Kinds of containers

[Andrea Fontana via Digitalmars-d]

On Wednesday, 21 October 2015 at 11:05:12 UTC, Andrei 
Alexandrescu wrote:
> I'll attempt to implement a few versions of each and see what 
> they look like. The question here is what containers are of 
> interest for D's standard library.
>
>
> Andrei

Tree (binary, quad, octo, r/b, etc...), graph (directed, 
undirected, sparse, weighted, etc...) have my votes. They enable 
a lot of algorithms to be implemented.