Jon Fairbairn
If we don't give it a name, learning to read “concat . intersperse something” (which is more common than the formulation I gave above) means learning intersperse, concat and compose -- all of which are invaluable Haskell. But if we call it whateverify, there will still be programmes around that use concat with intersperse [...]
I agree. I've always been slightly annoyed at the presence of 'concatMap' since its replacement is so trivial. Another reason for a special function could be efficiency. You could possibly have the case that intersperse (or map) construct new strings that only get copied and discarded by the subsequent concat. (A sufficiently smart compiler will probably be able to optimize this away, though) -k -- If I haven't seen further, it is by standing in the footprints of giants