贼简单的代码示例 for [i,j] in [range(3),range(3)]:print(i,j) 输出: ValueError: too many values to unpack (expected 2) 正确示例 for i,j in zip(range(3),range(3)):print(i,j) 输出: 0 0 1 1 2 2 原因:后面zip()包装了两个lis
Host '10.10.120.174' is blocked beacuse of many connection errors;unblock with 'mysqldamin flush-hosts' #使用清楚缓存的方法,这样就会把计数清理掉,进入mysql控制台,执行:flush hosts; /usr/bin/mysqladmin -u jiaobo -puukkgg flus
How many ways Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3007 Accepted Submission(s): 1759 Problem Description 这是一个简单的生存游戏,你控
找规律题,最终可以简化为一个式子 How Many Points of Intersection? We have two rows. There are a dots on the top row and b dots on the bottom row. We draw line segments connecting every dot on the top ro
题目描述 Today is Ignatius' birthday. He invites a lot of friends. Now it's dinner time. Ignatius wants to know how many tables he needs at least. You have to notice that not all the friends know ea
http://acm.hdu.edu.cn/showproblem.php?pid=1978 How many waysTime Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3022 Accepted Submission(s):
问题 在测试并发的时候,当达到了一定值的时候,日志会显示错误: ConnectionError: Error 24 connecting CACHEREDIS-HOST:6379. Too many open files. 解决办法 查看redis的maxclients. CONFIG GET maxclients //查看同一时间最大客户端连接数 Redis的连接还受到本身系统的
How many ways Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3663 Accepted Submission(s): 2135 Problem Description 这是一个简单的生存游戏
背景 在一次Linux系统中配置Java服务运行过程中,程序不能正常启动,报错(Too many open files) 解决方法 修改服务的LimitNOFILE配置 vim /usr/lib/systemd/system/xxx.service [Service] LimitNOFILE=65535 重启xxx服务,解决问题 systemctl restart xxx