find words with grep....


 
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# 1  
Old 04-06-2006
find words with grep....

I have a .txt file which contains several lines of text. I need to write a script program using grep or any other unix tool so as to detect part of the text (words) between / / that begin with the symbol ~.
For example if somewhere in the text appears a webpage address like
http://www.cs.may.ie/~dtray/cs211/lecture1.htm,
my program must print only the word dtray (the symbol ~ must be ommited)
# 2  
Old 04-06-2006
Is this a homework assignment?
# 3  
Old 04-06-2006
I would grep lines containing the keywords, and pipe to a cut.
# 4  
Old 04-06-2006
Quote:
Originally Posted by DrRo183
I would grep lines containing the keywords, and pipe to a cut.
care to provide an example?
# 5  
Old 04-07-2006
well...what are the rules/conditions? Will every url be complete as submitted above?
# 6  
Old 04-07-2006
Quote:
Originally Posted by DrRo183
well...what are the rules/conditions? Will every url be complete as submitted above?
well..... that I don't know - we better ask the OP.

but how about these simple samples:
Code:
http://www.cs.may.ie/~dtray/cs211/lecture1.htm
http://www.cs.may.ie/foo/bar/~dtray/cs211/lecture1.htm
http://www.cs.may.ie/foo/~bar/~dtray/cs211/lecture1.htm
http://www.cs.may.ie/~foo~dtray/cs211/lecture1.htm

how would you do it with grep/cut?
# 7  
Old 04-07-2006
"http://www.cs.may.ie/~foo~dtray/cs211/lecture1.htm" <==what?

Ok, I give up. How to differentiate whether you want the first tilde, or the nth.
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