Hey, Diego —
Using conditions to:
- list / transclude
- Both of these are a bit difficult because formula results aren't
wikified right now.
- You could have a formula result in a filter or tiddler and list or
transclude that
- <$list filter=<<formula "if (insert condition here,
[tag[SomeTag]], [[mycondition is false]]">> > {{!!title}}... </$list>
- use a macro
- Zero-argument macros can be used directly in formulas
- It's tougher for macros with arguments, until I add support for
those
- show some text
- (= if (insert condition here, "text to show when condition is
true", "") =)
- set a variable
- Set a variable based on a condition
- <$formula-vars varToSet="if (insert condition here, "true-value",
"false-value")"> <<varToSet>>... </$formula-vars>
- set a field
- Changing fields will usually involve a $button widget and an
$action-setfield widget inside that whose arguments include formulas. I
use this myself for auto-calculation of tiddler fields and might make an
example of this later.
Here are a few examples doing some fancy calculations with the current
plugin:
- Math & Tabulation
- http://evanbalster.com/tiddlywiki/formulas.html#Demo%3A%20Tabulator
- Interactive SVG Visualizations
-
http://evanbalster.com/tiddlywiki/explorables.html#Demo%3A%20Real%20Projective%20Line
-
http://evanbalster.com/tiddlywiki/explorables.html#Demo%3A%20Harmonic%20Lattice
- http://evanbalster.com/tiddlywiki/formulas.html#Demo%3A%20Starburst
On Thursday, 21 December 2017 13:46:57 UTC-6, Diego Mesa wrote:
>
> Hey Evan,
>
> Im more and more impressed with this plugin, the more I use it. If anyone
> has some time and has already come up with cool examples, can you share?
> Also, Im interested in answering each of Tony's points from his earlier
> question:
>
> Evan,
>> Please forgive my Ignorance; What can a and b be equal to in Formulas'
>> logical functions, like IF and IFS?
>> I am thinking if something evaluates to true how do I use this to
>>
>> - list
>>
>>
>> - transclude
>>
>>
>> - Use macro
>>
>>
>> - Show some text etc...
>>
>>
>> - Set a variable/field
>>
>>
>> I imagine there is a way to write a list filter if a formula it true to
>> show when true (or False) etc...
>> I expect knowing this may help the less sophisticated users (still me at
>> this point) make use of formula.
>> Thanks in Advance
>> Tony
>
>
>
> with specific examples. If anyone has any that would be great!
>
> Best,
> Diego
>
>
>
> On Wednesday, December 20, 2017 at 9:40:21 PM UTC-6, Evan Balster wrote:
>>
>> Hey, Tony —
>>
>> I'm aware of the ordinary "de-duplication" behavior. In this case, it
>> was happening even with filter operators that would normally allow
>> duplication, like "get". This was because of a poorly-implemented
>> optimization I'd written to reduce compilation overhead during filter
>> processing. Behavior is now consistent with typical filter operations.
>>
>> The unusual behavior of TiddlyWiki's "get" operator is pretty important
>> if you're doing something like summing up a bunch of "quantity" fields
>> where many hold values like 1 or 2.
>>
>> On Wednesday, 20 December 2017 21:17:40 UTC-6, TonyM wrote:
>>>
>>> Evan,
>>>
>>> What you considered a Bug is a feature, because Titles are unique in
>>> TiddlyWiki so if you have two of the same name appear such as in when
>>> Tagged A, or B Or A and B we want the list of titles to be "de-duplicated",
>>> Of course when you use filters from non title sources we do not want this
>>> occurring. As you found.
>>>
>>> How did you address this? (details not necessary), I presume its only in
>>> formulae and not when you are filtering titles?
>>>
>>> Best wishes
>>> Tony
>>>
>>> On Thursday, 21 December 2017 14:05:37 UTC+11, Evan Balster wrote:
>>>>
>>>> *Formulas version 0.1.5*:
>>>> https://evanbalster.com/tiddlywiki/formulas.html
>>>> GitHub & issue tracking:
>>>> https://github.com/EvanBalster/TiddlyWikiFormula
>>>>
>>>> - Duplicate values in filters are now handled correctly.
