Re: [Orgmode] Last workday of the month

[Chris Maier]

Where do the functions 'calendar-extract-day',
'calendar-extract-month', 'calendar-extract-year', and
'calendar-last-day-of-the-month' come from?  I was looking for
something like those when I wrote my initial implementation, but I
don't seem to have them (hence the ugliness of the code!)  I'm running
GNU Emacs 23.2 for Mac OS X.  Searching for these functions using `C-h
f` turns up nothing for me.

Thanks for the help,
Chris

On Sat, Oct 30, 2010 at 4:19 PM, Nick Dokos <address@hidden> wrote:
> Chris Maier <address@hidden> wrote:
>
>> I'm trying to come up with a sexp diary entry that shows my payday,
>> which is the last weekday of the month, in my Org agenda.  I've tried
>> to adapt the example given in the Emacs manual and this is what I came
>> up with:
>>
>> %%(let ((month (car date))
>>         (day (cadr date))
>>         (dayname (calendar-day-of-week date)))
>>     (or
>>      ;; months with 31 days
>>      (and (memq month '(1 3 5 7 8 10 12))
>>              (or (and (= day 31)
>>                       (memq dayname '(1 2 3 4 5)))
>>                  (and (memq day '(29 30))
>>                       (= dayname 5))))
>>      ;; months with 30 days
>>      (and (memq month '(4 6 9 11))
>>           (or (and (= day 30)
>>                    (memq dayname '(1 2 3 4 5)))
>>               (and (memq day '(28 29))
>>                    (= dayname 5))))
>>      ;; February (the weird one)
>>      (and (= month 2)
>>           (or (and (memq day '(28 29))
>>                    (memq dayname '(1 2 3 4 5)))
>>               (and (memq day '(26 27 28))
>>                    (= dayname 5)))))) Chris' Paycheck Deposited
>>
>> It appears to work so far.  However, I'm certain there's got to be a
>> more concise way of coding this, but I can't seem to find any
>> pre-existing calendar functions that might help.  Am I missing
>> something?
>>
>
> This is based on the same idea and example from the manual, but it
> precalculates what it needs in order to simplify the decision at
> the end:
>
> (let* ((dayname (calendar-day-of-week date))
>              (day (calendar-extract-day date))
>              (month (calendar-extract-month date))
>              (year (calendar-extract-year date))
>              (lastday (calendar-last-day-of-month month year))
>              (last-two-days-before-last-day (list (- lastday 2) (- lastday 
> 1))))
>           (or (and (= day lastday) (memq dayname '(1 2 3 4 5)))
>               (and (memq day last-two-days-before-last-day) (= dayname 5)))
>              )
>
> Very lightly tested, so use with caution.
>
>> To make this even better, is there some way to consult another file of
>> diary entries containing all the holidays at my workplace, so the
>> diary entry would show up on the last weekday of the month that is not
>> a company holiday?
>>
>
> I'm sure there is - simplest is probably to set a variable in your
> .emacs with all the holidays - schedule that with org for Dec. 31 :-) -
> but you are on your own for that. I just don't think it's worth it: at
> least for me, there are only three holidays during a year that might
> interfere with that pay schedule.
>
> HTH,
> Nick
>