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Date:	Wed, 4 Nov 1992 09:25:33 -0500
From:	malte@techfak.uni-bielefeld.de
Message-Id: <9211041425.AA18713@dahlie.techfak.uni-bielefeld.de>
To:	rc@hawkwind.utcs.toronto.edu
Subject: Re: set subtract
In-Reply-To: Mail from 'rsalz@osf.org'
      dated: 	Wed, 4 Nov 1992 09:12:36 -0500


	Easy; the following just uses built-ins.  Note that it implements
	the example (first arg is a pattern, not a list of patterns); I don't
	believe the synopsis can be done.
	fn index { pat=() i=() result=() count=() {
	    pat=$1
	    shift || { echo 'Usage error' >[1=2] ; return 1 }
	    for (i) {
	        count=(a $count)
	        eval ~ $i $pat && result=($result $#count)
	    }
	    echo $result
	} }

Fine, this is similar to what I do now. Why a built in command ?
Imagine $pat has a value of '$something'. This will break it.

Malte