- Usage:
-
HLEN key
- Complexity:
- O(1)
- Since:
- 2.0.0
Returns the number of fields contained in the hash stored at key.
Examples
127.0.0.1:6379> HSET myhash field1 "Hello"
(integer) 1
127.0.0.1:6379> HSET myhash field2 "World"
(integer) 1
127.0.0.1:6379> HLEN myhash
(integer) 2
RESP2 Reply
Integer reply: the number of fields in the hash, or 0 when the key does not exist.
RESP3 Reply
Integer reply: the number of the fields in the hash, or 0 when the key does not exist.