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Date: Thu, 21 Aug 2008 13:52:59 +0100
From: "Barry Byrne" <barry.byrne@wbtsystems.com>
To: "Steve Bertrand" <steve@ibctech.ca>
References: <48AD63B7.8090107@ibctech.ca>
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Cc: freebsd-questions@freebsd.org
Subject: Re: sed/awk, instead of Perl
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Quoting "Steve Bertrand" <steve@ibctech.ca>:

  few passes over a few files.
>
> To put it plainly, can anyone, if it's possible, provide a single  
> line sed/awk pipeline that can:
>
> - read email addresses from a file in the format:
>
> user.name TAB domain.tld
>
> - convert it to:
>
> user_name@example.com
>
> - write it back to either a new file, the original file, or to STDOUT
>
> Regards,

cat file.txt | ( while read user domain; do echo "$user@$domain"; done )

  - barry