Ack is designed as a replacement for 99% of the uses of grep.
Ack is a really nice tool for searching your source code. It's faster than grep because he already knows what you want : searching your sources files :)
By default it will not search in SCM files (.git, .svn, ...), backups files (source.pl~, source.pl.bak, ...). You can specify what kind of files you want (
--cc, ...), make it match some regex with
And you can set some defaults configuration in a .ackrc file ! Mine looks like this:
--sort-files --color --context=1 --follow
Check also: vim with ack integration.
Oh, and it's the only program with