Thanks Eric. This is what I needed. Now, I can go further. I have several refrences to WCAG within each tiddler concerned, and I'd like to store them inside a tiddler field named "wcag21tech" and a typical contents would be "G8 G58 G78 G173 H96 SM1 SM2 SM6 SM7". This should be translated as a list of hyperlinks "G8", "G58", etc by the same rules than wcagTechUrl, but wcagTechUrl is a macro and not a list. I have seen that the macro filter "subfilter" can really be a "map" function and I would then need to write a filter in javascript to be able to use subfilter to generate a list of hyperlink from a list of referencess.
I don't know how to cal a macro from each member of the array that would be derived from my wcag21tech. It seems to be totally out of question. So really I need to write that javascript filter. I think this filter should return an array of wikitext and not an iterator function. But this is quite new stuff for me. So I decided to begin small with q very very simple filter that always return an array of a single string which is always "fubar". I read https://tiddlywiki.com/dev/ "Filter Operators" to start this. But from then on, I think I will have to be in the dev list for building filters, won't I? Le lundi 21 septembre 2020 à 01:54:56 UTC+2, Eric Shulman a écrit : > On Sunday, September 20, 2020 at 3:30:48 PM UTC-7, Jean-Pierre Rivière > wrote: >> >> I want to generate URL. The aim would be to generate something like that: >> [[G8|https://www.w3.org/WAI/WCAG21/Techniques/general/G8]] >> [[H96|https://www.w3.org/WAI/WCAG21/Techniques/html/H96]] >> with G8 or H96 a input. >> > > Here's one way to make your code work: > \define wcagTechUrl(ref) > <$set name="place01" filter="[[$ref$]prefix[G]then[general]]"> > <$set name="place02" filter="[[$ref$]prefix[H]then[html]]"> > <$set name="url" filter="[[https://www.w3.org/WAI/WCAG21/Techniques/]] > [<place01>] [<place02>] [[/$ref$]] +[join[]]"> > <<wcagTechUrl_makelink "$ref$">> > </$set></$set></$set> > \end > > \define wcagTechUrl_makelink(ref) [[$ref$|$(url)$]] > > which can be invoked like this: > <<wcagTechUrl G8>> > > Note the brackets used in the filter expressions: [[...]] surrounds > literal text, and [<...>] surrounds variables. > Note also the makelink() helper macro to construct the "pretty link" > wikitext output. > > You could also write the filter using "addsuffix[...]" operators instead > of using "join[]", like this: > <$set name="url" filter="[[ > https://www.w3.org/WAI/WCAG21/Techniques/]addsuffix<place01>addsuffix > <place02>addsuffix[/$ref$]]"> > > Another alternative (and perhaps the simplest) is to skip the filter > syntax entirely and use macro substitution handling in the makelink() > helper macro to construct the URL and wikitext link syntax in one go, like > this: > \define wcagTechUrl(ref) > <$set name="place01" filter="[[$ref$]prefix[G]then[general]]"> > <$set name="place02" filter="[[$ref$]prefix[H]then[html]]"> > <<wcagTechUrl_makelink "$ref$">> > </$set> > </$set> > \end > \define wcagTechUrl_makelink(ref) [[$ref$|https:// > www.w3.org/WAI/WCAG21/Techniques/$(place01)$$(place02)$/$ref$]] > > enjoy, > -e > -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/37382020-159a-4efb-99c4-bdae8c5ecf58n%40googlegroups.com.
