Discussion on groupBy

[Peter Alexander via Digitalmars-d]

On Saturday, 10 January 2015 at 20:19:14 UTC, Andrei Alexandrescu 
wrote:
> groupBy is an important primitive for relational algebra 
> queries on data. Soon to follow are operators such as 
> aggregate() which is a sort of reduce() but operating on ranges 
> of ranges.

GroupBy is a very important range. It's one the first one ranges 
I wrote when starting to write D code (being unsatisfied with the 
existing "group" offering).

I agree with separating out the non-equivalence relation groupBy. 
Having both under the same name just confuses matters and makes 
for complex implementations.