* Determining that a Pandoc Variable is the Empty String @ 2023-03-08 4:41 S. Manning [not found] ` <baea52e4f4b9a22d832faa30ab3fd116-aFO/2INALiozYggVrLCuDg@public.gmane.org> 0 siblings, 1 reply; 3+ messages in thread From: S. Manning @ 2023-03-08 4:41 UTC (permalink / raw) To: Pandoc discuss I would like to add a tag system to my static site which I generate with Pandoc templates. Adding a tags: variable in myPage.yaml is easy, but then I want to add links from pages with the tag to the page for that tag. Code like: $for(tags)$ <a href="https://mysite.org/tags/$tags$.html">⇐ back to $tags$</a> $endfor$ adds a link even if the tags variable is empty ("tags: " in the YAML file). How can I check that the tag is not empty or a null string or however Pandoc defines it? https://pandoc.org/MANUAL.html#interpolated-variables alludes to variable types such as string and list, but does not define them or explain how to get the attributes of complex variables such as lists. -- You received this message because you are subscribed to the Google Groups "pandoc-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/baea52e4f4b9a22d832faa30ab3fd116%40ageofdatini.info. ^ permalink raw reply [flat|nested] 3+ messages in thread
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* Re: Determining that a Pandoc Variable is the Empty String [not found] ` <baea52e4f4b9a22d832faa30ab3fd116-aFO/2INALiozYggVrLCuDg@public.gmane.org> @ 2023-03-08 4:44 ` John MacFarlane [not found] ` <DA455835-3B72-4022-A761-E7A96E904EEA-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 0 siblings, 1 reply; 3+ messages in thread From: John MacFarlane @ 2023-03-08 4:44 UTC (permalink / raw) To: pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw Try tags: [] in your YAML if you don't want the for loop to be executed. > On Mar 7, 2023, at 8:41 PM, S. Manning <scriptor-aFO/2INALiozYggVrLCuDg@public.gmane.org> wrote: > > I would like to add a tag system to my static site which I generate with Pandoc templates. Adding a tags: variable in myPage.yaml is easy, but then I want to add links from pages with the tag to the page for that tag. Code like: > > $for(tags)$ > <a href="https://mysite.org/tags/$tags$.html">⇐ back to $tags$</a> > $endfor$ > > adds a link even if the tags variable is empty ("tags: " in the YAML file). > > How can I check that the tag is not empty or a null string or however Pandoc defines it? > > https://pandoc.org/MANUAL.html#interpolated-variables alludes to variable types such as string and list, but does not define them or explain how to get the attributes of complex variables such as lists. > > -- > You received this message because you are subscribed to the Google Groups "pandoc-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org > To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/baea52e4f4b9a22d832faa30ab3fd116%40ageofdatini.info. -- You received this message because you are subscribed to the Google Groups "pandoc-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/DA455835-3B72-4022-A761-E7A96E904EEA%40gmail.com. ^ permalink raw reply [flat|nested] 3+ messages in thread
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* Re: Determining that a Pandoc Variable is the Empty String [not found] ` <DA455835-3B72-4022-A761-E7A96E904EEA-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> @ 2023-03-08 4:50 ` S. Manning 0 siblings, 0 replies; 3+ messages in thread From: S. Manning @ 2023-03-08 4:50 UTC (permalink / raw) To: pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw That works for me! I will add it to my 'lab notes' On 2023-03-07 21:44, John MacFarlane wrote: > Try > > tags: [] > > in your YAML if you don't want the for loop to be executed. > >> On Mar 7, 2023, at 8:41 PM, S. Manning <scriptor-aFO/2INALiozYggVrLCuDg@public.gmane.org> >> wrote: >> >> I would like to add a tag system to my static site which I generate >> with Pandoc templates. Adding a tags: variable in myPage.yaml is >> easy, but then I want to add links from pages with the tag to the page >> for that tag. Code like: >> >> $for(tags)$ >> <a href="https://mysite.org/tags/$tags$.html">⇐ back to >> $tags$</a> >> $endfor$ >> >> adds a link even if the tags variable is empty ("tags: " in the YAML >> file). >> >> How can I check that the tag is not empty or a null string or however >> Pandoc defines it? >> >> https://pandoc.org/MANUAL.html#interpolated-variables alludes to >> variable types such as string and list, but does not define them or >> explain how to get the attributes of complex variables such as lists. >> >> -- >> You received this message because you are subscribed to the Google >> Groups "pandoc-discuss" group. >> To unsubscribe from this group and stop receiving emails from it, send >> an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/pandoc-discuss/baea52e4f4b9a22d832faa30ab3fd116%40ageofdatini.info. -- You received this message because you are subscribed to the Google Groups "pandoc-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/27db87ff42ad3fe1822144a366498919%40ageofdatini.info. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-03-08 4:50 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-03-08 4:41 Determining that a Pandoc Variable is the Empty String S. Manning [not found] ` <baea52e4f4b9a22d832faa30ab3fd116-aFO/2INALiozYggVrLCuDg@public.gmane.org> 2023-03-08 4:44 ` John MacFarlane [not found] ` <DA455835-3B72-4022-A761-E7A96E904EEA-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2023-03-08 4:50 ` S. Manning
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