On Wednesday, 13 January 2021 at 12:06:05 UTC, Roguish wrote: > > which seems perfectly adequate. > > What about sets? You can also search https://code.dlang.org I use: https://code.dlang.org/packages/emsi_containers Which has hashset: https://github.com/dlang-community/containers/blob/fc1625a5a0c253272b80addfb4107928495fd647/src/containers/hashset.d