HaskellMN Monthly Meetup

Andrew Clarkson recommended reading about and discussing persistent / immutable / purely-functional data structures. This blog post about Clojure's Vectors will be a good place to frame our discussion: http://hypirion.com/musings/understanding-persistent-vector-pt-1

Other readings, if you're interested in more:

This Wikipedia page has examples of some other data structures: https://en.wikipedia.org/wiki/Persistent_data_structure

And of course, there is Chris Okasaki's Thesis: https://www.cs.cmu.edu/~rwh/theses/okasaki.pdf