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Re: extract line

by Loops (Curate)
on Jul 20, 2013 at 18:38 UTC ( #1045460=note: print w/replies, xml ) Need Help??

in reply to extract line

Probably there is a shorter one liner than this:

perl -F: -ane 'BEGIN {open K, "<file2"; $h{0+$_}=1 for <K>} print if e +xists $h{$F[0]}' file1

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Re^2: extract line
by rjt (Deacon) on Jul 20, 2013 at 20:56 UTC

    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.

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