ekmett/reducers — pull request #3 by w3rs (2011-12-02 19:56:02+00:00)
Title: Changes in Reducer module

Renamed some Reducer functions to mapReduce style and enhanced their implementation (subject to discussion, since I haven't tested the performance). Thus, with Reducer + Data.Foldable imports we don't need Generator to do efficient mapReduce.

Added mapReduce-like functions working with Maybe values, generalising methods from Data.Maybe.

Also, see the comment to commit.