[anamoulous]

This is the kind of stuff that is great for shell scripting / one liners. I doubt they are ever going deprecate it. Maybe the best thing is to rewind your mind 30 minutes and pretend you never read about it : )

Example

    ruby -ne 'puts $1 if $_ =~ /^(([\d\.])+)/' < /etc/hosts

[toolz]

I knew things would make sense the more I learned about it. Thanks, TIL. Now I'll pretend I never knew about this so I'm never tempted to abuse it.