Validate number of days in a given month

Question

Performance is of the utmost importance on this one guys... This thing needs to be lightning fast!


How would you validate the number of days in a given mont

Answer 1

all this logic is already built in to the javascript engine... Why recode it ? Unless you are doing this just as an exercise, you can use the javascript Date object:

Like this:

function daysInMonth(aDate) {
      return new Date(aDate.getYear(), aDate.getMonth()+1, 0).getDate();      
   }