Some experiments,
The Following gets the value from test, if empty test2 if empty test3
<$list filter="[all[current]get[test]] ~[all[current]get[test2]]
~[all[current]get[test3]]">
</$list>
In this case you will never get the emptyMessage only emptyval returned as
a title
<$list filter="[all[current]get[test]] ~[all[current]get[test2]]
~[all[current]get[test3]] ~[[emptyval]]" emptyMessage="Empty">
</$list>
The following gets the value of test if it has one, otherwise returns
testempty
<$list filter="[all[current]get[test]] ~[[testempty]]">
</$list>
Not really different to emptyMessage
I have not worked out how yet, but I am convinced we can do some very
complex conditionals using + - and ~
This will tell us a tiddler is "not active" if it has an item-completed or
item-cancelled field with contents
<$list filter="[all[current]has[item-cancelled]]
~[all[current]has[item-completed]]">
Not active
</$list>
Regards
Tony
On Thursday, November 22, 2018 at 5:47:48 PM UTC+11, TonyM wrote:
>
> Mohammad,
>
> I believe it just came out, so I doubt many have.
>
> On the git hub item I asked if multiple can be strung together, something
> I will test soon.
>
> I just tried this to display the caption and if none the tiddler name
> <<currentTiddler>>
> <$set name=display-title filter="[all[current]get[caption]] ~[{!!title}]">
> <<display-title>>
> <$link to=<<currentTiddler>> tooltip="Open tiddler"><<display-title>
> ></$link>
> </$set>
>
> However the link opens the non existent tiddler with the caption name
> rather than <<currentTiddler>>
>
> Not sure why that would be
>
> Regards
> Tony
>
> On Thursday, November 22, 2018 at 3:50:44 PM UTC+11, Mohammad wrote:
>>
>> The new prerelease 5.1.18 has introduced a *new filter prefix called
>> Else*
>>
>> See below:
>>
>> https://tiddlywiki.com/prerelease/#Filter%20Expression
>>
>>
>> - NEW IN: 5.1.18 the prefix ~, if the filter output so far is an
>> empty list then the output titles of the run are dominantly appended
>> <https://tiddlywiki.com/prerelease/#Dominant%20Append> to the
>> filter's output. If the filter output so far is not an empty list then
>> the
>> run is ignored
>>
>> In technical / logical terms:
>> RunInterpretationOutput
>> run union of sets ... OR run
>> +run intersection of sets ... AND run
>> -run difference of sets ... AND NOT run
>> ~run else ... ELSE run
>>
>>
>> Has anybody tried it? I appreciate to share some examples here
>>
>> Cheers
>> Mohammad
>>
>
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