hlen
1. 基本語法
hlen(hkey
, callback
)
hkey
, callback
) 回傳hkey
對應的欄位(Sub-Key)數量。
const dict = {
name: 'Lester Burnham',
gender: 'M',
age: '42',
hobby : 'Workout'
};
client.hmset('user:3', dict);
client.hlen('user:3', redis.print);
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