Wouldn't hashCode be called every time you use an infinite sequence as
a key in a hash map?

That strikes me as a problem, since everything else in Clojure makes
perfectly good map keys.


On Oct 29, 4:01 am, Mark Engelberg <mark.engelb...@gmail.com> wrote:
> On Wed, Oct 28, 2009 at 11:08 PM, John Harrop <jharrop...@gmail.com> wrote:
> > For the specific case of hashCode, no; identical values must have identical
> > hashes but different values need not have different hashes. Collisions due
> > to the hypothetical cutoff get exponentially less likely with each
> > additional increment of 1 of the cutoff length.
>
> I see your point that hashCode could be made to work on infinite
> sequences, but since hashing is almost always a prelude to testing for
> equality, I'm hard pressed to think of an example of why you'd want to
> be able to do this.  Can you illustrate with an example?
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