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Grep searches one or more input files for lines containing a match to a specified pattern. By default, grep prints the matching lines.
Metrics updated 11 Oct 08
ack is a tool like grep, aimed at programmers with large trees of heterogeneous source code. ack is written purely in Perl, and takes advantage of the power of Perl's regular expressions. * Searches recursively through directories by default
Metrics updated 11 Oct 08
A grep replacement in pure Ruby. Use Ruby regular expression syntax and get highlighted output. Automatically recurses directories and excludes .svn/ pkg/ etc. Based on the Perl tool ack by Andy Lester.
Metrics updated 24 Jul 08