From: jim
Date: Mon, 6 Apr 2015 22:30:37 +0000 (0400)
Subject: remove toc
XGitUrl: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff_plain;h=2ba0d2e3db9e8754bc533b73e5012e09399560fc
remove toc

diff git a/topics/_week9_transformers.mdwn b/topics/_week9_transformers.mdwn
index 95963a76..414cbb95 100644
 a/topics/_week9_transformers.mdwn
+++ b/topics/_week9_transformers.mdwn
@@ 1,5 +1,3 @@
[[!toc]]

So far, we've defined monads as singlelayered boxes. In practice, one often wants to combine the abilities of several monads. Corresponding to each monad like Reader, there's a corresponding ReaderT **monad transformer**. That takes an existing monad M and wraps Readerish monad packaging around it. The way these are defined parallels the way the singlelayer versions are defined. For example, here's the Reader monad:
(* monadic operations for the Reader monad *)