As a final word, here are united 4 macros doing exactly the same thing. The
interesting spot is the little differences in the way to use the syntax of
accessing a variable or a parameter. Notably, see the use of <__myVar__>
when the official doc just speaks of <<__myVar__>> (which is not helping).
Most of these macros were given by Atronoush and Eric. I thought it would
be nice to have them united for reference.
\define compter(tagg) <$count filter="[tag[critère $tagg$]]"/> tagged
\define compteux(rTag)
<$vars cTag={{{ [<__rTag__>addprefix[critère ]] }}}>
pour <<cTag>>, <$count filter="[tag<cTag>]"/> tagged
</$vars>
\end
\define comptard(rTag) <$count filter="[<__rTag__>addprefix[critère
]tagging[]]"/> tagged
\define comptine(rTag) <$count filter="[[critère $rTag$]tagging[]]"/> tagged
<<compteux 1.2>> :: <<compter 1.2>> %% <<comptard 1.2>> ~/~ <<comptine 1.2>>
Le vendredi 9 octobre 2020 à 11:55:10 UTC+2, Jean-Pierre Rivière a écrit :
> Yes, both of you helped me, in different ways. The use of __ was not very
> well explained. Here, I have a working example in full, coupled within a
> filter, and that's a real gem for me.
>
> And yes, the macro is not mean for black magic! Ony pouring text. That's
> simple but so easy to forget!!! Repeating again and again until it's an
> habit :-)
>
> But I have a problem with the macro text substitution and the wiki
> parsing. But this I will tell in an other subject, because this one has
> been fully answered!
>
> Mega thanks to our experts!
>
> Le mardi 6 octobre 2020 à 19:18:31 UTC+2, Eric Shulman a écrit :
>
>> On Tuesday, October 6, 2020 at 8:28:05 AM UTC-7, Jean-Pierre Rivière
>> wrote:
>>
>>> I have to filter tiddler with tags names of the form "criterion 2.4",
>>> "criterion 10.1", etc...
>>> I have devised a simple macro:
>>> \define countCrit(crit) <$count filter="[tag[$crit$]]"/>
>>> which is call like <<countCrit "criterion 4.2">>
>>>
>> But repeating "criterion" is tedious and could make error...
>>>
>>
>> Macros do ONLY two things:
>> 1) replace $param$ with values passed in as parameters
>> 2) replace $(variable)$ with values defined outside the macro as variables
>>
>> They do *NOT* actually parse or interpret the syntax inside the macro.
>> They simply treat the entire macro content as a text string, and then use a
>> "string replace" action to insert the values where they belong.
>>
>> Thus, if you have a macro like this:
>> \define countCrit(crit) <$count filter="[tag[critère $crit$]]" />
>>
>> and you invoke it using
>> <<countCrit 4.2>>
>> the resulting syntax that is produced by the macro,*before any parsing
>> occurs*, will be:
>> <$count filter="[tag[critère 4.2]]" />
>> which is just what you want.
>>
>> No fancy use of inline filters or other methods needed to assemble the
>> desired value.
>>
>> enjoy,
>> -e
>>
>
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