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Comparing two files and noting matches


 
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# 1  
Old 11-19-2001
Comparing two files and noting matches

I have two files. One contains names and another file (66 MB, ASCII format) contains details of persons. How do I compare the names in the first file with the second file and write the matches to a third file. I would prefer this to be solved in UNIX or VB.

Thanks.
# 2  
Old 11-19-2001
IN UNIX: I would be looking at...

The sort, uniq and diff commands.

Without much detail I guess you would have to sort the names in the two files, then diff the two files and use the redirect (&gtSmilie to write them to a single (3rd) file.

ie diff file1 file2 > file3

Uniq would be used to remove fields that occur more than once, if that is what you want.

Try the man pages!

I hope this is of help.
Shakey21
# 3  
Old 11-20-2001
Well, I can't give much better of a suggestion, but you may need to be careful of this solution... For example, say your list of names is like this:
Code:
List 1           List 2
---------        ---------
Aaron            Aaron
Bernie           Bernie
Carl             Carl
Daryl            Jim
Jim              Mark
Mark             Nick
Nick             Sarah
........

Since list 2 does not have Daryl in it, everything after that will show as an error, unless list 1 skips a name also...

Also, misspellings may give random errors as well...

This seems like a Perl or Awk problem, but I can't think of a way to tackle it...
 

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