Ruby has that. But you have to be careful that your code stays readable. I know that's not a concern for Perl. :-) Although the "unless" case very often trips

Ruby has that. But you have to be careful that your code stays readable. I know that's not a concern for Perl. :-) Although the "unless" case very often trips me. Somehow my brain can't parse that correctly and I've found that surprisingly many work colleagues have the same problem.