numbering year: http://en.wikipedia.org/wiki/ISO_week_date
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25 | *
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26 | * ### v2.0.0 breaking changes:
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27 | *
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28 | * - [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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29 | *
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30 | * - The function was renamed from `subISOYears` to `subISOWeekYears`.
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31 | * "ISO week year" is short for [ISO week-numbering year](https://en.wikipedia.org/wiki/ISO_week_date).
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32 | * This change makes the name consistent with
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33 | * locale-dependent week-numbering year helpers, e.g., `setWeekYear`.
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34 | *
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35 | * @param {Date|Number} date - the date to be changed
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36 | * @param {Number} amount - the amount of ISO week-numbering years to be subtracted. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
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37 | * @returns {Date} the new date with the ISO week-numbering years subtracted
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38 | * @throws {TypeError} 2 arguments required
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39 | *
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40 | * @example
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41 | * // Subtract 5 ISO week-numbering years from 1 September 2014:
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42 | * var result = subISOWeekYears(new Date(2014, 8, 1), 5)
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43 | * //=> Mon Aug 31 2009 00:00:00
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44 | */
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45 | function subISOWeekYears(dirtyDate, dirtyAmount) {
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46 | (0, _index3.default)(2, arguments);
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47 | var amount = (0, _index.default)(dirtyAmount);
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48 | return (0, _index2.default)(dirtyDate, -amount);
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49 | }
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50 |
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51 | module.exports = exports.default; |
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