Then you should immediately familiarise yourself with it, and its sister module Scalar::Util. They are two of the most useful modules included in the Perl core.
In reply to Re^3: Best way to sum an array?
by tobyink
in thread Best way to sum an array?
by Anonymous Monk
| For: | Use: | ||
| & | & | ||
| < | < | ||
| > | > | ||
| [ | [ | ||
| ] | ] |