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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.help
Subject: Re: Newbie: Submit whole buffer and capture output
Date: Tue, 18 Dec 2007 06:28:25 +0200
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> From: "Matthew.Pettis@gmail.com" <Matthew.Pettis@gmail.com>
> Date: Mon, 17 Dec 2007 06:33:28 -0800 (PST)
> 
> I code perl scripts, and I want to find out how to submit a whole
> buffer (with a shebang at top) to the shell and capture the output
> somewhere in Emacs -- probably the *command shell* window, which I
> know nothing about other than the name.

You want "M-|".  Invoke Perl in a way that makes it read the script
from its standard input.