@cks [BTW, I believe you left out 'list in front of "-or" in your solution.] I… mastodon / lispwizard@techhub.social ---------------------------------------------------------------------- lispwizard · 2023-09-26 08:54 @cks [BTW, I believe you left out 'list in front of "-or" in your solution.]I would have written it with 'cl loop macro instead, viz.: (cdr (loop for item in l appending (list "-or" item thing)))which seems clearer to me (not to mention more efficient because of not having to call the lambda function).