I would like to use $a and $b variables in my anonimous binary functions like it is done in sort {$a <=> $b} (1, 2, 3) but I can not figure out why code like #!/usr/bin/env perl use strict;...

I have stumbled across this sintax while reviewing a code in Ruby. The code is: if __FILE__ == $PROGRAM_NAME #some code... end I suppose __FILE__ is a variable that gets me the name of th...

I am wondering about how I can do in Perl what I commonly do in lisp: (defvar *verbose-level* 0) (defun my-function (... &key ((:verbose-level *verbose-level*) *verbose-level*) ...) ...) thi...

The documentation for Perl's close states that $. isn't reset if you use the implicit close done by open. I was trying to see exactly what this meant, but couldn't get it to happen. Here's my scrip...

I want to know the meaning of perl special variables $-[0] and $+[0] I have googled and found that $- represent number of lines left on the page and $+ represent the last bracket matched by the la...

Perl has quite a few special variables such as @F, $!, %! ... etc. Where are all Perl's special variables documented?