UNIX for Dummies Questions & Answers

Hello,
I am trying to use grep to locate multiple uses of the same word in the same line. The word has to be 3+ char, upper or lower or both.

I tried this code
<code>
grep \([A-Za-z]{3,}\)*\1 i*
</code>

and i turned out zero results. Any ideas?

____________________________________________
Also this is another problem that i have no idea where to start.

We can use regular expression search and replace tools (such as that provided by emacs) as a powerful tool for reorganizing data in a file. If you look at the file attached to this topic, you will see that it has the format:
TIME NAME COMMENT
Use search and replace tools to transform this into the following format:
[TIME] ***NAME*** COMMENT
In addition, convert all text of the form *text* to _text_, making sure not to delete single * 's.



~Thank Everyone
~Rob

`http://algorithmics.bu.edu/twiki/pub....de_output.txt that is the link for the attachment

In grep, you want to skip over any other words between the two hits. Remember, * simply means "zero or more of the preceding regular expression". So (abc)* means "" (zero repetitions!) or "abc" or "abcabc" or "abcabcabc" ... but not "abcfoo".

For search and replace, you probably want to use sed. Your instructor seems to also suggest Emacs as an alternative.

Please don't post homework; read the forum rules.

this might be the answer for your second question..

Code:

 
sed -e 's/\(\*\)\(.*\)\(\*\)\(.*\)/_\2_\4/g' -e 's/\(^[0-9][0-9]:[0-9][0-9]\)\( \)\(.[^ ]*\)\( [^.] *\)\(.*\)/\[\1\]***\3***\5/g' filename

Sorry about the homework post but my professor said that we can get the info from any public site. Thats the only reason. In this case it is not cheating...

It's not about cheating, it's about the usage rules for this site which you accepted when you signed up.

I agree with era, maybe your professor has his rules but we have our own.

Thread closed!