That is such wickedly awesome stuff, but I should know better than to try
to grasp all of this when I've already gone past my bedtime.
I'll be going to bed counting filters jumping over tiddlers. Hoping to get
a good sleep so I can look at this all over again bright-eyed and
bushy-tailed.
Still bright enough at the moment to belt out a happy "BRAVO!" and
"ENCORE!"
On Thursday, July 30, 2020 at 11:02:51 PM UTC-3 TW Tones wrote:
> Folks,
>
> For the intellectually or wiki text, curious, I stumbled upon the
> following as a result of someone else's code
>
> I have not yet published many wikis and plugins because I am still
> exploring all the fundamental methods without resorting to javascript. This
> is and example of how I overcame a serious limitation by discovering
> something which is perhaps an undocumented feature. If there is a gap, I am
> trying to fill it.
>
> However I give you notice I hope to publish a large number of macros,
> tools and plugins in the near future, especially to support designers and
> rapid development.
>
> Try this on tiddlywiki.com in a tiddler
> <$list filter="[range[10,100,10]]">
> {{!!title}}
> </$list>
> This seems intuitive correct but if you think about it the `{{!!title}}`
> field, does not exist for the virtual tiddlers that result from this range
> widget.
>
> *Why would I care?*
>
> - In tiddlywiki the only inbuilt way to translate a date serial number
> into a date is the view widget
> - eg `<$view tiddler="" $field="" format="date"
> template="YYYY-0MM-0DD"/>`
> - or `<$view tiddler="" $field="" format="relativedate"/>`
> - Created and modified dates as fields are an exception to this rule
> try {{!!created}} to see what I mean.
> - *The view widget does not permit variables as inpu*t, which has
> being a long time annoyance to me
> - *I now have an avenue to bypass this limitation*, also observed in
> use in some of JED's code
>
> For example provide a literal date as a variable via the list, but use the
> title as a field
> <$list filter="[[20210506]]">
> <$view field=title format="date" template="YYYY-0MM-0DD"/>
> </$list>
>
> - Not sure If I can get the relative date even with a full date serial
> (yet)
>
> Another exciting development, try this
> <$list filter="[range[20210215,20210315,1]]">
> <$view field=title format="date" template="YYYY-0MM-0DD"/><br>
> </$list>
> I am incrementing the date 2021/02/15 one day at a time until 2021/03/15
>
> - Notice the list* only returns valid dates*
> - Now you can get a list of *valid *dates
>
> Recognises year change
> <$list filter="[range[20201225,20210105,1]]">
> <$view field=title format="date" template="YYYY-0MM-0DD"/><br>
> </$list>
>
> Use to convert formats
> <$list filter="[[2020-12-25]split[-]join[]]"><!-- or variable,field etc
> -->
> <$view field=title format="date" template="0DD/0MM/YYYY"/><br>
> </$list>
> Whilst I could use join[/] I would not reorder the values, as in this case
>
> Other interesting and working examples
> <$list filter="[range[20201201,20211201,100]]">
> <$view field=title format="date" template="DDD YYYY-0MM-0DD"/><br>
> </$list>
> What is the day of week of the first of every month?
>
> Adding 7 days creeps forward? Not quite right?
> <$list filter="[range[20201225,20210105,7]]">
> <$view field=title format="date" template="0WW DDD YYYY-0MM-0DD"/><br>
> </$list>
> What is happening here, whats wrong with the order, is there a work around.
>
> *Conclusions*
>
> - Setting currentTiddler in a list via a filter allows you to use any
> filter to set a value, including a variable and *use title as the
> input to the ViewWidget*.
> - This opens the view widget up to any date even if it is a variable
> (or any other widget with this limitation?)
> - given it only returns valid dates, it is a source of a series of
> valid dates taking into account the changes inherit in calendars
> - It can be used to reformat any valid date even as a variable, or
> generated with increments.
> - A set of easy to use wikitext macros can be written to count,
> generate, manipulate dates, without any plugin or JavaScript code.
>
> *Optional challenge(s) *(for the reader)
>
> - It could be used to generate a method of counting days between two
> dates (left for the curious)
> - Tip count the output?
> - Used to generate date tiddlers of any format.
>
> Regards
> TW Tones
>
>
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