redis LSET command
Translation results：
set
英[set] 美[sɛt]
vt. Set; place, arrange; put in a certain situation; place tableware
vi. Setting off; setting off; condensation
n.Gathering; a set; a set; a TV set
adj. Fixed; located in...; stubborn; arranged The
third person singular: sets plural: sets present participle: setting past tense: set past participle: set
redis LSET commandsyntax
Function: Set the value of the element whose subscript is index in the list key to value.
Syntax: LSET key index value
Description: When the index parameter is out of range, or LSET is performed on an empty list (key does not exist) , an error is returned.
Available versions: >= 1.0.0
Time complexity: Perform LSET operation on the head element or tail element, the complexity is O (1). In other cases, it is O(N), where N is the length of the list.
Return: Return ok if the operation is successful, otherwise an error message will be returned.
redis LSET commandexample
# 对空列表(key 不存在)进行 LSET redis> EXISTS list (integer) 0 redis> LSET list 0 item (error) ERR no such key # 对非空列表进行 LSET redis> LPUSH job "cook food" (integer) 1 redis> LRANGE job 0 0 1) "cook food" redis> LSET job 0 "play game" OK redis> LRANGE job 0 0 1) "play game" # index 超出范围 redis> LLEN list # 列表长度为 1 (integer) 1 redis> LSET list 3 'out of range' (error) ERR index out of range