Kinds of containers

[Nordlöw via Digitalmars-d]

On Wednesday, 21 October 2015 at 11:05:12 UTC, Andrei 
Alexandrescu wrote:
> Internally, functional containers take advantage of common 
> substructure and immutability to share actual data. The classic 
> resource for defining and implementing functional containers is 
> http://www.amazon.com/Purely-Functional-Structures-Chris-Okasaki/dp/0521663504.

Online at: https://www.cs.cmu.edu/~rwh/theses/okasaki.pdf