Ah, especially after your edit, I think I understand. So there's no problem if I leave comments like that (for my own learning enforcement, really) but mark them as spoilers?

Cheers, akar-0. No harm intended. I was just trying to leave a note on my own submitted solution regarding what I subsequently learned from someone else's submitted solution. Is this a bad way to do it, then? Should I not do this here at all, or should I do it but mark it as a spoiler, or...? I wasn't worried about really spoiling because I was commenting on my own submitted solution to the same problem. I'm new here; please advise, and I'll do it right from now on! :)

Please don't spoil solutions (your comments are visible to everyone from the dashboard, please use spoil flag).

Please don't spoil solutions (your comments are visible to everyone from the dashboard, please use spoil flag).

Is there a compelling reason for calling that particular identifier "expos"?

Excellent. Thank you for spelling this out for me.