I would like to represent a set in Perl. What I usually do is using a hash with some dummy value, e.g.:

my %hash=();
$hash{"element1"}=1;
$hash{"element5"}=1;

Then use if (defined $hash{$element_name}) to decide whether an element is in the set.

Is this a common practice? Any suggestions on improving this?

Also, should I use defined or exists?

Thank you

perl hash set
Edit
Report