Programmer Think

preface In the traditional SSM project, mybatis is the database connection framework commonly used in our development program, and we often ask about the implementation principle of mybayis in the interview. Therefore, we need to fully understand its underlying principle, and now we can preliminarily understand mysql through a custom frame ...

Chinese ant sword is an open source cross platform website management tool. It is mainly for legally authorized penetration test security personnel and website administrators who conduct routine operations. Generally speaking, Chinese ant sword is a shell control software better than kitchen knife. China ant sword advocates the modular de ...

definition The position attribute is used to specify the position of an element on the web page. It is mainly described through three dimensions: benchmark, whether to take off the mark and occupy the position, and whether to set the margin. There are five positioning methods: static, relative, absolute, fixed and sticky. Before talking about ...

SpringBoot Microservice architecture Separate each functional element and dynamically combine the independent functional elements. Only the required functional elements can be combined. When more functional elements are needed, multiple functional elements can be aggregated. Therefore, the microservice architecture copies the functional eleme ...

How to install OpenCV on Ubuntu 20.04 OpenCV(Open Source Computer Vision Library) is an open source computer vision library that supports C++, Python, and Java on all major operating systems. It can work with multicore processes and GPU Accelerated for real-time operation. OpenCV is widely used, including medical picture analysis, street view ...

Stream is an abstract concept of processing sets in Java 8, which can perform complex operations such as finding, filtering and mapping. stay Operation API The Stream API provides an efficient and easy-to-use way to process data: It is not a data structure and will not save data;If the data source is not modified, the operation result wi ...

The last article compared the differences among cookies, localstorage and sessionstroage. It mentioned that cookies need to be specially encapsulated, while the other two have special get and set methods. Today is the main day. Look at the encapsulation of cookies in the actual project.First, let's take a look at the properties and methods of c ...

Constructor Constructor is a special member function It is executed every time a new object of the class is created The constructor name is exactly the same as the class name and does not return any type Constructors can be used to set initial values for some member variables Format: Class::Class(); // Constructor Default constructor ...

1, Introduction 1 Overview BP (Back Propagation) neural network was proposed by the scientific research group headed by Rumelhart and McCelland in 1986. See their paper learning representations by Back Propagation errors published in Nature. BP neural network is a multilayer feedforward network trained by error back propagation algorithm. It ...

3.sildUp() and sildDown() methods Description: slideUp() indicates that jq objects are slid up and hidden, and slideDown() indicates that jq objects are pulled down. be careful: Even if these two methods do not write parameters, they have a certain animation time by default, but the time is shortSimilarly, numbers can be written in these t ...