Huh, maybe localhost is down. :) https://evanbalster.com/tiddlywiki/formulas.html#Demo%3A%20Line%20Graph
Generating SVG paths in TiddlyWiki is something I've been wanting for ages... It was possible in a limited capacity with wikify before, but this makes it a lot more practical. On Sunday, 14 January 2018 23:20:53 UTC-6, TonyM wrote: > > Evan > > Thanks once again. I will start using ASAP. > > FYI Link dead (ie no tiddler) > http://localhost:8080/#Demo%3A%20Line%20Graph > <http://www.google.com/url?q=http%3A%2F%2Flocalhost%3A8080%2F%23Demo%253A%2520Line%2520Graph&sa=D&sntz=1&usg=AFQjCNFVSpeFn8xtN3K92Vtj1tjZ5XXD7Q> > > Regards > Tony > > > On Monday, 15 January 2018 16:05:05 UTC+11, Evan Balster wrote: >> >> *Formula 0.2.0 released*: >> https://evanbalster.com/tiddlywiki/formulas.html >> GitHub and issue tracking: >> https://github.com/EvanBalster/TiddlyWikiFormula >> >> This one's a doozie... Changelog: >> >> A substantial re-write of the formulas plugin that introduces various >> improvements and improves support for functional programming. Various minor >> compatibility-breaking changes were made. >> >> - Introduced (lambda) functions and formula-local variables. >> - Added let construct <http://localhost:8080/#LetConstruct> for >> making local variables. >> - Added function declaration <http://localhost:8080/#Function>. >> Closures are not supported yet. >> - Added map function <http://localhost:8080/#Functions> for >> manipulating array elements. >> - Improved number formatting. >> - Default number formatting no longer displays tiny imprecisions. >> - Number formats may be specified with numeral.js >> <http://numeraljs.com/>, enabling thousands separators, k/m/b >> notation and greater control over digits. >> - *Renamed some FormulaWidget >> <http://localhost:8080/#FormulaWidget> and FormulaVarsWidget >> <http://localhost:8080/#FormulaVarsWidget> attributes.* >> - Original number formatting can still be used by specifying >> precision (no value). >> - Enhanced support for imported values. >> - Added Functions <http://localhost:8080/#Functions> for importing >> values as text: transclude, transclude_index, variable >> - Added datum function for interpreting text as a Datum >> <http://localhost:8080/#Datum>. >> - *Datum parsing now recognizes qualifying 14- and 17-digit >> numbers as TiddlyWiki dates.* (eg. created & modified fields). >> - *Widgets now display errors in the TiddlyWiki style*, like this. >> - $formula-vars will display any errors instead of its normal >> content. >> - $formula uses tc-error styling. >> - *Value conversion behaviors have changed.* >> - Non-array values will not be treated as single-element arrays. >> - Enhanced array functions sum, average, product and count. >> - Multi-dimensional array values are properly supported. >> - *count ignores empty values.* >> - New function counta counts empty values. >> - Internal implementation was changed. *This will break >> customizations.* >> - Consolidated "Node" type replaces Operator, Operand and Value. >> - Removed Value "boxing" and percentage values. >> - Implemented a new type cast mechanism, making custom JavaScript >> functions simpler to write. >> - Computation now uses a "context" object. >> - Fixed doc error: $noRebuild option is not called $noRefresh >> - The substitute and trim functions now process all occurrences, not >> just one. >> - Fixed implementation of the modulo function. >> - *The % operator no longer affects display style.* >> - Use a format string instread. >> - *+, -, add and subtract no longer auto-sum their operands.* >> - Use sum instead. >> >> >> General remarks: This makes formula a lot more powerful, especially for >> iterating through arrays with the MAP function. I might investigate even >> more flexible ways to use that later. The absence of proper closures does >> make functions and locals less useful as they could be, as local variables >> can't currently be used inside the function supplied to MAP. >> >> For a simple example of a computation that wasn't possible before, see >> the Line Graph demo: http://localhost:8080/#Demo%3A%20Line%20Graph >> >> >> On Saturday, 13 January 2018 15:25:29 UTC-6, coda coder wrote: >>> >>> Ah, the joys of IEEE-754... >>> >>> <$if "anyone wants to see the gory details of fp in javascript (and a >>> slew of other languages all of which are dependent on today's CPUs)"> >>> https://www.h-schmidt.net/FloatConverter/ >>> </$if> >>> >>> :) >>> >>> On Saturday, January 13, 2018 at 2:09:28 PM UTC-6, Evan Balster wrote: >>>> >>>> Hey, all — >>>> >>>> I get 5.6000000000000005 as a result (instead of 5.6). >>>>> >>>> >>>> Right now formula uses the JavaScript style for displaying numbers by >>>> default, and it's pretty terrible. The inaccuracy is "floating point" >>>> error and any reasonable system would round it off somehow. To get rid of >>>> it, refer to the "fixed" and "precision" options in FormulaWidget: >>>> http://evanbalster.com/tiddlywiki/formulas.html#FormulaWidget >>>> >>>> I'm probably going to change how numbers are formatted, likely using >>>> numeral.js <http://numeraljs.com/> or something like it. This is one >>>> of a few compatibility-breaking changes I'm thinking about for the big >>>> update. >>>> >>>> >>>> On Saturday, 13 January 2018 13:28:30 UTC-6, ste...@gmail.com wrote: >>>>> >>>>> Hi Evan, >>>>> >>>>> I just ran into a weird problem. When I enter >>>>> >>>>> (= sum(1.5,1.2,2,0.9) =) >>>>> >>>>> (= 2+1.2+0.9+1.5 =) >>>>> >>>>> I get 5.6000000000000005 as a result (instead of 5.6). If I change >>>>> the numbers slightly, I get the correct result. >>>>> >>>>> Is this a bug, or is there a well known explanation I'm not aware of? >>>>> >>>>> Kind regards, >>>>> >>>>> Stef >>>>> >>>> -- 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 tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. 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/25304495-dda7-44c1-ae87-71ebd8e660c0%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
