* How to let a macro check the previous value of #1 the last time the same macro was called? [not found] <1050338993.1893942.1641737797345.ref@mail.yahoo.com> @ 2022-01-09 14:16 ` Joel via ntg-context 2022-01-09 15:03 ` Wolfgang Schuster via ntg-context 0 siblings, 1 reply; 7+ messages in thread From: Joel via ntg-context @ 2022-01-09 14:16 UTC (permalink / raw) To: ntg-context; +Cc: Joel [-- Attachment #1.1: Type: text/plain, Size: 798 bytes --] Is there a way for a macro to check the previous value of #1, the last time that same macro was called? Here is a minimum working example, pretending that `\previousvalue` is equal to #1 from the last time the same macro was called: \define[1]\mymacro{ \if\previousvalue=#1 same as last time \else it is different from last time \fi } \starttext \mymacro{cat} \mymacro{cat} \mymacro{mouse} \mymacro{mouse} \mymacro{cat} \stoptext This would print: it is different from last time <--it was never called previously same as last time it is different from last time same as last time it is different from last time --Joel [-- Attachment #1.2: Type: text/html, Size: 1285 bytes --] [-- Attachment #2: Type: text/plain, Size: 493 bytes --] ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: How to let a macro check the previous value of #1 the last time the same macro was called? 2022-01-09 14:16 ` How to let a macro check the previous value of #1 the last time the same macro was called? Joel via ntg-context @ 2022-01-09 15:03 ` Wolfgang Schuster via ntg-context 2022-01-10 8:52 ` Henning Hraban Ramm via ntg-context 0 siblings, 1 reply; 7+ messages in thread From: Wolfgang Schuster via ntg-context @ 2022-01-09 15:03 UTC (permalink / raw) To: mailing list for ConTeXt users, Joel via ntg-context; +Cc: Wolfgang Schuster Joel via ntg-context schrieb am 09.01.2022 um 15:16: > Is there a way for a macro to check the previous value of #1, the last > time that same macro was called? > > Here is a minimum working example, pretending that `\previousvalue` is > equal to #1 from the last time the same macro was called: > > [...] To check is the current value differs from the last one you need a temp macro where you store the current value at the end of your command to check it in the next call. \let\previousmymacro\empty \define[1]\mymacro {\edef\currentmymacro{#1}% \ifx\previousmymacro\currentmymacro same as last time \else it is different from last time \fi \let\previousmymacro\currentmymacro} \starttext \startlines cat: \mymacro{cat} cat: \mymacro{cat} mouse: \mymacro{mouse} mouse: \mymacro{mouse} cat: \mymacro{cat} \stoplines \stoptext Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: How to let a macro check the previous value of #1 the last time the same macro was called? 2022-01-09 15:03 ` Wolfgang Schuster via ntg-context @ 2022-01-10 8:52 ` Henning Hraban Ramm via ntg-context 2022-01-10 19:21 ` Wolfgang Schuster via ntg-context 0 siblings, 1 reply; 7+ messages in thread From: Henning Hraban Ramm via ntg-context @ 2022-01-10 8:52 UTC (permalink / raw) To: ntg-context; +Cc: Henning Hraban Ramm Am 09.01.22 um 16:03 schrieb Wolfgang Schuster via ntg-context: > Joel via ntg-context schrieb am 09.01.2022 um 15:16: >> Is there a way for a macro to check the previous value of #1, the last >> time that same macro was called? > > To check is the current value differs from the last one you need a temp > macro where you store the current value at the end of your command to > check it in the next call. Would it make more sense, or would it be “cleaner” to use a variable? Hraban ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: How to let a macro check the previous value of #1 the last time the same macro was called? 2022-01-10 8:52 ` Henning Hraban Ramm via ntg-context @ 2022-01-10 19:21 ` Wolfgang Schuster via ntg-context 2022-01-10 23:15 ` Henning Hraban Ramm via ntg-context 0 siblings, 1 reply; 7+ messages in thread From: Wolfgang Schuster via ntg-context @ 2022-01-10 19:21 UTC (permalink / raw) To: mailing list for ConTeXt users, Henning Hraban Ramm via ntg-context Cc: Wolfgang Schuster Henning Hraban Ramm via ntg-context schrieb am 10.01.2022 um 09:52: > Am 09.01.22 um 16:03 schrieb Wolfgang Schuster via ntg-context: >> Joel via ntg-context schrieb am 09.01.2022 um 15:16: >>> Is there a way for a macro to check the previous value of #1, the >>> last time that same macro was called? >> >> To check is the current value differs from the last one you need a >> temp macro where you store the current value at the end of your >> command to check it in the next call. > > Would it make more sense, or would it be “cleaner” to use a variable? You can get rid of the temp variable before the command definition but now you have to access it with a different method in \mymacro, below is one way (LMTX only) but \setvariable and \getvariable work as well. \define[1]\mymacro {\iftok{#1}{\getvalue{previousmymacro}}% same as last time \else it is different from last time \fi \setvalue{previousmymacro}{#1}} Wolfgang ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: How to let a macro check the previous value of #1 the last time the same macro was called? 