perl one-liner like grep?

Question

i\'d like perl to do a one-liner like grep

a bit like this, but i\'m not sure what to add to make it work

$ (echo a ; echo b ; echo c) | per         


        

Answer 1

To echo mob's comment:

If you want to use Perl regexes try ack: http://betterthangrep.com/

Answer 2

(echo a; echo b; echo c) | perl -ne 'print if /a/'

Answer 3

You can do the same with Ruby, if you can afford other options

$ (echo a; echo b; echo c) | ruby -ne 'print if /a/'
a
$ (echo a; echo b; echo c) | ruby -ne 'print if $_["a"]'
a