union

Author: chzhoo

src/server.h

@@ -1430,7 +1430,7 @@ typedef struct zskiplistNode {
     };
     union {
         struct zskiplistNode *backward; /* Pointer to previous node for reverse traversal */
-        struct zskiplistNode *tail;     /* ail element of the skiplist*/
+        struct zskiplistNode *tail;     /* Tail element of the skiplist */
     };
     struct zskiplistLevel {
         struct zskiplistNode *forward;
@@ -1440,10 +1440,10 @@ typedef struct zskiplistNode {
          * So we use it in order to hold the height of the node, which is the number of levels. */
         unsigned long span;
     } level[];
-    /* After the level[], sds header length (1 byte) and an embedded sds element are stored. */
+    /* For non-header nodes, after the level[], sds header length (1 byte) and an embedded sds element are stored. */
 } zskiplistNode;
 
-/* Actually zskiplist is an alias for zskiplistNode, pointing to head node. */
+/* Actually zskiplist is an alias for zskiplistNode, pointing to header node. */
 typedef struct zskiplistNode zskiplist;
 
 typedef struct zset {