[plt-scheme] Is there a set data-type?

From: David Herman (dherman at ccs.neu.edu)
Date: Sat Feb 6 13:15:22 EST 2010

I think you might want this:


No need for data abstraction, no need to flirt with computability theory or meta-mathematics. It's just a data structure. ;)


On Feb 5, 2010, at 5:12 PM, Todd O'Bryan wrote:

> I feel like I started a tempest in a teapot.
> I really just needed to check that an operation passed into a function
> (as a symbol) was one of the permitted operations. Roughly 10 members,
> but I didn't want to read through the list of all the operations each
> time I had to check. Thus, the question about (in my mind, finite)
> sets and my presumption that a hashtable would be a good
> representation.
> Sorry for not asking a more specific question and encouraging all this
> discussion about much more esoteric topics than I had intended to. :-)
> Todd
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