How about this?

perl -pe'open _,file2;0+$_~~[<_>]or$_=""' file1

47 chars, versus 91 (84, removing unnecessary whitespace). This one's definitely "just for fun", though, due to now-experimental smartmatch and re-reading of file2.

In reply to Re^2: extract line by rjt
in thread extract line by lallison

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