HSTRLEN

Syntax
HSTRLEN key field
Available since:
3.2.0
Time complexity:
O(1)
ACL categories:
@read, @hash, @fast,

返回存储在key中的哈希表中与field关联的值的字符串长度。如果key或field不存在，则返回0。

示例

HSET myhash f1 HelloWorld f2 99 f3 -256 HSTRLEN myhash f1 HSTRLEN myhash f2 HSTRLEN myhash f3

RESP2/RESP3 回复

Integer reply: the string length of the value associated with the field, or zero when the field isn't present in the hash or the key doesn't exist at all.
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