A couple minor fixes.

nowist · Apr 6, 2017 · 714cf54 · 714cf54
1 parent 77b2bb7
commit 714cf54
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Showing 2 changed files with 6 additions and 7 deletions.
diff --git a/ch-07-object-oriented-design/01-deck-of-cards.py b/ch-07-object-oriented-design/01-deck-of-cards.py
@@ -9,7 +9,7 @@ def __init__(self, cards):
 
   def shuffle(self):
     for i in xrange(len(self.cards)):
-      o = random.randint(len(self.cards))
+      o = random.randint(i)
       self.cards[i], self.cards[o] = self.cards[o], self.cards[i]
 
   def draw_card(self):

diff --git a/ch-08-recursion-and-dynamic-programming/01-triple-step.py b/ch-08-recursion-and-dynamic-programming/01-triple-step.py
@@ -1,15 +1,14 @@
 # Give the number of ways to climb n steps 1, 2, or 3 steps at a time.
 
 def triple_step(n):
-  counts = [1, 1, 2, 4]
-  if n < 4:
+  counts = [1, 1, 2]
+  if n < 3:
     return counts[n]
-  i = 3
+  i = 2
   while i < n:
     i += 1
-    counts[i % 4] = 0
-    counts[i % 4] = sum(counts)
-  return counts[i % 4]
+    counts[i % 3] = sum(counts)
+  return counts[i % 3]
 
 import unittest