How can I convert Perl one-liners into complete scripts?

Question

I find a lot of Perl one-liners online. Sometimes I want to convert these one-liners into a script, because otherwise I\'ll forget the syntax of the one-liner.

For e

Answer 1

There are some good answers here if you want to keep the one-liner-turned-script around and possibly even expand upon it, but the simplest thing that could possibly work is just:

#!/usr/bin/perl -p
s/(\d+)/localtime($1)/e

Perl will recognize parameters on the hashbang line of the script, so instead of writing out the loop in full, you can just continue to do the implicit loop with -p.

But writing the loop explicitly and using -w and "use strict;" are good if plan to use it as a starting point for writing a longer script.