in reply to What one-liners do people actually use?

  1. Anything with the -i flag - that's how I started using perl (when sed/awk wasn't enough).
  2. perl -MData::Dumper -MSome::Module -e "print Dumper [Some::Module->new()->mytest(@ARGV)]" parm1 parm2 etc to test either how some other module works, or to test how my new code is working - a little bit easier/faster than doing full tests when I'm still developing. Or I use it to show my subordinate how to use an API and what it produces when we're sharing a desktop via VNC.