update refunct zippers code

[lambda.git] / index.mdwn

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@@ -185,6 +185,15 @@ We've posted a [[State Monad Tutorial]].
 
 > Topics: We will be discussing the reading posted above. Here are [[notes and links to code|/topics/week10_gsv]].
 
+(**Week 11**) Thursday April 16
+
+> We postponed class this week to enable people to attend the Partee talk.
+
+(**Week 12**) Thursday April 23
+
+> Topics: Mutation and hyper-synonymy (no notes); [[Abortable list traversals|/topics/week12_abortable_traversals]]; [[List and tree zippers|/topics/week12_list_and_tree_zippers]]; [[Homework|exercises/assignment12]]
+
+> For amusement/tangential edification: [xkcd on code quality](https://xkcd.com/1513/); [turning a sphere inside out](https://www.youtube.com/watch?v=-6g3ZcmjJ7k)
 
 
 ## Course Overview ##