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From: tneff@bfmny0.UUCP (Tom Neff)
Newsgroups: comp.bugs.sys5
Subject: Re: ksh bugs
Keywords: ksh
Message-ID: <14579@bfmny0.UUCP>
Date: 22 Aug 89 14:08:38 GMT
References: <10166@fluke.COM> <10450@fluke.COM> <177@uci.UUCP> <1035@virtech.UUCP> <14571@bfmny0.UU.NET> <1170@vsi.COM>
Reply-To: tneff@bfmny0.UU.NET (Tom Neff)
Distribution: na
Organization: ^
Lines: 25

In article <1170@vsi.COM> friedl@vsi.COM (Stephen J. Friedl) writes:
>In article <14571@bfmny0.UU.NET>, tneff@bfmny0.UU.NET (Tom Neff) writes:
>
>> 	export ENV='${Envfile[(_$-=1)+(_=0)-(_$-!=_${-%%*i*})]}'
>
>Hey, cool!  I didn't know that ksh had a built-in APL interpreter!
>
>P.S. - or is that sed script?

Actually it's a subscript expression, which evaluates to either $Envfile
or the null string depending on whether $- (the current flags) has an "i"
(for interactive) in it or not.  Admittedly it looks like gobbledygook.
But it also shows how cute you can get in Korn shell.

If I hadn't seen the expression my .profile would say

	case $- in
		*i*) export ENV=$Envfile ;;
		*) export ENV="" ;;
	esac

In fact it probably should anyway. :-)
-- 
"We walked on the moon --	((	Tom Neff
	you be polite"		 )) 	tneff@bfmny0.UU.NET