I’ve been a Perl Monk in training for years, but I only just realised this.
Say you want to print an original string, and a modified version with a case-insensitive substitution. This below will output “shimapan shima-melonpan”, just because I can.
my $first = "shimapan" my $second = $first; $second =~ s/pan/-melonpan/i; print("$first $secondn");
You can use “r” instead to non-destructively substitute, with the same result.
my $first = "shimapan" my $second = $first =~ s/pan/melonpan/ir; print("$first $secondn");
I generally avoid Perl Golf-isms for the same reasosn Dagolden does, but in this case I find it does remove a little redundancy, and is just as readable.
Thanks to @damncabbage for getting me to finally post this!