G'day Alexander,

My intention was to show the variety of alternatives available. I would never expect the "... && ... && ..." to be used in a real program.

"# that's not perl: && ord($key) == 0o33"

Actually it is; however, it's very new. See "perl5340delta: New octal syntax 0oddddd".

I have Perl v5.34.0 installed. I checked my code with "perl -e 'use strict; use warnings; ...'" which would normally pick up things introduced since v5.8 (e.g. say). It's good to know that 0o33 passed on my installation without including a "use 5.034;" statement; I'll keep an eye on that in other code. Thanks for spotting this.