From e285e81c2519dfe9b000d0f297b72c6c9909662d Mon Sep 17 00:00:00 2001
From: Joe Zhao <ztuowen@gmail.com>
Date: Fri, 8 Aug 2014 14:37:06 +0800
Subject: Last few chapters in LYHGG

---
 powerset.hs | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 powerset.hs

(limited to 'powerset.hs')

diff --git a/powerset.hs b/powerset.hs
new file mode 100644
index 0000000..39d53ab
--- /dev/null
+++ b/powerset.hs
@@ -0,0 +1,4 @@
+import Control.Monad
+
+powerset :: [a] -> [[a]]
+powerset xs = filterM (\x -> [True,False]) xs
-- 
cgit v1.2.3-70-g09d2