[Haskell-cafe] Byte Histogram

[Daniel Fischer]

To illustrate your prediction about the side-issues:

On Thursday 03 February 2011 22:10:51, Andrew Coppin wrote:
> Consider for a moment the original implementation with Data.Map. Adding
> a seq or two here will do no good at all; seq reduces to WHNF. What we
> are wanting is NF, and I can see no way at all of doing that.

Check out Data.Map.insertWith'