You are given an array a[0…n−1] of n integers. This array is called a “valley” if there exists exactly one subarray a[l…r] such that:
0≤l≤r≤n−1, alal1al2⋯ar, l0 or al−1>al, rn−1 or ar<ar1. Here are three examples:
The first image shows…
Redis的分布式锁问题(九)Redis Lua 脚本实现分布式锁
上集回顾
Lua的简单介绍
redis调用函数
set name jack
set name Rose,再执行get name
redis的 EVAL 命令
Lua脚本解决unLock业务流程
代码实现
unLock.lua
RedisTemp…