Purely Functional Data Structures[1] by Chris Okasaki is worth reading. There's a book version if you prefer vs reading a thesis. Even though the domain applic

Purely Functional Data Structures[1] by Chris Okasaki is worth reading. There's a book version if you prefer vs reading a thesis. Even though the domain application is functional programming, these datastructures can come in handy when you want to enable state sharing / keeping old versions around without having to copy data. [1] https://www.cs.cmu.edu/~rwh/students/okasaki.pdf https://www.cs.cmu.edu/~rwh/students/okasaki.pdf