>>>>
>>>>
>>>> On Wednesday, 20 December 2017 20:04:57 UTC-6, Evan Balster wrote:
>>>>>
>>>>> *General warning*: There is a bug in filter processing that prevents
>>>>> filters in formulas from returning duplicate values. This is likely to
>>>>> cause trouble with formulas like sum([tag[Expense]get[value]]) if two
>>>>> Expenses have the same value.
>>>>>
>>>>> This bug appears to have existed since the first release.
>>>>>
>>>>> I've got an incentive to fix this one quickly, so I might be patching
>>>>> this tonight.
>>>>>
>>>>> On Wednesday, 20 December 2017 19:53:59 UTC-6, Evan Balster wrote:
>>>>>>
>>>>>> Hey, TonyM —
>>>>>>
>>>>>> Are you formatting a lot of dates using the year/month/day
>>>>>> functions? If so, you'll probably have better luck with the text
>>>>>> conversion function T() and setting a dateFormat. See the documentation
>>>>>> for the FormulaWidget for more information on date format strings (which
>>>>>> use the same rules as in TiddlyWiki's settings).
>>>>>>
>>>>>> On Wednesday, 20 December 2017 19:31:53 UTC-6, TonyM wrote:
>>>>>>>
>>>>>>> Evan,
>>>>>>>
>>>>>>> Once again for you great work. I have started playing with the date
>>>>>>> related functions and finding it a little complex using Make a date
>>>>>>> from a TiddlyWiki timestamp and return.
>>>>>>>
>>>>>>> Is there any way to make this more direct or can you suggest a
>>>>>>> pattern to follow if all my dates are TiddlyWiki timestamps?
>>>>>>>
>>>>>>> PS I have many dates in one tiddler so it get unwieldy.
>>>>>>>
>>>>>>> Thanks in advance
>>>>>>> Tony
>>>>>>>
>>>>>>>
>>>>>>> On Thursday, 21 December 2017 11:31:49 UTC+11, Evan Balster wrote:
>>>>>>>>
>>>>>>>> *Formulas version 0.1.4*:
>>>>>>>> https://evanbalster.com/tiddlywiki/formulas.html
>>>>>>>> GitHub & issue tracking:
>>>>>>>> https://github.com/EvanBalster/TiddlyWikiFormula
>>>>>>>>
>>>>>>>> - Add text conversion functions:
>>>>>>>> - t, value, textjoin
>>>>>>>> - Add text utility functions:
>>>>>>>> - len, exact, mid, substitute, split, trim
>>>>>>>> - Add regular expression functions:
>>>>>>>> - regexreplace, regexmatch, regexextract, regexextract1.
>>>>>>>> - Add julian day / date conversion functions:
>>>>>>>> - julian, to_julian
>>>>>>>> - Fix off-by-one error in month function
>>>>>>>> - Fix error in if function, disable if function pending support
>>>>>>>> for more powerful function construction
>>>>>>>> - Fix errors in count and counta functions.
>>>>>>>> - Code cleanup
>>>>>>>>
>>>>>>>> New features are documented in the wiki.
>>>>>>>>
>>>>>>>> The strings and regex work were driven by my own needs with a data
>>>>>>>> archiving project.
>>>>>>>>
>>>>>>>>
>>>>>>>> On Wednesday, 20 December 2017 10:18:20 UTC-6, @TiddlyTweeter wrote:
>>>>>>>>>
>>>>>>>>> Dear Evan
>>>>>>>>>
>>>>>>>>> Thank you for adding that simple demo. It really helped me better
>>>>>>>>> understand how to use the plugin and make steps towards what I need!!
>>>>>>>>>
>>>>>>>>> Best wishes
>>>>>>>>> Josiah
>>>>>>>>>
>>>>>>>>> Evan Balster wrote:
>>>>>>>>>>
>>>>>>>>>> Released version 0.1.2:
>>>>>>>>>> http://evanbalster.com/tiddlywiki/formulas.html
>>>>>>>>>> ...
>>>>>>>>>> * Added badger inoculation simulator
>>>>>>>>>> <http://evanbalster.com/tiddlywiki/formulas.html#Demo%3A%20Tabulator>
>>>>>>>>>>
>>>>>>>>>> for @TiddlyTweeter (still lacks month automation, though)
>>>>>>>>>>
>>>>>>>>>
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