[plt-scheme] efficient set implementation

[Sam Tobin-Hochstadt]

On Mon, 2006-09-04 at 08:46 -0600, Chongkai Zhu wrote:
> Hi all,
> 
> Is there any existing efficient set implementation (like RedBlackSet) in Scheme, PLT in particular?

See galore.plt in PLaneT.  

http://planet.plt-scheme.org/#galore.plt

sam th