Thank you, Bill Joy!

[John Young]

> In article <2323 at munnari.oz>, kre at 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....