On the registration page: 7. Blank usernames and passwords are NOT allowed. I guess a single space isn't technically 'blank' but it sort of is. :) I was going to also try testing leaving comments but you have those blocked on posts that are older than x days old and the latest one is from ~5 years... more
You're right! I bet I run a trim whitespace and it leaves- Puckdropper,Wed Aug 30 2023 4:49pm
For strings? Java also has someString.isBlank() which returns true if the string is empty or only spaces. In Perl you can do something like: if ($some_string =~ m/^\s+$/) { # you gotta blank string }