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Old 02-15-2012, 02:34 PM   #16
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Originally Posted by danielbmartin View Post
# Find words which contain
# at least 3 of the same character.
# Use sed to mimic grep.
cat < $WrdLst                    \
|sed -n '/\(.\).*\1.*\1/p'       \
> $Work09
You're almost there. The problem is the 'p' command will not modify the matching line.
You can combine it with 's', though.

sed -n 's/.*\(.\).*\1.*\1/\1 &/p'
where I used '&' to reference the entire matched expression. I also had to add a '.*' at the begining of my regex to match the begining of the word.
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Old 02-15-2012, 04:07 PM   #17
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Originally Posted by millgates View Post
sed -n 's/.*\(.\).*\1.*\1/\1 &/p'
Another home run for millgates! I hope you enjoy solving these character-string brain teasers. Thank you!

Daniel B. Martin


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