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preface In python crawlers, multi process crawling is generally used, because multithreading can not improve CPU utilization, and multithreading is actually executed alternately, and multi process is executed concurrently. Multi process, as the name suggests, multiple processes execute concurrently, which can effectively improve the execu ...

This is the first article in the Spring interview question series. The theme of this article is: the design patterns involved in Spring and how to answer in the interview as comprehensively, accurately and deeply as possible. This article only answers one question: What design patterns are used in Spring? How are the differences realized? ...

Relevant documents Pay attention to Xiaobian, and receive private letter Xiaobian! Of course, don't forget a three in a row~~ Yes, we can pay attention to the official account of Xiaobian yo ~ ~ Python log development environment Python version: 3.6.4 Related modules: pygame module; And some Python's own modules. Environment construction ...

Multithreading Multi task execution If there is no multitasking, multithreading is not required program Java source Program and bytecode file are called "Program", which is a static concept. process The program in execution is called process, which is a dynamic concept. In order for the computer program to run, the c ...

1. Definition of array An array is an ordered collection of data of the same type. Array describes several data of the same type according to a certain priority It is formed by arrangement and combination in the later order. Among them, each data is called an element, and each element can pass an index (subscript) To access them. Four basic fe ...

1, Code block introduction From: teacher Han Shunping's basic course explanation 1.1 basic introduction Basic introduction A coded block, also known as an initialization block, belongs to a member of a class [that is, a part of a class], which is similar to a method. It encapsulates logical statements in the method body and is surrounded by ...

Spring AOP aspect oriented programming AOP (aspect oriented programming), one of the three core ideas in Spring: In the software industry, AOP is the abbreviation of Aspect Oriented Programming, which means: Aspect Oriented Programming, a technology to realize the unified maintenance of program functions through precompile and runtime dynam ...

  catalogue 1, Content discussed in this paper 2, Tools and source code 3, Modbus overview 4, Modbus RTU communication protocol 5, Complete Modbus I / O code 6, Complete Modbus logic function 7, Testing and verification 1, Content discussed in this paper This paper briefly introduces the Modbus communication protocol, realizes t ...

preface Python: what? Writing crawler, you actually use java? you 're right! Today, break the routine and write a simple crawler in java. It is mainly based on java. Some functions need crawlers; It's a little late to change the question now, so I have to bite the bullet (no matter how ridiculous the road I choose, I have to finish o(﹏╥ ...

Related documents Pay attention to Xiaobian and receive private letter Xiaobian! Of course, don't forget a three in a row~~ Yes, we can pay attention to the official account of Xiaobian yo ~ ~ Python log development environment Python version: 3.7.4 Related modules: pygame module; tkinter module; Pilot module; And some python built-in mod ...