auto sum = aArr.map!`a.count`.reduce!((a,b) => a + b);
Rikki Thanks a lot. It works.
Function map!"a.count"(aArr) surprises me a little.
Because when I read std.algorithm reference: `Implements the
homonym function (also known as transform)`.
Which reminds me C++ transform and it will never used for
returning a element of the struct. I expect transform to modify
the elements of the range but in D it seem to me it also used
traversing the elements.
How can I imagine what "map" does in my mind, because it doesn't
matches with the transform concept in my mind?
Regards
Kadir Erdem
