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Preface There is an old saying in China that "nothing is more than three times". It means that a person who has made the same mistake can be forgiven twice and three times at a time, and can't be forgiven more than three times. It has been pointed out that this "three" is an imaginary number, which is used to refer to many t ...

What is beautifulsoup: Is a Python library that can extract data from HTML or XML files.It enables you to navigate, find, and modify commonly used documents through your favorite converter.(Official) beautifulsoup is a parser that parses content specifically, eliminating the hassle of writing regular expressions. Here we are using bs4: 1. Impor ...

brief introduction The way to realize panorama is to replace the img object of material.map directly after the panorama image is obtained successfully, and then inform three.js that its material.map has been updated, and then the scene image has been replaced. Simple example setInterval(function () { var material = mesh.material ...

We connect Linux to implement regular expressions 1. Python3 Regular Expressions Regular expressions are a special sequence of characters that help you easily check if a string matches a pattern. Python has added the re module since version 1.5 to provide Perl-style regular expression patterns. The re module gives the Python language full ...

1, What is this keyword this is a keyword in java; This can be a reference or a variable in java. When it is a variable, the memory address saved in the variable points to itself, and this is stored in the JVM heap memory java object   2, What is the function of this keyword 1. The first function of this keyword is to pass the value of the loc ...

Vue Learning Notes (2) Built-in Instructions and Forms 1. Built-in Instructions 1. Basic Instructions v-cloak: It does not require an expression; it is removed from the bound HTML element at the end of the Vue instance compilation and is often used in conjunction with display:none of CSS. [v-cloak] { display: none; ...

Reading this article suggests looking at the table of contents first to grasp the overall context. It's better to have used or customized annotations. Even if you haven't used annotations, the examples in this article must be typed by yourself. This article will take you a step further to uncover the true face of annotations. If you don't un ...

Guide reading Articles published the other day Spring boot multi data source dynamic switch and Spring boot: a huge pit for integrating multiple data sources In, it is mentioned that adding @ Primary interface to dynamic data source will cause circular dependency exception, as shown in the following figure: This is a typical constructor dep ...

1. Message mechanism 1.1 post series By looking at the source code, it is known that the sendMessageDelayed method is the last call made by post(Runnable r), postDelayed(Runnable r, long delayMillis): // post public final boolean post(Runnable r){ return sendMessageDelayed(getPostMessage(r), 0); } // postDelayed public final boolean postDe ...

Suppose we have class A, class B and class Test. Class Test has all the attributes of class A and class B, and they all have the temp attribute. Now we need to set and read the temp attribute in class Test, so write the following program: #include <iostream> class Base{ public: int temp; }; class A : public Base{ }; class B : publi ...