Hi S.S, This is great! You can visually and interactively play with $set and see the result!
Thank you On Friday, April 5, 2019 at 4:50:39 AM UTC+4:30, S. S. wrote: > > > The set widget is very useful for choosing between multiple options. > Understanding the logic of what combinations of the $set widget's > attributes produce the desired outcome is essential to using it for such a > requirement. > The discussion above was quite a revelation. > > Here's a possible use. > > If A is not empty, chose A > If A is empty, chose B > If B is empty, chose C > If C is empty, chose D > > A real case secenario occurred within the date() macro > <https://groups.google.com/forum/?hl=en#!topic/tiddlywiki/_bbDpiiReic>: > > In the macro, I wanted to choose a template based on: > If there is a *template-day* parameter ( *$template-day$* ) > Use that > If NO *template-day* parameter > Use the *template* parameter ( *$template$* ) > If NO *template* parameter > Use the *Custom Settings* field value (stored in tiddler: > *date-settings-tiddler* field: *template-day* ) > If NO *Custom Settings* > Use the template *default variable* ( > *<<template-day-default>>* ) > > <$set name="temp" tiddler="date-settings-tiddler" field="template-day" > emptyValue=<<template-day-default>>> > <$set name="temp-template" filter="[enlist[$template$]]" > value="$template$" emptyValue=<<temp>>> > <$set name="template" filter="[enlist[$template-day$]]" > value="$template-day$" emptyValue=<<temp-template>>> > > Code using <<template>> > > </$set> > </$set> > </$set> > > Note how the $set flow is an exact reverse of the logical requirement, > where the most important variable ( *template-day* ) is tested last. > > So, for those interested, attached is a: Set Widget Tester for attribute > precedence tiddler. > Drag & drop it into your TiddlyWiki or tiddlywiki.com & hopefully quickly > check the result of any combination of the set widget's parameters. > > Regards. > > > On Monday, April 1, 2019 at 10:26:24 PM UTC+7, Jeremy Ruston wrote: >> >> Hi SS >> >> That’s great, thank you. >> >> > Testting shows: If there is a value attribute & no emptyValue >> attribute, the value is returned irrespective of the filter's result. >> >> I can confirm that behaviour, and I think it’s a bug. But… I’m not 100% >> sure that we should fix it; it might be better just to revise the docs at >> this point (the observed behaviour is simpler to describe in the docs). >> >> Best wishes >> >> Jeremy >> >> -- 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 post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/b7ce7fa0-be71-4adf-80ec-5195c13341c9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
