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Why does this not work...

Why does this not work...

Why does this not work...

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...

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.

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