Add prev to Node class (#82)

For managing an LRU cache, we need to use a doubly linked list for move_to_front() operation.
2017-06-06 01:25:04 +01:00 · 2017-06-06 01:25:04 +01:00 · 17e5fb7d32
parent 4badddd78e
commit 17e5fb7d32
1 changed files with 2 additions and 1 deletions
--- a/solutions/object_oriented_design/lru_cache/lru_cache.ipynb
+++ b/solutions/object_oriented_design/lru_cache/lru_cache.ipynb
@ -56,7 +56,8 @@
    "\n",
    "    def __init__(self, results):\n",
    "        self.results = results\n",
-    "        self.next = next\n",
+    "        self.prev = None\n",
+    "        self.next = None\n",
    "\n",
    "\n",
    "class LinkedList(object):\n",