Blog post: Perl's Constant Pragma and Readonly Module - DEV Community
laravel custom constants Code Example
Perl Introduction
Linux perl pragmas help and examples
String (computer science) - Wikipedia
Perl - Wikipedia
Exposing Hidden Exploitable Behaviors in Programming Languages Using Differential Fuzzing
Constant strings representing a number can BECOME numbers · Issue #6266 · Perl/perl5 · GitHub
Demonstrating PERL with Tic-Tac-Toe, Part 1 - Fedora Magazine
Variables, Constants, and Arithmetic – perlpatterson
Perl2Exe back to Perl – 2014 | Thice.nl
PERL By C. Shing ITEC Dept Radford University. Objectives Understand the history Understand constants and variables Understand operators Understand control. - ppt download