Xcode中调试代码时,常常需要使用console窗口查看变量的信息,比如使用了如下的命令来输出有关UITableView中一个UITableViewCell的信息, po cell 令人感到意外的是,console窗口得到的输出是: error: Couldn't materialize struct: the variable 'cell' has no location, it may have been optimized out 从这样的输出看到了“it may have been o
使用spark-submit提交local任务时,会输出很多Info信息: ------------------------------------------- Time: ms ------------------------------------------- // :: INFO scheduler.JobScheduler: Finished job streaming job ms. ms // :: INFO scheduler.JobScheduler: Total delay
创建如下三个类:(People类中的三个方法分别输出一些信息,ChinaPeople 和AmericanPeople类重写父类的三个方法). ackage com.chuoji.text01; public class People { protected double height; protected double weight; public double getHeight() { return height; } public void setHeight(double height)
