One liners like this is why Perl has a reputation of being like line noise. I'm a big fan of Perl, but if any of my employees wrote this kind of write-only code, I'd fire them.
They could write highly maintainable, well tested, peer reviewed etc code to do the same things, but in this context that would be hugely wasteful, as the utilities already exist.
This is Perl as a replacement for Awk, not for Java.
Being able to create that line-noise is, in most cases, significantly more useful than taking 3 months to create a perfectly engineered recursive phone-number finding program.
It's possible you're actually not aware, so take this in the spirit it's intended: statements like this make you sound like a colossal blow-hard.