http://worldfamos.blogspot.com/2009/04/reverse-100-gb-file.html
I just ran across this. I seem to remember someone asking about changing the order of certain phrases some time ago. On Fri, Apr 3, 2009 at 12:16 PM, Patrick Pippen <[email protected]>wrote: > > On Thu, Apr 2, 2009 at 6:26 PM, Robert Citek <[email protected]> > wrote: > > > > In a list of words, what regular expression will find all five-letter > > words that begin with "b" and do not end with the same last two > > characters? > > > > Here's a regular expression that will find all five-letter words that > > begin with "b" and do end with the same last two characters: > > > > $ egrep -i '^b..(.)\1$' /usr/share/dict/words > > Bragg > > Brett > > Britt > > bless > > bliss > > bluff > > brass > > > Robert, I wondered that myself. > > But is there a way to do this in a single regular expression? > > Sorry, for the late response but playing around with this the last > half-hour yielded this. > $ grep -ic '^b.\(.\).\1$' /usr/share/dict/words > 16 > > $ grep -i '^b.\(.\).\1$' /usr/share/dict/words > Beebe > Benin > Bioko > Bunin > barer > bases > basis > basks > basts > bests > bided > boded > borer > bus's > buses > busts > > Thanks for the challenge, Robert. > > -- > () ascii ribbon campaign - against html mail > /\ - against microsoft attachments > > you must know the ledge of wise and dome to understand your culture of > freedom! > > http://pxpippen.blogspot.com/ > > Powerfull Allah > > > > --~--~---------~--~----~------------~-------~--~----~ Central West End Linux Users Group (via Google Groups) Main page: http://www.cwelug.org To post: [email protected] To subscribe: [email protected] To unsubscribe: [email protected] More options: http://groups.google.com/group/cwelug -~----------~----~----~----~------~----~------~--~---
