Why does this not work...

[sbgirl54]

This doesn't work:

awk '
      NR == FNR
      { x=$1 ; next }
      { y=$1 }
      {if (x==y) print $0}
    '  file1.in catalog.cat > file2.res

I'm trying to make a list of catalog entries that match the line headers in file1. The program instead outputs a copy of file1. That doesn't make much sense...

 

[PHV]

What about this ?

awk 'NR==FNR{x[$1];next}$1 in x' file1.in catalog.cat > file2.res

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[sbgirl54]

That works, and it's clever Thanks

 

[Annihilannic]

The reason you ended up with a copy of file1.res in file2.res with your original solution is the "NR == FNR" line. Because it isn't followed by a code block on the same line, the default action when that expression is true is to print the current input line. The rest of your code wasn't generating any output.

Annihilannic
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