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    now let's talk about another method for finding the minimum spanning tree - Kruskal algorithm. We know that there can be no loop in the minimum spanning tree, so we skip when we encounter the edge forming the loop, but how can we until the loop is formed? At this time, we need to judge whether the two vertices are connected. ...

0. Create react project Now create a react project using the create react app, the official scaffold of react: Step 1: install scaffold NPM install - G create react app globallyStep 2: switch to the directory where you want to create the project and use the command: create react app react_ projectStep 3: switch the directory to the projec ...

Use selenium+chromedriver+xpath to crawl dynamically loaded information Use selenium to crawl dynamically rendered pages. Selenium is a browser automation testing framework and a tool for Web application testing. It can run directly in the browser and drive the browser to perform specified actions, such as click, drop-down, fill in data, del ...

All the code in this article comes from jdk1 eight Introduction to ArrayList public class ArrayList<E> extends AbstractList<E>         implements List<E>, RandomAccess, Cloneable, java.io.Serializable ArrayList inherits AbstractList and implements list, randomaccess, Cloneable, Java io. Serializable interface java.lang.Ob ...

Simple discussion on decoration mode 1. Brief description of decoration mode Decoration pattern is a design pattern used to replace inheritance. It dynamically adds responsibilities to objects without defining subclasses, and uses the association relationship between objects to replace the inheritance relationship between classes. It reduc ...

Valentine's Day is coming, and the annual abuse of Wang opera is coming once again. What is lipstick, Bing dwen dwen, Xiao Bing Bai, ice Pier? It's really low. We have our own set of tools to express our thoughts. Want to see what kind of sparks can the most rational code and the most romantic advertisement collide? Next, sister Yien will ...

With the help of openpyxl module, we can also write excel files in python. This process is a bit similar to reading Excel spreadsheets in python. Using python Excel writer, we will create an excel worksheet and write text, numbers and formulas in cells. After modification, we will save the workbook. We will also add and delete worksheet ...

catalog: I Concept & principle Previously, we understood the binary search tree, but we found that if the data is orderly or close to orderly, the binary search tree will degenerate into a single tree AVL tree is a balanced binary tree. It just adds a balance factor to the binary search tree to form the current balanced bi ...

1. Thermal repair 1.1. effect Serious bugs need to be solved immediately without repackaging and putting on the shelf.Solve the problem that the version upgrade rate is not high, and the Bug will always affect users who do not upgrade the version.Realize short-term version coverage of small functions, such as festival activities. 1. ...

Word vector is a vector used to express the meaning of words, and can also be regarded as the feature vector of words. The technology of mapping words to real vectors is called word embedding. 1, Word embedding (Word2vec) The unique heat vector can not accurately express the similarity between different words. word2vec is proposed to so ...