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Why does this not work...

Why does this not work...

(OP)
This doesn't work:

CODE --> awk

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...

RE: Why does this not work...

(OP)
That works, and it's clever (: Thanks

RE: Why does this not work...

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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