Problem A: The Monocycle A monocycle is a cycle that runs on one wheel and the one we will be considering is a bit more special. It has a solid wheel colored with five different colors as shown in the figure: The colored segments make equal angles (…
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>记录鼠标的点击次数</title>&…
对于用Context.startService()启动的service生命周期为onCreate()-onStartCommand()-onDestroy();如果多次用context.startService启动service只会多次执行onStartCommand()方法.根据音乐播放器的特性使用Context.startService()调用在合适不过了. public class MyMusicPlayer extends Service implements MediaPlayer.O…
# source demo-openrc.sh # ssh-keygenGenerating public/private rsa key pair.Enter file in which to save the key (/root/.ssh/id_rsa):Enter passphrase (empty for no passphrase):Enter same passphrase again:Your identification has been saved in /root/.ssh…
Entity Framework在使用时,很多时间操纵的是Model,并没有写sql语句,有时候为了调试或优化等,又需要追踪Entity framework自动生成的sql(最好还能记录起来,方便出错时排查) 方式一: 通过System.Data.Entity.DataBase.Log属性指定一个无返回值的委托,来实现记录日志的功能 public partial class EFContext<T> : DbContext where T : class { public EFContext(…