[pmwiki-users] Pagelist to list $:ptv>1993

[ABClf]

Hi Peter,

Thank you for your reply.
Until now, I can't make first (a) suggestion work (neither yyyy neither
yyyy-mm)
I have to say that what I called Date (maybe a bad idea ?) is the yyyy year
of the publication, not a yyyy-mm-dd formated date ; basically something
like :
Date : 2003
or, (when multiple editions*)
Date : 1996, 2003, 2009
As there is no Date in form of : Date : 2003-01 I'm not sure I will get
successfull using something like : if="date 1993-01..$:Date-01" (I deleted
the space after ..).

(c) works and is clearer than mine.

I'm also in trouble with (b) greateq and numcomp (parse error, unexpected
T_CASE ; for numcomp).

Of course, I may have done some errors while testing (a) and (c).

*Does anyone know how to extract the first 4 signs from a ptv, as in :
Date : 1896, 1932, 1966
{(substr "{=$:Date}" 0 4)} failed in following pagelist I test to select
pages where 4 first types from Date are > 1993 (for example, Date : 1995,
2005) :
(:pagelist trail=Argot.BibliographieDesDictionnaires fmt=#titredate {(substr
{=$:Date} 0 4)}=199[3-9],20[0-9][0-9] count=10:)

Thank you !

2009/10/29 Peter Bowers <pbowers at pobox.com>

> On Thu, Oct 29, 2009 at 6:49 PM, ABClf <languefrancaise at gmail.com> wrote:
> > Hello the list,
> > My question today is about using range, or > or < with pagelist.
> > My purpose is to list pages where $:Date is >=1993
>
> I don't think this capability is built into pmwiki.  Here are some
> possible alternatives...
>
> (a) Use the if="date 1993-01.. $:Date-01"
>
> I'm not sure if appending that -01is necessary or whether it will even
> work -- just an idea
>
> (b) Create your own conditional operator
>
> if="greateq $:Date 1993"
>
> See http://www.pmwiki.org/wiki/Cookbook/ConditionalMarkupSamples --
> I've taken a shot at modifying the "equal" condition below (no
> promises -- just a quick shot):
>
> $Conditions['greateq'] = 'GreaterEqualArgs($condparm) == 0';
> function GreaterEqualArgs($arg) {
> $arg = ParseArgs($arg); return (@$arg[''][0] >= @$arg[''][1]);
> }
>
> [1]
>
> (c) It's not ideal, but you can use character classes to make your
> wildcards a lot easier to maintain
>
> (:pagelist trail=Argot.BibliographieDesDictionnaires fmt=#title
> $:Date=199[3-9],20[0-9][0-9]:)
>
> Hope that helps!  (Note that these are just ideas to point you in
> possible directions - no testing whatsoever..)
>
> -Peter
>
>
> [1] This idea could be very easily generalized to allow for any binary
> numerical comparison...
>
> if="numcomp $:Date >= 1993"
>
> $Conditions['numcomp'] = 'NumericCompareArgs($condparm) == 0';
> function NumericCompareArgs($arg) {
>   $arg = ParseArgs($arg);
>   # Would be nice to check $arg[''][1] here using in_array() and give
> an error message
>   # Would be nice to check for existence and numericalness of [0] and
> [2] and error nicely
>   switch (@$arg[''][1]) {
>      case '>': return (@$arg[''][0] > @$arg[''][2])
>      case '>=': return (@$arg[''][0] >= @$arg[''][2])
>      case '<': return (@$arg[''][0] < @$arg[''][2])
>      case '<=': return (@$arg[''][0] <= @$arg[''][2])
>      case '!=': return (@$arg[''][0] != @$arg[''][2])
>      default: return (@$arg[''][0] == @$arg[''][2]);
>   }
> }
>
> Of course it could be done much more simply with eval() but then you
> have all kinds of security implications and you end up with even more
> code to deal with that...
>
> No testing whatsoever on any of this code.  You're on your own for that...
>



-- 
---------------------------------------
| A | de la langue française
| B | http://www.languefrancaise.net/
| C | languefrancaise at gmail.com
---------------------------------------
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.pmichaud.com/pipermail/pmwiki-users/attachments/20091030/d3aee6b2/attachment-0001.html