编程

Show just small icon in status bar without showing notification

I want to show constantly small icon in the status bar , without show the notification itself on the notification tray of the system. I tried using custom layout and set the visibility of the root element to View.GONE , or View.INVISIBLE , but for both, the system ignores it. I also tried to set the...

分布式锁--redis(集群)

原文链接:https://blog.csdn.net/weixin_38003389/article/details/89434629 redis 集群做分布式锁,我们使用 Redisson。 框架 版本 Spring Boot 2.0.3.RELEASE Spring Cloud Finchley.RELEASE redis redis-4.0.11 JDK 1.8.x maven配置 <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId>...

Java学习笔记八--异常(二)

Java听课记录十一 自制异常 需要继承java.lang.RuntimeException; 需要生成构造方法 序列化,将对象变为字节或其他序列,反序列化将其重新变化为对象 e.printStackTrace(); // 输出异常堆栈信息 e.getMessage() // 输出的是括号中的信息,例如提示信息 public class DIYexception extends RuntimException{ // 此处需要添加构造方法 //需要添加序列号表示 } 需要自定义异常的原因,java中有不同的异常类,分别表示某一种具体的异常情况,在开发过程中,总有一些异常没有定义...

What is a good heuristic to detect if a column in a pandas.DataFrame is categorical?

I've been developing a tool that automatically preprocesses data in pandas.DataFrame format. During this preprocessing step, I want to treat continuous and categorical data differently. In particular, I want to be able to apply, e.g., a OneHotEncoder to only the categorical data. Now, let's assume...

What is the difference between “Legacy Version” and “Stable Version”?

I am using JQuery Mobile and there are two available versions: A stable version and a legacy version. I am not familiar with the latter one. What is a legacy version? or what is the difference with the stable version? Which one is recommended to use in a production site? Many thanks A legacy version...

Find count of files matching a pattern in a directory in linux

I am new to linux. I have a directory in linux with approx 250,000 files I need to find count of number of files matching a pattern. I tried using following command : ls -1 20061101-20131101_kh5x7tte9n_2010_* | wc -l I got the following error message: -bash: /bin/ls: Argument list too long 0 Please...

JAVA 8学习笔记-第五章

Chapter 5 Class Design 1. Introduing Class Inheritance Inheritance is the process by which the new child subclass automatically includes public or protected primitives, objects or methods defined in the parent class. Java supports single, multiple-level inheritance, and does NOT support multiple...