From 94a588fd25a9a93fd7e8bd5f770f1dfbf5f4e108 Mon Sep 17 00:00:00 2001 From: Jim Pryor Date: Sat, 4 Dec 2010 15:07:16 -0500 Subject: [PATCH] add link to Haskell wikibook/zippers Signed-off-by: Jim Pryor --- tree_and_list_zippers.mdwn | 1 + 1 file changed, 1 insertion(+) diff --git a/tree_and_list_zippers.mdwn b/tree_and_list_zippers.mdwn index ee627a7e..1eb5d077 100644 --- a/tree_and_list_zippers.mdwn +++ b/tree_and_list_zippers.mdwn @@ -247,6 +247,7 @@ where the targetted element is the root of our base tree. Like the "moving backw We haven't given you a real implementation of the tree zipper, but only a suggestive notation. We have however told you enough that you should be able to implement it yourself. Or if you're lazy, you can read: * [[!wikipedia Zipper (data structure)]] +* [Haskell wikibook on zippers](http://en.wikibooks.org/wiki/Haskell/Zippers) * Huet, Gerard. ["Functional Pearl: The Zipper"](http://www.st.cs.uni-sb.de/edu/seminare/2005/advanced-fp/docs/huet-zipper.pdf) Journal of Functional Programming 7 (5): 549-554, September 1997. * As always, [Oleg](http://okmij.org/ftp/continuations/Continuations.html#zipper) takes this a few steps deeper. -- 2.11.0