Returns the number of fields contained in the hash stored at key.
@return
@integer-reply: number of fields in the hash, or 0 when key does not exist.
@examples
HSET myhash field1 "Hello"
HSET myhash field2 "World"
HLEN myhashReturns the number of fields contained in the hash stored at key.
@return
@integer-reply: number of fields in the hash, or 0 when key does not exist.
@examples
HSET myhash field1 "Hello"
HSET myhash field2 "World"
HLEN myhash