Path: utzoo!utgpu!water!watmath!clyde!att!whuts!homxb!hropus!jgy
From: jgy@hropus.UUCP (John Young)
Newsgroups: comp.unix.wizards
Subject: Re: Thank you, Bill Joy!
Message-ID: <287@hropus.UUCP>
Date: 6 Sep 88 02:17:25 GMT
References: <2323@munnari.oz> <2662@uvacs.CS.VIRGINIA.EDU>
Organization: Bell Labs, Holmdel, NJ
Lines: 19

> In article <2323@munnari.oz>, kre@munnari.oz (Robert Elz) writes:
> > What is needed is a way to do
> > 
> > 	ls /a >/tmp/file
> > 	ls /b | comm - !$
> > or
> > 	echo old*
> > 	rm !$
> > 
> > neither of which will do anything like what you want if you replace
> > csh with ksh and !$ with $_

How about this (in ksh)

	comm <(ls /a) <(ls /b)

No temporary files, no !$'s or $_'s etc....

Of course you need the /dev/fd driver but....