2022-01-10 19:21 ` Wolfgang Schuster via ntg-context @ 2022-01-10 23:15 ` Henning Hraban Ramm via ntg-context 2022-01-11 4:22 ` Aditya Mahajan via ntg-context 0 siblings, 1 reply; 7+ messages in thread From: Henning Hraban Ramm via ntg-context @ 2022-01-10 23:15 UTC (permalink / raw) To: mailing list for ConTeXt users; +Cc: Henning Hraban Ramm Am 10.01.22 um 20:21 schrieb Wolfgang Schuster: > Henning Hraban Ramm via ntg-context schrieb am 10.01.2022 um 09:52: >> Would it make more sense, or would it be “cleaner” to use a variable? > > You can get rid of the temp variable before the command definition but > now you have to access it with a different method in \mymacro, below is > one way (LMTX only) but \setvariable and \getvariable work as well. > > \define[1]\mymacro > {\iftok{#1}{\getvalue{previousmymacro}}% > same as last time > \else > it is different from last time > \fi > \setvalue{previousmymacro}{#1}} That was the approach that I meant. Thank you. But would you consider one way to be better? Hraban ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: How to let a macro check the previous value of #1 the last time the same macro was called? 2022-01-10 23:15 ` Henning Hraban Ramm via ntg-context @ 2022-01-11 4:22 ` Aditya Mahajan via ntg-context 2022-01-11 8:20 ` Hans Hagen via ntg-context 0 siblings, 1 reply; 7+ messages in thread From: Aditya Mahajan via ntg-context @ 2022-01-11 4:22 UTC (permalink / raw) To: Henning Hraban Ramm via ntg-context; +Cc: Aditya Mahajan [-- Attachment #1: Type: text/plain, Size: 1430 bytes --] On Tue, 11 Jan 2022, Henning Hraban Ramm via ntg-context wrote: > Am 10.01.22 um 20:21 schrieb Wolfgang Schuster: > > Henning Hraban Ramm via ntg-context schrieb am 10.01.2022 um 09:52: > >> Would it make more sense, or would it be “cleaner” to use a variable? > > > > You can get rid of the temp variable before the command definition but > > now you have to access it with a different method in \mymacro, below is > > one way (LMTX only) but \setvariable and \getvariable work as well. > > > > \define[1]\mymacro > > {\iftok{#1}{\getvalue{previousmymacro}}% > > same as last time > > \else > > it is different from last time > > \fi > > \setvalue{previousmymacro}{#1}} > > That was the approach that I meant. Thank you. > > But would you consider one way to be better? Just for fun: lua code \startluacode local previous = nil interfaces.implement { name = "mymacro", public = true, arguments = "string", actions = function (current) if current == previous then context("same as last time") else context("Different!") end previous = current end, } \stopluacode \starttext \startlines cat: \mymacro{cat} cat: \mymacro{cat} mouse: \mymacro{mouse} mouse: \mymacro{mouse} cat: \mymacro{cat} \stoplines \stoptext Aditya [-- Attachment #2: Type: text/plain, Size: 493 bytes --] ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: How to let a macro check the previous value of #1 the last time the same macro was called? 2022-01-11 4:22 ` Aditya Mahajan via ntg-context @ 2022-01-11 8:20 ` Hans Hagen via ntg-context 0 siblings, 0 replies; 7+ messages in thread From: Hans Hagen via ntg-context @ 2022-01-11 8:20 UTC (permalink / raw) To: mailing list for ConTeXt users; +Cc: Hans Hagen On 1/11/2022 5:22 AM, Aditya Mahajan via ntg-context wrote: > On Tue, 11 Jan 2022, Henning Hraban Ramm via ntg-context wrote: > >> Am 10.01.22 um 20:21 schrieb Wolfgang Schuster: >>> Henning Hraban Ramm via ntg-context schrieb am 10.01.2022 um 09:52: >>>> Would it make more sense, or would it be “cleaner” to use a variable? >>> >>> You can get rid of the temp variable before the command definition but >>> now you have to access it with a different method in \mymacro, below is >>> one way (LMTX only) but \setvariable and \getvariable work as well. >>> >>> \define[1]\mymacro >>> {\iftok{#1}{\getvalue{previousmymacro}}% >>> same as last time >>> \else >>> it is different from last time >>> \fi >>> \setvalue{previousmymacro}{#1}} >> >> That was the approach that I meant. Thank you. >> >> But would you consider one way to be better? > > Just for fun: lua code > > \startluacode > local previous = nil > > interfaces.implement { > name = "mymacro", > public = true, > arguments = "string", > actions = function (current) > if current == previous then > context("same as last time") > else > context("Different!") > end > previous = current > end, > } > > \stopluacode > > \starttext > > \startlines > cat: \mymacro{cat} > cat: \mymacro{cat} > mouse: \mymacro{mouse} > mouse: \mymacro{mouse} > cat: \mymacro{cat} > \stoplines > > \stoptext keep in mind that what you do is global (probably what one wants here): \startlines cat: \mymacro{cat} cat: \mymacro{cat} {mouse: \mymacro{mouse}} {mouse: \mymacro{mouse}} cat: \mymacro{cat} \stoplines ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-01-11 8:20 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <1050338993.1893942.1641737797345.ref@mail.yahoo.com> 2022-01-09 14:16 ` How to let a macro check the previous value of #1 the last time the same macro was called? Joel via ntg-context 2022-01-09 15:03 ` Wolfgang Schuster via ntg-context 2022-01-10 8:52 ` Henning Hraban Ramm via ntg-context 2022-01-10 19:21 ` Wolfgang Schuster via ntg-context 2022-01-10 23:15 ` Henning Hraban Ramm via ntg-context 2022-01-11 4:22 ` Aditya Mahajan via ntg-context 2022-01-11 8:20 ` Hans Hagen via ntg-context
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