Walter Bright:
The trivial ones should not be added to Phobos,
The situation is not that simple. Just a general (not specific)
note on this topic: Haskell has a standard module named "Prelude"
that is usually loaded automatically at the start. It contains
several commonly useful functions, types and constants:
http://www.haskell.org/onlinereport/standard-prelude.html
You can think of lot of the stuff you see in the Prelude as
"trivial", like concatMap, that is just one line of very simple
code (plus a first optional line that gives its type):
concatMap :: (a -> [b]) -> [a] -> [b]
concatMap f = concat . map f
Yet I think most Haskell programmers think it's a good idea to
keep that stuff there. concatMap becomes a "chunk" so it reduces
the thinking load of the programmer. And in some libraries there
are "alternative" versions of concatMap that work on different
types, like "packed" vectorized sequences, that are faster, but
with the the same usage for the programmer.
Bye,
bearophile
