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Official concept: AOP, that is, aspect oriented programming, can be said to be the supplement and improvement of OOP (Object Oriented Programming). OOP introduces the concepts of encapsulation, inheritance and polymorphism to establish an object hierarchy, which is used to simulate a set of public behaviors. However, OOP allows developers to de ...

1.Spring Cloud learning Feign declarative service invocation Hystrix fuse Gateway gateway 2.Feign 2.1 feign general • Feign is a declarative REST client, which uses interface based annotation to facilitate client configuration. • Feign was originally provided by Netflix, but does not support spring MVC annotation. Later, it was enca ...

1, STL STL (Standard Template Library): it is an important part of C + + standard library. It is not only a reusable component library, but also a software framework including data structures and algorithms. 2, string 1. Definitions String is a template class of string int main() { string s1("hello");//Construction object ...

The last article made a simple test on the PPT function of VSTO Office secondary development operation, mainly about how to create an add-on and add custom text information when creating a PPT slide, how to simply customize the task pane and how to add a visual function area. We should have a simple understanding of how VSTO operates ppt, This ...

DOM 1. What is DOM 2. Node (1) The childNodes property will obtain all nodes including text nodes. According to the blank space between DOM tags, it will also be regarded as text nodes. In IE8 browser, blank text will not be regarded as word nodes (2) The children attribute can get all the child elements of the current elemen ...

Holding fireworks to make a living, poetic to seek love catalogue 1. Principle introduction 2. Detailed steps 2.1 data acquisition 2.2 data center (Standardization) 2.3 finding covariance matrix 2.4 calculate eigenvalues and eigenvectors of covariance matrix 2.5 determining the number of principal components 2.6 calculation of princi ...

preface - 🏀 Hello, I'm BXuan, a sophomore of software engineering who loves programming and basketball - 📚 Recently, we are preparing for the blue bridge provincial competition in April. This chapter will talk with you about the hash table! If the text is wrong, please point out and forgive me. - 🏃 It's not hard to give up, but it must b ...

ES getting started HTTP Install ES Download from ElasticSearch official website , take the latest version as an example, elasticsearch-7.17.0-windows-x86_64.zip Unzip the compressed package, enter the bin directory in elasticsearch, and double-click elasticsearch Bat run, enter in the browser http://localhost:9200 , press enter, and the ...

In the above, we have roughly understood the usage of pydub library. Today's goal is to write a crawler to crawl song information. For web crawlers, there are corresponding packages in Python's standard library, which can be opened directly: https://docs.python.org/zh-cn/ Go to see the official Chinese documents of the corresponding version of ...

classification How to judge whether the sorting is stable Stable: if a is in front of b and a=b, a is still in front of b after sorting. Unstable: if a was originally in front of b and a=b, a may appear after b after sorting. 1. Bubble sorting Algorithm process: Compare adjacent elements. If the first one is bigger than the second, exchan ...