Re: [Joda-interest] how to calculate weeks between 2 dates ?

[adwin g. <cal...@gm...>]

Thank you Stephen,

for Fortnightly calculations, should I add plusDays(1) to endDate ?
because If between 1/03/2009 - 21/03/2009 I got 2.5 fortnightly, while
it should be 2 (set scale to round_down ?)

regards
adwin


On Sat, Mar 7, 2009 at 10:48 PM, Stephen Colebourne
<sco...@jo...> wrote:
> adwin grails wrote:
>> at the moment i am using Weeks.weeksBetwee(start,end)  but it seems
>> produce result not same with what I need.
>>
>> for example :
>> import org.joda.time.DateTime;
>> import org.joda.time.* ;
>>
>> def x = new DateTime().withDate(2009,03,01);
>> def y = new DateTime().withDate(2009,03,21);
>>
>> def z = Days.daysBetween(x,y).getDays();  // produce 20 days
>> def w = Weeks.weeksBetween(x,y).getWeeks();  // produce 2 weeks -->
>> while it should be 3 weeks.
>
> The calculation is exclusive of the end date. Simply add one day to the
> end date to make it inclusive
>
> def w = Weeks.weeksBetween(x,y.plusDays(1)).getWeeks();
>
>> also how to calculate, for example the payment date is on every
>> tuesday fortnightly (2 weeks)
>> for example on 3/03/2009 and then 17/03/2009 and then 31/03/2009 ...
>> if I have date range between 01.march.2009 - 31.july.2009  ... how to
>> calculate how many fortnightly payments occurs during that period ?
>
> Calculate the number of weeks, divide by 2 and add one.
>
> Stephen
>
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