From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <34feff09e0eb478d71030dd09fcd8135@terzarima.net> To: 9fans@cse.psu.edu Subject: Re: [9fans] ls, rc question From: Charles Forsyth In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Fri, 19 Mar 2004 09:07:12 +0000 Topicbox-Message-UUID: 3840bf9c-eacd-11e9-9e20-41e7f4b1d025 >>The thing is, reads from a union directory do in fact give you the union. i think the argument is provoked by the assumption that it's a union of sets, preventing duplicates, but the system happens to work with bags, not sets, where union can (must) allow duplicates. i'd agree it's sometimes annoying but it's both explicable and understandable, and (i'd say) not theoretically indefensible. at a practical level, making the duplicates visible happens to make it easy to illustrate (bind a directory to itself: look, everything in it is duplicated).