Commit aae4a0f

mo <mokha@cisco.com>
2017-08-05 16:45:17
print if there is a tree.
master
1 parent bfe18a5
Changed files (1)
spec
binary_trees
is_tree_symetric_spec.rb
spec/binary_trees/is_tree_symetric_spec.rb
@@ -143,7 +143,7 @@ DOC
 
 DOC
   def symmetric?(tree)
-    tree.print
+    tree&.print
     level, visited, queue, values_in_level = 0, 0, [{ node: tree, level: 0 }], []
 
     until queue.empty?