listwalk/2—runs instructions against each element in a list

The listwalk/2 operation runs instructions against each element in a list. The syntax for this function is as follows:

listwalk($LIST,$ELEM)
$ELEM=listwalk($LIST)

listwalk/2 arguments

Use the listwalk/2 operation to go through each element in list $LIST, returning each element in $ELEM. All instructions following the call of listwalk/2 are executed for each element.

listwalk/2 example

$E.msg = 'Bad slot names:';
listwalk($E.mc_bad_slot_names,$SLTNM);
concat([$E.msg,' ',$SLTNM],$E.msg);

The msg slot is filled with the sequence of bad slot names.