[Remind-Fans] How to get reminders every 2 years?

[Claudio Pighin]

Thank very much Tim

for the good lesson!!!

Il Sab 22 Set 2018, 22:39 Tim Chase <remind at tim.thechases.com> ha scritto:

> On 2018-09-22 19:04, Claudio Pighin wrote:
> > Consider that I am not an expert and that I have difficulty on
> > understanding the computer language.
>
> Ah, sorry, I didn't want to talk down to you if you already knew the
> geekiness involved but should also have asked if you wanted
> additional details.  The "%" is the "modulo" operator, also known as
> the "remainder" when you do division.  So the expression
>
>   $Ty % 2
>
> means "take the trigger year ($Ty) and divide it by two and give me
> the remainder".  This remainder will either be 0 (it was an even year)
> or 1 (it was an odd year).  Then test for equality then expresses
> which you want:  did you want the even year ("== 0") or did you want
> the odd year ("== 1")
>
> Likewise for every 4th year, you divide by 4 and get the remainder
>
>   $Ty % 4
>
> and then specify which offset of those 4 years you want
>
>   $Ty % 4 == 0    # 2000, 2004, 2008, ...
>   $Ty % 4 == 1    # 2001, 2005, 2009, ...
>   $Ty % 4 == 2    # 2002, 2006, 2010, ...
>   $Ty % 4 == 3    # 2003, 2007, 2011, ...
>
> Hopefully that strikes the balance...helpful enough to empower you to
> tweak it as needed, but not so geeky as to give you traumatic
> flashbacks of middle-school math classes and doing long-division by
> hand. ;-)
>
> > verified that it works fine today 22 September 2018 and should
> > also be valid in 2020, 2022, etc.
>
> Indeed, for anything more complex than a fixed date or date-range
> (that I can usually copy/paste from elsewhere in my remind files), I
> always test a bunch of dates to make sure it's doing what I think it
> should.
>
> Best wishes,
>
> -tim
>
>
>
>
>
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