Hi FrD,
Thank you for your solution, it's clever!
However I would prefer a simpler way if possible: if I use this, I'm
sure that I won't remember what it means when I read it again later...
Erwan
On 25/10/15 21:18, FrD wrote:
Hi Erwan,
I have a solution, but not a very elegant one :
\define myFilter()
a$(param)$ +[removesuffix[a]]
\end
<$set name="v" filter=<<myFilter>> value="default" emptyValue=<<param>>>
<$text text=<<v>>/>
</$set>
<$set name="param" value="myValue">
<$set name="v" filter=<<myFilter>> value="default" emptyValue=<<param>>>
<$text text=<<v>>/>
</$set></$set>
FrD
Le dimanche 25 octobre 2015 15:46:49 UTC+1, Erwan a écrit :
Hi again everyone,
use case: I want to build MyTemplate which shows a link to the
current
tiddler, with the text of the link being either a specific value
given
as parameter, or "title" by default.
So I'm trying to assign a variable "v" with the value of variable
"param" if "param" is defined, or some default value otherwise. I
tried
this:
<$set name="param" value="myvalue">
<$set name="v" filter="[<param>]" emptyValue="default">
<$text text=<<v>>>
</$set>
</$set>
but it doesn't work. I also tried various combinations like:
<$set name="v" filter="[<param>]" value=<<param>>
emptyValue="default">
but that would assign either "myvalue" or nothing instead of
"default"... I'm confused.
I guess another way to phrase the question is: how can I check
whether a
variable has a value or not?
Regards
Erwan
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