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