Happy Happy Joy Joy (was: On to Hydro)

[Tyler Close]

Markm wrote:
> At 01:32 PM 8/21/00 , Tyler Close wrote:
> >? define m := RedBlackTree new(LesserDouble INSTANCE) asSet
> ># value: [  ]
> >
> >? define NaN := 0.0 / 0.0
> ># value: NaN
> >
> >? m := m with(NaN)
> ># value: [ NaN ]
>
> Since RedBlackTrees are supposed to only hold fully ordered
> sets, I propose
> that this operation should be an error.  I hereby define ;)
> a singleton set
> of an irreflexive element to be a non fully ordered set.

My RedBlackTree doesn't allow a second NaN to be inserted, but
wouldn't a Xanadu container allow it? In this case, the weird "I'm in
there, but you can't find me." behaviour would still be present. I
don't think you can define it away.

Tyler


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