Redis

HLEN key

Returns the number of fields contained in the hash stored at key.

Return value

Integer reply: number of fields in the hash, or 0 when key does not exist.

Examples

redis>  HSET myhash field1 "Hello"
(integer) 1
redis>  HSET myhash field2 "World"
(integer) 1
redis>  HLEN myhash
(integer) 2
redis> 
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