2019-08-27

Author: JiayangWu

0251.展开二维向量/0251-展开二维向量.py

@@ -5,23 +5,25 @@ def __init__(self, v):
         :type v: List[List[int]]
         """
         self.list = []
-        for item in v:
-            for num in item:
-                self.list.append(num)
+        for nums in v:
+            for item in nums:
+                self.list.append(item)
         self.index = 0
-        
+
     def next(self):
         """
         :rtype: int
         """
         self.index += 1
-        return self.list[self.index - 1]
+        return self.list[self.index - 1] 
+        
+        
 
     def hasNext(self):
         """
         :rtype: bool
         """
-        return self.index < len(self.list)
+        return self.index != len(self.list)
 
 
 # Your Vector2D object will be instantiated and called as such: