On Mon, Dec 6, 2010 at 1:05 PM, Stuart Sierra <the.stuart.sie...@gmail.com> wrote: > On Dec 6, 8:36 am, Ken Wesson <kwess...@gmail.com> wrote: >> Furthermore, the comment (not made by Hickey) that map order "may be >> unstable" is more than a little puzzling in light of the fact that the >> maps in question are immutable. :) > > In general, Rich has been careful not to promise things that might > limit changes he can make in the future. Sets and maps are unordered. > `seq` happens to be deterministic on ArrayMap and HashMap, but there > might some day be some other kind of map or set for which `seq` cannot > be deterministic. Therefore, Clojure does not promise anything about > `seq` on maps, other than that it will return the key-value pairs.
I confess I can't see any obvious reason ever to make seq nondeterministic on an immutable data structure. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
