From: David Symonds Date: Mon, 29 Oct 2007 11:45:31 GMT Subject: Re: [PATCH 6/7] include $PATH in generating list of commands for "help -a" Message-ID: In-Reply-To: On 10/29/07, Johannes Schindelin wrote: > Hi, > > On Sun, 28 Oct 2007, Scott Parish wrote: > > > I was thinking set operations when i named this (hense "a" and "b"), > > but i'll try this out. > > Yes, I guessed that. But in that case, "subtract" is actively wrong, > since you cannot guarantee (and indeed do not want to assume) that one is > the subset of the other. The nearest set theory operation would be "difference" (or "complement"); that does not require that the subtrahend is a subset of the minuend. Dave.