daily

daily

我的日志

mysql union all
http://dev.mysql.com/doc/refman/5.7/en/union.html

explain 
select * from filelost where imei_crypt like "%32878681013683905766109117506828893802%"
union all
select * from filelost_1611 where imei_crypt like "%32878681013683905766109117506828893802%"
union all
select * from filelost_1612 where imei_crypt like "%32878681013683905766109117506828893802%"
union all
select * from filelost_1701 where imei_crypt like "%32878681013683905766109117506828893802%"

/*
select * from filelost_old where imei_crypt like "%32878681013683905766109117506828893802%"
*/

android中当崩溃引发二次崩溃是：调用uncaughtException时，我们在调用系统默认的sDefaultHandler.uncaughtException(thread, ex)来处理时，并不会弹窗提示崩溃，而是直接闪退。

AtomicBoolean.getAndSet(newValue) //返回原来旧的值，并设置新的值
AtomicBoolean.compareAndSet(expect,update) //只有返回为true时才会更新值为update,只有expect等于原来的值才会返回true

酷狗中，对音频文件计算hash的代码实现。

PreCalcHashValueRunnable.run

潮汕地区，是广东省汕头市、潮州市、揭阳市三个地级市的统称