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: / var / canvas / node_modules / date-fns / difference_in_weeks /

Filename : index.js

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var differenceInDays = require('../difference_in_days/index.js')

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

module.exports = differenceInWeeks