Racket now has all manner of purely functional data structures (Okasaki and Bagwell) available as a library on Planet: http://planet.plt-scheme.org/package-sou

Racket now has all manner of purely functional data structures (Okasaki and Bagwell) available as a library on Planet: http://planet.plt-scheme.org/package-source/krhari/pfds.plt/1/5/planet-docs/functional-data-structures/index.html http://planet.plt-scheme.org/package-source/krhari/pfds.plt/...