How to install murrine engine?

Question

I need to get the first day of the week by using the week number (weeks starting on Monday). I found this piece of code here: https://stackoverflow.com/a/46343917/13498210. However, the code doesn't seem to work. For example, inputing week 34 returns the date 08-22 (the sunday of the previous week) instead of the correct 08-23.

My question is, is it safe to just "add" one day to the result? Or will that create bugs?

function getFirstMondayOfWeek(weekNo) {
    var firstMonday = new Date(new Date().getFullYear(), 0, 4, 0, 0, 0, 0);

    while (firstMonday.getDay() != 1) {
        firstMonday.setDate(firstMonday.getDate() - 1);
    }
    if (1 <= weekNo && weekNo <= 52)
        return firstMonday.setDate(firstMonday.getDate() + 7 * (weekNo - 1));

    firstMonday.setDate(firstMonday.getDate() + 7 * (weekNo - 1));
    if (weekNo = 53 && firstMonday.getDate() >= 22 && firstMonday.getDate() <= 28)
        return firstMonday; //JUST ADD A DAY HERE
    return null;
}

Solution

The package for the murrine engine, the cairo-based gtk+-2.0 theme engine is gtk2-engines-murrine. cairo is a 2D vector graphics library.

sudo apt-get install gtk2-engines-murrine

The murrine engine is based on clearlooks and approximately 30% faster.

Comments

[fuzzybear]

what do you mean first Monday of the week ? do you mean Month?

[hampani]

I want to get the first day of the week, with weeks starting on Mondays.

[Mihai T]

so basically you want to change the default ' first-day ' ( 0 ) to be Monday instead of Sunday ?

[RobG]

Please post working code here. A good answer should explain why the OP has their issue and how your code fixes it.

[RobG]

Adding and removing days as milliseconds is not reliable as not all days are 24 hours long were daylight saving is observed.

[lejlun]

@RobG I'm not sure I get what you mean. Could you give an example where this function would fail?

[RobG]

Over a daylight saving boundary where a day may be 23 or 25 hours long (or 23.5 or 24.5 if the DST offset is 30 minutes).

[RobG]

People shouldn't have to go to another site to see the code. It also makes commenting on the code more difficult, and links rot.

[fuzzybear]

I get your view RobG but I don't mind clicking a link it helps to proliferate code out there IMHO, what if SO shutdown, etc, there are swings and roundabouts to both I guess?

[RobG]

Like Gary, SO will never die…