Jon Wong schrieb am 12.09.2019 um 15:44:

Hi all,

If I use iffirstargument, the optional (first argument) is always seen as false.

If I use doifsomething, it works, but the “else” part is never executed when it should.

MWE:

\starttext

% \def\MyRow{\dosingleempty\doMyRow} % \def\doMyRow[#1]#2#3#4#5{% % \bTR \bTD #2 \eTD % The \bTD command for the cell content has an optional argument which changes the value of the firstargument conditional and your check below uses the result from \bTD. % \iffirstargument % \bTD Replaced! \eTD % % \else % \bTD #3 \eTD % % \fi % \bTD #4 \eTD \bTD #5 \eTD \eTR % }

\def\MyRow{\dosingleempty\doMyRow} \def\doMyRow[#1]#2#3#4#5{% \bTR \bTD #2 \eTD % \doifsomething{#1} \doifsomethingelse{#1} {\bTD Replaced! \eTD }% {\bTD #3 \eTD }% \bTD #4 \eTD \bTD #5 \eTD \eTR }

\bTABLE \bTABLEbody \MyRow{A}{B}{C}{D} \MyRow[optional]{A}{B}{C}{D} \eTABLEbody \eTABLE

\stoptext Wolfgang