[plt-scheme] likely 3.99.0.22 -> 3.99.0.23 incompatibility: hashtables

I always thought a relation was defined as a subset of the product of two 
(or even more) sets (not necessarily different ones, of course)
Jos

----- Original Message ----- 
From: "Graham Hughes" <graham at sigwinch.org>
To: <plt-scheme at list.cs.brown.edu>
Sent: Tuesday, April 08, 2008 12:14 AM
Subject: Re: [plt-scheme] likely 3.99.0.22 -> 3.99.0.23 incompatibility: 
hashtables


> Matthew Flatt wrote:
>> While we're cleaning up the language in v4, we'd like to do something
>> about the API for using hash tables:
>
> <snip description>
>
> I don't have any particular problem with this; I have had need for
> side-effect free tables before but used galore.plt from PLaneT instead.
> However if you don't want to use "table" the noun (which, again, I have
> no quarrel) one could use "map" (could be confusing) or "relation" (less
> confusing, more verbose, also subtly wrong, as relations are more like A
> -> P(B) than A -> B).
>
> Graham
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