Robert Jacques wrote:
I'd recommend rolling that into a basic statistics struct containing common single pass metrics: i.e. sum, mean, variance, min, max, etc.
Well the problem is that if you want to compute several one-pass statistics in one pass, you'd have to invent means to combine these functions. That ability is already present in reduce, e.g. reduce(min, max)(range) yields a pair containing the min and the max element after exactly one pass through range.
Andrei
