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udia assets node_modules mout src date weekOfTheYear.js
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assets/node_modules/mout/src/date/weekOfTheYear.js

define(['./dayOfTheYear'], function (dayOfTheYear) {
/**
* Return the week of the year based on given firstDayOfWeek
*/
function weekOfTheYear(date, firstDayOfWeek){
firstDayOfWeek = firstDayOfWeek == null? 0 : firstDayOfWeek;
var doy = dayOfTheYear(date);
var dow = (7 + date.getDay() - firstDayOfWeek) % 7;
var relativeWeekDay = 6 - firstDayOfWeek - dow;
return Math.floor((doy + relativeWeekDay) / 7);
}
return weekOfTheYear;
});