On Wednesday, October 14, 2020 at 2:09:57 AM UTC-7, Jean-Pierre Rivière
wrote:
>
> \define countTaggedBySelf() <$count
> filter="[all[current]tagging[]butfirst[]]"/>
> <$set name="qty" value=<<countTaggedBySelf>> >
> <$set name="loc"
> filter="[<qty>compare:number:gt[1]then[several]else[single]]">
> got <<qty>>: <<loc>><br/>
> </$set></$set>
>
> Then I get "got 2: single" ??? (in a tiddler where the countTaggedBySelf
> has sense and returns 2.)
> But if I write instead
> <$set name="qty" value=2 >
>
Macros do *not* "evaluate the syntax and return the output"... they just do
substitutions for $param$ and $(variable)$
Thus, countTaggedBySelf() does not return a number, it returns: <$count
filter="[all[current]tagging[]butfirst[]]"/>
and the subsequent <$set name="qty" ...> also just sets the qty variable
to: <$count filter="[all[current]tagging[]butfirst[]]"/>
There are several ways to fix this:
Method #1: use <$wikify> to convert the <$count> into it's actual number:
\define countTaggedBySelf() <$count filter=
"[all[current]tagging[]butfirst[]]"/>
<$wikify name="qty" text=<<countTaggedBySelf>> >
<$set name="loc" filter=
"[<qty>compare:number:gt[1]then[several]else[single]]">
got <<qty>>: <<loc>><br/>
</$set></$wikify>
Method #2: use the [count[]] filter instead of the $count widget:
<$set name="qty" filter="[all[current]tagging[]butfirst[]count[]]" >
<$set name="loc" filter="[<qty>
compare:number:gt[1]then[several]else[single]]">
got <<qty>>: <<loc>><br/>
</$set></$set>
Simplification #1: if you don't need the "qty" value, combine all the
filter syntax
<$set name="loc"
filter="[all[current]tagging[]butfirst[]count[]compare:number:gt[1]then[several]else[single]]">
got <<loc>><br/>
</$set>
Simplification #2: use $vars with a "filtered transclusion" instead of $set
<$vars loc={{{
[all[current]tagging[]butfirst[]count[]compare:number:gt[1]then[several]else[single]]
}}}>
got <<loc>><br/>
</$vars>
Simplification #3: if you just want to display the result, skip the $vars
(or $set) entirely:
{{{ [all[current]tagging[]butfirst[]count[]compare:number:gt[1]then[several]
else[single]] }}}
enjoy,
-e
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