here is a liner I use to find reverse complementary / palindromic D|RNA sequences (thought this would be up your alley because of your sig.) : 
perl -nle 'tr/A-Z/a-z/;$m=length();reverse(substr($_,($m/2)+($m%2))) e
+q substr($_,0,$m/2) ? print : next'  /file/of/sequences/one_per_line

[download]
works on any list of "words" tho ... /usr/share/dict/words, etc.

update: ... this node_id has 2X \d{3} palindromes and my username is a palindrome ...

In reply to Re: What one-liners do people actually use? by l3v3l
in thread What one-liners do people actually use? by TomDLux

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