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On Mon, Jul 28, 2003 at 11:23:42AM -0700, Jim White wrote: > I have a second thought that addresses my concerns: > > collection-fold[-keys]-left and collection-fold[-keys]-right are not > specified with regard to the order of enumeration. For unordered > collections, collection-fold-right the implementation may either raise > an error or provide an enumeration in reverse order or collection-fold-left. In other words, collection-fold-right is undefined on unordered collections. > > collection-fold[-keys]-increasing and collection-fold[-keys]-decreasing > are specified to be an ordered enumeration and are only defined for > ordered collections. I like this proposal, but how does it address your enumeration stability concerns? Scott
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