27 lines
814 B
JavaScript
27 lines
814 B
JavaScript
var differenceInDays = require('../difference_in_days/index.js')
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/**
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* @category Week Helpers
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* @summary Get the number of full weeks between the given dates.
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*
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* @description
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* Get the number of full weeks between the given dates.
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*
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* @param {Date|String|Number} dateLeft - the later date
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* @param {Date|String|Number} dateRight - the earlier date
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* @returns {Number} the number of full weeks
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*
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* @example
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* // How many full weeks are between 5 July 2014 and 20 July 2014?
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* var result = differenceInWeeks(
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* new Date(2014, 6, 20),
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* new Date(2014, 6, 5)
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* )
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* //=> 2
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*/
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function differenceInWeeks (dirtyDateLeft, dirtyDateRight) {
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var diff = differenceInDays(dirtyDateLeft, dirtyDateRight) / 7
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return diff > 0 ? Math.floor(diff) : Math.ceil(diff)
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}
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module.exports = differenceInWeeks
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