Eric,
You need to wikify the result of a complex macro before feeding it into the
next widget otherwise the macro code is included.
- One way to conceptualise this is;
- tiddlywiki always tries and passes the un-wikified result along so
it can be "evaluated" at the last moment
- Use the wikify at the last minute or in the wikitext that is using the
result. Unfortunately you can't move the wikify widget into a macro
- because it too will not be evaluated
- Remember - If you supply a complex macro rather than a simple
variable to a widget as a parameter it is like saying
Evaluate the widget, no wait first Evaluate the Parameter then evaluate
the widget. See second example below
- If First you wikify it it becomes a simple variable with the result as
already evaluated so looks more like a simple variable.
;Macro Result
<<intersect "[tag[Todo]] [all[]prefix[a]]" "[tag[Howto]] [all[]prefix[al]]"
>>
<hr>
;Macro used as input to the text widget
<$text text=<<intersect "[tag[Todo]] [all[]prefix[a]]" "[tag[Howto]]
[all[]prefix[al]]">>/>
<hr>
;Use as Variable after wikifying
<$wikify name=result text="""<<intersect "[tag[Todo]] [all[]prefix[a]]"
"[tag[Howto]] [all[]prefix[al]]">>""" >
<$text text=<<result>>/>
</$wikify>
Regards
Tony
On Thursday, 7 May 2020 15:32:10 UTC+10, Eric N. wrote:
>
> Thanks TonyM that's very handy !
>
> Would you know if there is a way to return the intersection set as a
> variable for later reuse ?
> Then I wouldn't have to decide upfront what to do with the intersection in
> the macro.
>
> I mean something like:
> f=intersect("[tag[Todo]] [all[]prefix[a]]", "[tag[Howto]]
> [all[]prefix[al]]")
>
> <<list-links "[enlist< $f$ >sort[]]">>
>
> <$list filter="[enlist<setAinterB>sort[]]">
> <$link/>
> </$list>
>
> ...
>
> But with the proper way to use variables, functions, macros, parameters,
> .... (what these elements are and how to use them in different contextes is
> still unclear to me)
>
> Cheers !
>
>
> On Thursday, May 7, 2020 at 8:38:23 AM UTC+4, TonyM wrote:
>>
>> Eric N
>>
>> Thanks for sharing, I thought I would turn it into a macro because it is
>> a general type of solution.
>>
>> \define intersect(filter1 filter2)
>> <$set name="filterA" filter="$filter1$">
>> <$set name="filterB" filter="$filter2$">
>> <$set name="setAunionB" filter="[enlist<filterA>] [enlist<filterB>]">
>> <$set name="setAnotB" filter="[enlist<filterA>] -[enlist<filterB>]">
>> <$set name="setBnotA" filter="[enlist<filterB>] -[enlist<filterA>]">
>> <$set name="setAinterB" filter="[enlist<setAunionB>] -[enlist<setAnotB>]
>> -[enlist<setBnotA>]">
>> <<list-links "[enlist<setAinterB>sort[]]">>
>> </$set></$set></$set></$set></$set>
>> \end
>>
>> <<intersect "[tag[Todo]] [all[]prefix[a]]" "[tag[Howto]]
>> [all[]prefix[al]]">>
>>
>> But I avoid the list-links macro because its a fixed format
>> The following lists only tiddler titles, using the default list widget
>> behaviour, but it easy to present things differentl
>> \define intersect(filter1 filter2)
>> <$set name="filterA" filter="$filter1$">
>> <$set name="filterB" filter="$filter2$">
>> <$set name="setAunionB" filter="[enlist<filterA>] [enlist<filterB>]">
>> <$set name="setAnotB" filter="[enlist<filterA>] -[enlist<filterB>]">
>> <$set name="setBnotA" filter="[enlist<filterB>] -[enlist<filterA>]">
>> <$set name="setAinterB" filter="[enlist<setAunionB>] -[enlist<setAnotB>]
>> -[enlist<setBnotA>]">
>> <$list filter="[enlist<setAinterB>sort[]]">
>>
>> </$list>
>> </$set></$set></$set></$set></$set>
>> \end
>>
>> For example place this in the blank line above
>> <$link/>,
>>
>> or you could add another parameter and use this template
>> \define intersect(filter1 filter2 template:"defaulttemplate")
>> <$set name="filterA" filter="$filter1$">
>> <$set name="filterB" filter="$filter2$">
>> <$set name="setAunionB" filter="[enlist<filterA>] [enlist<filterB>]">
>> <$set name="setAnotB" filter="[enlist<filterA>] -[enlist<filterB>]">
>> <$set name="setBnotA" filter="[enlist<filterB>] -[enlist<filterA>]">
>> <$set name="setAinterB" filter="[enlist<setAunionB>] -[enlist<setAnotB>]
>> -[enlist<setBnotA>]">
>> <$list filter="[enlist<setAinterB>sort[]]" template="$template$">
>>
>> </$list>
>> </$set></$set></$set></$set></$set>
>> \end
>>
>> Enjoy the possibilities
>>
>>
>> Regards
>> Tony
>>
>> On Wednesday, 6 May 2020 21:14:52 UTC+10, Eric N. wrote:
>>>
>>> I was stuck in my dev
>>> <https://groups.google.com/forum/#!topic/tiddlywiki/H90XO43PblE>
>>> because I couldn't output the intersection of two filters, each made of
>>> several runs. I didn't find a built-in function to do so, and I couldn't
>>> find a satisfying solution online. But I eventually found my own solution,
>>> shared here.
>>>
>>> Say I want to get all the tiddlers that satisfy the following conditions
>>> (toy example here, could also have a pair of very complex filters):
>>>
>>> (has tag Todo OR starts with "a") AND (has tag Howto OR starts with "al")
>>>
>>> This is computed by the following code, where the output list is enlist
>>> <setAinterB>, which is displayed by the list-links macro.
>>>
>>> <$set name="filterA" filter="[tag[Todo]] [all[]prefix[a]]">
>>> <$set name="filterB" filter="[tag[Howto]] [all[]prefix[al]]">
>>> <$set name="setAunionB" filter="[enlist<filterA>] [enlist<filterB>]">
>>> <$set name="setAnotB" filter="[enlist<filterA>] -[enlist<filterB>]">
>>> <$set name="setBnotA" filter="[enlist<filterB>] -[enlist<filterA>]">
>>> <$set name="setAinterB" filter="[enlist<setAunionB>] -[enlist<setAnotB>]
>>> -[enlist<setBnotA>]">
>>>
>>> <<list-links "[enlist<setAinterB>sort[]]">>
>>>
>>> </$set>
>>> </$set>
>>> </$set>
>>> </$set>
>>> </$set>
>>>
>>>
>>> *Caveat* : if a filter output contains double brackets (say a tiddler
>>> named "oh what a [[bad]] name") it breaks the enlist processing, and you
>>> won't have the correct output.
>>>
>>>
>>> Best,
>>> Eric
>>>
>>
--
You received this message because you are subscribed to the Google Groups
"TiddlyWiki" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/tiddlywiki/bc19aac5-03fa-414e-86f0-354dd0b9c23b%40googlegroups.com.
