Many thanks to Shlomi and Uri: as always, you’ve greatly boosted my understanding of Perl! — Rick
> On Jul 4, 2018, at 9:35 AM, Shlomi Fish <shlo...@shlomifish.org> wrote: > > Hi Rick, > > On Wed, 4 Jul 2018 09:16:19 -0500 > Rick T <p...@reason.net> wrote: > >> The following line works, even though I forgot to double quote the variable. >> >> my $student_directory = '/data/students/' . $student_id; >> > > see http://perl-begin.org/tutorials/bad-elements/#vars_in_quotes . Perl often > stringifies expressions even outside interpolation, such as when being > string-concatenated. > >> When I noticed this, I thought this was convenient: perl is trying to “do the >> right thing.” But I worry that leaving them out may be bad coding practice; >> if so, or you see other worthwhile improvements, please let me know. >> >> More importantly, I wonder how perl knows to do this. Perhaps context >> provided by the assignment operator or the concatenation operator? If there >> is a general rule on this, it would help me to know more widely when I can >> omit double quotes. >> >> Thanks! >> >> Rick Triplett > > > -- > ----------------------------------------------------------------- > Shlomi Fish http://www.shlomifish.org/ > First stop for Perl beginners - http://perl-begin.org/ > > After all is said and done, a hell of a lot more is said than done. > — Unclear source, via fortune-mod. > > Please reply to list if it's a mailing list post - http://shlom.in/reply . > > -- > To unsubscribe, e-mail: beginners-unsubscr...@perl.org > For additional commands, e-mail: beginners-h...@perl.org > http://learn.perl.org/ > > > -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
