I feel like the generic form here is Grouped Map Reduce. Something like:
Enum.group_map_reduce(list, group_key_fun, map_fun, initial_acc, reducer)
It could be used to do a single pass group_by/count for example:
Enum.group_map_reduce([1,1,2,3,5,5,8], &(&1), &(&1), 0, fn _, acc -> acc +
1 end)
That would produce:
%{1 => 2, 2 => 1, 3 => 1, 5 => 2, 8 => 1}
On Wed, Jun 22, 2016 at 1:56 PM Bartosz Kalinowski <[email protected]>
wrote:
> Oh thank you, I felt like this should be possible somehow using just the
> core. As you mentioned yourself there is still a permormance case
>
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