Ok, I'll explain:
The macro *doesn't *get called first.
first the currentMonth and currentYear variables are defined.
Then the filter
[all[tiddlers]!has[draft.of]!sort[created]get[created]removeprefix<currentYear>removeprefix<currentMonth>limit[3]
does:
1: all tiddlers not currently open
2: !sort[created] ... sort by creation date but in reverse order - so the
last created are on top of the list. Now the filter shows the creation
dates of the tiddlers, not the names. The creation dates have the form:
20171205<hour><minute><seconds><nanoseconds?>
3: removeprefix<currentYear> ... removes the prefix "2017" from the
creation dates. if the prefix is not 2017 the tiddler doesn't pass the
filter. removeprefix<currentMonth> then removes the prefix "12" . Every
tiddler that doesn't have "12" as prefix at that point doesn't pass. then
limi[3] chooses the last three.
4. now you have the last three creation dates but without 201712 at the
beginning. Just <hour><minute><seconds><nanoseconds>
5. <<getTiddlerTitle>> now calls the macro that is defined on top (macros
have to be defined on top of the tiddler).
6. the filter
[all[tiddlers]field:created[$(currentYear)$$(currentMonth)$$(currentTiddler)$]]
now filters all tiddlers with creation date
$(currentYear)$$(currentMonth)$$(currentTiddler)$ ... currentYear=2017
currentMonth=12 currentTiddler=the filter result from the
removeprefix-filter. that is just the creation date without year and month.
This filter makes a puzzle.
Am Dienstag, 5. Dezember 2017 20:36:15 UTC+1 schrieb Lost Admin:
>
> I understand some of what is going on there. You define a macro that
> prints the titles of all tiddlers with a creation date that matches 3
> variables (currentYear, currentMonths, and currentTiddler).
>
> Then you define currentYear and currentMonth to be (as the name suggests)
> the current year and current month.
>
> The last filter loses me bit. It starts out building a list of all non
> draft (not being edited) tiddlers, all[tiddlers]!has[
> draft.of]
>
> Then, I think it sorts by the created field (so I get most recent at the
> top of the list). The removeprefix loses me.
> The limit[3], I understand. That says only give the first three results.
>
> I'm not sure how this works for notices that went up on say the 30th of
> the previous month when it is the 1st. Those would be less than a month old
> but aren't in the current month.
>
>
>
>
> On Tuesday, December 5, 2017 at 12:17:02 PM UTC-5, BurningTreeC wrote:
>>
>> \define getTiddlerTitle()
>> <$list
>> filter="[all[tiddlers]field:created[$(currentYear)$$(currentMonth)$$(currentTiddler)$]]">
>>
>> {{!!title}}
>>
>> </$list>
>> \end
>>
>> <$vars currentMonth=<<now MM>> currentYear=<<now YYYY>>>
>>
>> <$list
>> filter="[all[tiddlers]!has[draft.of]!sort[created]get[created]removeprefix<currentYear>removeprefix<currentMonth>limit[3]]">
>> <<getTiddlerTitle>>
>> </$list>
>>
>> </$vars>
>>
>> Am Montag, 4. Dezember 2017 18:00:28 UTC+1 schrieb Lost Admin:
>>>
>>> Hi all,
>>>
>>> I started using TiddlyWiki as a tool to quickly make a small website. I
>>> would like to make an announcements/news section. I figured using the
>>> Journal tiddler technique would make a good way to generate a news list. It
>>> sorts by date and I can easily use the table-of-contents macro to generate
>>> a page listing all the news tiddlers.
>>>
>>> I would also like to have a subset of the most recent news show up on
>>> the default tiddler (transcluding them). I can't figure out how to make a
>>> filter to generate the list of tiddlers to transclude. Is there an easy way
>>> to do this? I'm thinking something like:
>>>
>>> All journal tiddlers that were created in the last month. Possibly
>>> further filtered by only displaying the most recent 3 in that list if there
>>> are more than 3 entries in that list.
>>>
>>
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