var addWeeks = require('../add_weeks/index.js')
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/**
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* @category Week Helpers
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* @summary Subtract the specified number of weeks from the given date.
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*
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* @description
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* Subtract the specified number of weeks from the given date.
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*
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* @param {Date|String|Number} date - the date to be changed
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* @param {Number} amount - the amount of weeks to be subtracted
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* @returns {Date} the new date with the weeks subtracted
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*
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* @example
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* // Subtract 4 weeks from 1 September 2014:
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* var result = subWeeks(new Date(2014, 8, 1), 4)
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* //=> Mon Aug 04 2014 00:00:00
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*/
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function subWeeks (dirtyDate, dirtyAmount) {
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var amount = Number(dirtyAmount)
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return addWeeks(dirtyDate, -amount)
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}
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module.exports = subWeeks
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