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iOS Storyboard unwind segues使用

unwind(回退)表示在storyboard中后退 场景:点击view1的btn1跳到view2,然后点击view2的btn2退回view1 首先在view1controller文件中添加 @IBAction func exitToHere(_ sender: UIStoryboardSegue) { // No code needed! } 在view2的Exit上右 ...

mysql5.7.17高可用复制MySQL Group Replication

http://blog.csdn.net/d6619309/article/details/53691352 京东MySQL Group Replication官方文档中文版pdf

数据库隔离级别

http://blog.csdn.net/hzw05103020/article/details/51288992 http://blog.sina.com.cn/s/blog_499740cb0100ugs7.html

mac下打出特殊符号

option+shift+b

前端在线调试工具

codepenjsfiddle

MySQL高可用架构之MHA

http://www.cnblogs.com/gomysql/p/3675429.html

CocoaPods :iOS项目中第三方开源库的管理工具

http://www.code4app.com/article/cocoapods-install-usagehttps://my.oschina.net/w11h22j33/blog/206129淘宝的 ruby 源已经不维护了,已替换成 Ruby China#更新gemsudo gem update --system#安装sudo gem install cocoapodspod setup1、创建Podfi ...

php出现var_export does not handle circular references

file_put_contents('888.txt', var_export($test,true)); //将var_export更换为print_r file_put_contents('888.txt', print_r($test,true));

从mysql数据表中随机取出一条记录

效率极差的一种办法:select * from table order by rand() limit 1;高效写法SELECT * FROM table WHERE id >= ((SELECT MAX(id) FROM table )-(SELECT MIN(id) FROM table )) * RAND() + (SELECT MIN(id) FROM table ) LIMIT 1

产品背后:你产品的记忆点在哪里?

http://www.woshipm.com/pmd/791240.html