This best practice is a simple suggestion: Put every raw list in parenthesis. It’s good.The book provides an example of why this is important. There’s at least one other case that bit me at the office:
for my $bar qw/ one two three four / {
print "$bar is yay!\n";
}
This changed, so that qw no longer worked as a list with for, and you needed to add parens to make the for loop use the list:
for my $bar (qw/ one two three four /) {
print "$bar is yay!\n";
}
We had old crufty code that did this at work, which we had to clean up.
I did find a blog post where the poster was extremely unhappy about this change. I could not understand his ire then, and don’t now, even though I had to actively make code changes to allow the bug.
Anyway, use those list parens. (The example I gave isn’t great, because it isn’t actually a list paren, but it looks like one.)