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HLEN

Syntax​

HLEN key

Time complexity: O(1)

ACL categories: @read, @hash, @fast

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​

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