Issue 20

It’s not dead, it’s resting! I am pleased to announce that Issue 20 of the Monad Reader is now available.

Issue 20 consists of the following three articles:

• Enumeration of Tuples with Hyperplanes by Tillmann Vogt
• Understanding Basic Haskell Error Messages by Jan Stolarek
• The MapReduce type of a Monad by Julian Porter

Feel free to browse the source files. You can check out the entire repository using Git:

git clone https://github.com/ezyang/tmr-issue20.git

If you’d like to write something for Issue 21, please get in touch!