On Sunday, 2 September 2012 at 16:44:40 UTC, Andrei Alexandrescu wrote: > On 9/2/12 6:44 PM, Andrei Alexandrescu wrote: > [snip] > > The remaining question is where to put among and between. > std.functional? > > Andrei Without second thought, I'd say std.container.set for the first, std.functional for the second (not too sure about it).