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April 2008

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Sender:
Macintosh Scripting Systems <[log in to unmask]>
Date:
Tue, 15 Apr 2008 13:09:55 -0400
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Macintosh Scripting Systems <[log in to unmask]>
Subject:
Re: searching and sorting
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<[log in to unmask]>
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From:
"Mark J. Reed" <[log in to unmask]>
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text/plain (8 lines) 
If I was right about the goal, here's one way to do it from the command line:

$ cat /file/with/just/numbers /file/with/pairs | awk '(NF==1)
{seen[$1]=1} (NF==2 && seen[$1]) {print}'

-- 
Mark J. Reed <[log in to unmask]>

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