Returns the number of fields in a hash.
HLEN
key
Returns the number of fields contained in the hash stored at
key
.
Integer reply: the number of fields in the hash, or 0 when the key does not exist.
Integer reply: the number of the fields in the hash, or 0 when the key does not exist.
O(1)
@fast @hash @read
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
HDEL, HEXISTS, HGET, HGETALL, HINCRBY, HINCRBYFLOAT, HKEYS, HMGET, HRANDFIELD, HSCAN, HSET, HSETNX, HSTRLEN, HVALS.