Update hash map

codes/cpp/chapter_hashing/array_hash_map.cpp

@@ -53,7 +53,7 @@ public:
     /* 删除操作 */
     void remove(int key) {
         int index = hashFunc(key);
-        // 置为空字符，代表删除
+        // 置为 nullptr ，代表删除
         bucket[index] = nullptr;
     }
 
@@ -97,6 +97,8 @@ public:
         }
     }
 };
+
+/* Driver Code */
 int main() {
     /* 初始化哈希表 */
     ArrayHashMap map = ArrayHashMap();

codes/cpp/chapter_hashing/hash_map.cpp

@@ -7,6 +7,7 @@
 #include "../include/include.hpp"
 
 
+/* Driver Code */
 int main() {
     /* 初始化哈希表 */
     unordered_map<int, string> map;

codes/go/chapter_hashing/array_hash_map.go

@@ -49,7 +49,7 @@ func (a *ArrayHashMap) put(key int, val string) {
 /* 删除操作 */
 func (a *ArrayHashMap) remove(key int) {
 	index := a.hashFunc(key)
-	// 置为空字符，代表删除
+	// 置为 nil ，代表删除
 	a.bucket[index] = nil
 }
 

codes/go/chapter_hashing/array_hash_map_test.go

@@ -50,4 +50,3 @@ func TestArrayHashMap(t *testing.T) {
 		fmt.Println(val)
 	}
 }
-

codes/python/chapter_hashing/array_hash_map.py

@@ -73,6 +73,7 @@ class ArrayHashMap:
                 print(pair.key, "->", pair.val)
 
 
+""" Driver Code """
 if __name__ == "__main__":
     """ 初始化哈希表 """
     mapp = ArrayHashMap()

codes/python/chapter_hashing/hash_map.py

@@ -8,6 +8,8 @@ import sys, os.path as osp
 sys.path.append(osp.dirname(osp.dirname(osp.abspath(__file__))))
 from include import *
 
+
+""" Driver Code """
 if __name__ == "__main__":
     """ 初始化哈希表 """
     mapp = {}