From: Neil Smith <neil.git@njae.me.uk>
Date: Fri, 16 Dec 2016 08:55:19 +0000 (+0000)
Subject: Using lazy lists works eventually
X-Git-Url: https://git.njae.me.uk/?p=advent-of-code-16.git;a=commitdiff_plain;h=def5eb181275889c4f50ea8411dff81bd565efb2

Using lazy lists works eventually
---

diff --git a/advent15l.hs b/advent15l.hs
index e3c97fb..f04ab9c 100644
--- a/advent15l.hs
+++ b/advent15l.hs
@@ -12,8 +12,8 @@ part1 :: [[Int]] -> IO ()
 part1 disks = print $ head $ filter (canFall disks) [0..]
 
 part2 :: [[Int]] -> IO ()
-part2 disks = print $ head $ filter (canFall disks2) [0..5000000]
-    where disks2 = id $! map (take 5000000) $ disks ++ [drop 7 $ drop 0 $ cycle [0..(11-1)]]
+part2 disks = print $ head $ filter (canFall disks2) [0..]
+    where disks2 = disks ++ [drop 7 $ drop 0 $ cycle [0..(11-1)]]
 
 canFall :: [[Int]] -> Int -> Bool
 canFall ds i = all (\d -> (d!!i) == 0) ds