get
英[get] 美[ɡ?t]
vt. Get; catch; persuade; receive (punishment, etc.)
vt.& vi. Arrive, come
vi. Become; start; try to deal with; obtain benefits or wealth
n. Reproduce, cub; profit
Third person singular : gets present participle: getting past tense: got past participle: got gotten
redis HMGET command syntax
Function: Return the value of one or more given fields in the hash table key.
Syntax: HMGET key field [field ...]
Description: If the given field does not exist in the hash table, then Returns a nil value. Because a non-existent key is treated as an empty hash table, a HMGET operation on a non-existent key will return a table with only nil values.
Available versions: >= 2.0.0
Time complexity: O(N), N is the number of given domains.
Returns: A table containing associated values ??for multiple given fields. The table values ??are arranged in the same order as the request order for the given field parameters.
redis HMGET command example
redis> HMSET pet dog "doudou" cat "nounou" # 一次設置多個域 OK redis> HMGET pet dog cat fake_pet # 返回值的順序和傳入參數的順序一樣 1) "doudou" 2) "nounou" 3) (nil) # 不存在的域返回nil值