Tony, I think you should change var1 and var2 in your set widget based on
talha question
\define mymacro(var1 var2:"")
<$set name=result value="$var2$" emptyValue="$var1$">
<li>v1: $var1$</li>
<li>v2: $var2$</li>
<li>v2(result): <<result>></li>
</$set>
\end
<<mymacro test next>>
<<mymacro test>>
On Wednesday, July 18, 2018 at 5:12:46 AM UTC+4:30, TonyM wrote:
>
> An answer more specific to you case
>
> \define mymacro(var1 var2)
> <$set name=result value="$var1$" emptyValue="$var2$">
> <<result>>
> </$set>
> \end
>
> But the above does not address if var2 is empty
>
> Regards
> Tony
>
> On Wednesday, July 18, 2018 at 10:36:52 AM UTC+10, TonyM wrote:
>>
>> Talha,
>>
>> The default value set in the define macro can distract you from another
>> way of setting a default value, using the setWidgets emptyValue or
>> listwidgets emptyMessage
>>
>> In the below example should be sufficient to explain what I mean. Note
>> the convenience of having an input fieldname value $fieldname$ and variable
>> <<fieldname>>
>>
>> \define mymacro(fieldname)
>> <$set name=fieldname value="$fieldname$" emptyValue="default value">
>> <<fieldname>>
>> </$set>
>> \end
>>
>>
>> <<mymacro>>
>> <<mymacro description>>
>>
>> Then if the macro is calling other macros or widgets use the $macrocall
>> widget then you can pass <<fieldname>> into those macros
>>
>> Eg; In the above macro
>>
>> <$macrocall $name="othermacroorwidget" inputvalue=<<fieldname>>/>
>>
>>
>> or outside the macro in wikitext
>>
>>
>> <$macrocall $name="mymacro" fieldname="description"/>
>> <$macrocall $name="mymacro" fieldname=<<othermacro>>/>
>>
>>
>> <$macrocall $name="mymacro" fieldname={{!!description}}/>
>>
>>
>> Note: field transclusion example Not tested today
>>
>>
>> The above is not using the <<__fieldname__>> method I am yet to digest. It
>> may reduce the need for $macrocall however this is a nice method to use
>> especially in macros
>>
>> Macros that you design for re-use, they spell it out and don't rely on the
>> position of values you pass to the macro you are calling.
>>
>>
>> Additional advanced note:
>>
>> If you use recursion where mymacro calls itself mymacro such as in toc
>> macros, it is a fact that the fieldname $fieldname$ and variable
>> <<fieldname>> will be reused for each invocation thus they have the same
>> name but will not have the same value.
>>
>> So if the recursion went 5 levels deep each invocation will use an
>> independent set of variables called fieldname for each level
>>
>>
>> Regards
>>
>> Tony
>>
>>
>> On Wednesday, July 18, 2018 at 3:05:46 AM UTC+10, talha131 wrote:
>>>
>>> Say I have a macro
>>>
>>> \define example(v1, v2:"")
>>> \end
>>>
>>> If v2 is empty than I want to assign value of v1 to v2. What’s the TW
>>> syntax for this?
>>>
>>>
>>
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