Programming - Birost

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100 Basic Python Interview Questions Part Three (41-60) Python topic month

This article is participating in the "Python theme Month" view details about the active links 100 basic Python interview questions part one (1-20) Python topic month 100 basic Python interview questions Part 2 (21-40) Python topic month 100 basic Python interview questions part three (41-60) Python topic month Q-1: What is Python, what are the benefits of using it, and what is your understanding of PEP 8? Q-2: What is the output of the following Python code snippet? Prove your answer. Q-3: If th

programming

C language programming column index

This blog post is based on the index of the C language programming column. Click on the topic below to jump to the blog post, which is more convenient for everyone to read and browse~ the first week C language programming The first week Input the value of the radius r of the circle, and output its area. C language programming The first week Enter a certain day, certain month, and determine that this day is the day of the year. C language programming The first week Output 9*9 multiplication tabl

programming

gRPC Node

Shopee qps Node Node Shopee gRPC Node gRPC gRPC What is gRPC gRPC is a modern, open source remote procedure call (RPC) framework that can run anywhere. It enables client and server applications to communicate transparently, and makes it easier to build connected systems. Read the longer Motivation & Design Principles post for background on why we created gRPC. gRPC Google rpc HTTP2 Protocol Buffers Google rpc What is protobuf hello.pb // The greeter service definition. service Greeter { //

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Implementation of the homepage of the e-commerce background management project

One, page layout <template> < div class = "home" > < el-container class = "home-conatiner" >  < el-header > < div > < img src = "../assets /logo.png" alt = "" /> < span > E-commerce background management system </ span > </ div > < el-button type = "info"@ click = "outlogin" > Sign out</ el-button > </ el-header >  < el-container >  <

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[Vue3 from entry to actual combat advanced to master the complete knowledge system] Advanced grammar in 025-Vue: custom vue instructions

2. Custom vue instructions Use ref to get focus You can get the DOM through ref, and then manipulate the DOM to get the focus <!DOCTYPE html > < html lang = "en" > < head > < meta charset = "UTF-8" > < meta http-equiv = "X-UA-Compatible" content = "IE=edge" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title > hello vue </ title >  < script src = "https://unpkg.com/vue@n

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[Package 02-Design Mode] Command Mode Flyweight Mode Combination Mode Agent Mode Strategy Mode

navigation [react] Hooks [Package 01-Design Pattern] Design Principles and Factory Pattern (Simple Abstract Method) Adapter Pattern Decorator Pattern [Package 02-Design Pattern] Command Pattern Flyweight Pattern Combination Pattern Agent Pattern [React Practice from Zero 01-Background] Code Division [React Practice from Zero 02-Background] Permission Control [React Practice from Zero 03-Background] Custom hooks [React Practice from Zero 04-Background] docker-compose deploy react+egg +nginx+mysql

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MySQL database-MySql index & view & stored procedure

MySQL index What is an index In the database table, indexing the fields can greatly improve the query speed. By making good use of these indexes, MySQL queries and operations can be made more efficient. If the MySQL with a reasonable design and use of indexes is a Lamborghini, then the MySQL without the design and use of indexes is a human tricycle. Take the directory page (index) of a Chinese dictionary for example, we can quickly find the word we need in the directory (index) sorted by pinyin,

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React hooks report error: Rendered fewer hooks/Rendered more hooks

This is used during project developmentreactoffunction componentwithhooksFor the problems encountered, in the process of writing code, I will choose to use the entire page-level fileclassIn the form of writing, but in the function or logic is relatively simple, such as pure display components, I will choose to usefunction componentAt the same time supplemented byhooks Rendered more hooks than during the previous render Before describing the actual situation of the project, let s take a look at o

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AI basics: an easy introduction to data visualization (Matplotlib and Seaborn)

0 Introduction Matplotlib is a Python 2D plotting library that generates publication-quality graphics in various hardcopy formats and a cross-platform interactive environment. With Matplotlib, developers can generate plots, histograms, power spectra, bar graphs, error graphs, scatter plots, etc. with just a few lines of code. Seaborn is a very popular graphics visualization library based on Python. On the basis of Matplotlib, a more advanced package is carried out to make drawing more convenient

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Redis basic series (three)-list object

This is the 5th day I participated in the Wenwen Challenge. For details of the event, please view: Wenwen Challenge 1. Introduction to list objects The Redis list is a simple list of strings, sorted according to the insertion order, and supports adding elements from the head or tail, so the list object is often used as a queue. A list key can contain at most232 12^{32-1}23 2 1 element. Commonly used commands for list objects are as follows: lpush key value1[value2] //Insert one or more values in

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Redux application architecture foundation-what is Redux? How to achieve?

This is the 17th day of my participation in the Wenwen Challenge . For details of the event, please see: Wenwen Challenge . Preface ReduxSince its birth in 2015, it has quickly swept the React community and is highly regarded. So what is it, how to use it, and what pain points can it solve in the React application development process? In this article, we will learn Redux together and simply implement a Redux. At the same time, we will also talk about how to use middleware to enhance the capabili

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Java multithreading knowledge points summary manual!

This is the 29th day that I participated in the Wenwen Challenge. For details of the event, please view: Wenwen Challenge 1. Processes and threads 1.1 Process Process is a program running on the system, is the basic unit of resource allocation, each process has its own address space . The Process Control Block (PCB) describes the basic information and running status of the process. The so-called creation and cancellation process all refer to the operation of the PCB; 1.2 Thread A thread is the

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Algorithm Tips 2: Dynamic programming in one article

This is the challenge I participated in more text on the 8th day, event details see: more text challenge Recently, I want to sort out my own experience of brushing algorithm problems. On the one hand, for review and consolidation, on the other hand, I also hope that my sharing can help more friends who are learning algorithms. The name of the column is "Algorithm Tips" . When explaining the algorithm, it will pay attention to the overall structure, but it will not cover everything. It is suitabl

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How to correctly create and destroy Java objects

Public number: Java Little Coffee Show , website: javaxks.com Author: RonTech, link: blog.csdn.net/zyhlwzy/article/details/78937421 1. Introduction Java was invented by Sun Microsystems and released in 1995. It is one of the most widely used programming languages in the world. Java is a general-purpose programming language. It has attracted many developers because of its powerful library, runtime, simple syntax, platform independence (Write Once, Run Anywhere-WORA), and awesome community. In th

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matplotlib

from matplotlib import pyplot as plt x = range(2,26,2) y = [15,13,14,17,20,25,26,26,27,22,18,15] plt.plot(x,y)# plt.show() plt.figure(figsize=(20,10),dpi=80) from matplotlib import pyplot as plt x = range(2,26,2) y = [15,13,14,17,20,25,26,26,27,22,18,15] plt.figure(figsize=(20,10),dpi=80) plt.plot(x,y) plt.show() plt.savefig("./t1.png") .svg from matplotlib import pyplot as plt x = range(2,26,2) y = [15,13,14,17,20,25,26,26,27,22,18,15] plt.figure(figsize=(20,10),dpi=80) plt.plot(x,y) plt.savef

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Use Vue to develop the project (dark horse headline project) - day 6

The main functions that need to be implemented are as follows: Information list, tab switching, article reporting, channel management, article details, reading memory, follow function, like function, comment function, comment reply, search function, login function, personal center, edit data, Xiaozhi classmates... The function to be realized today is mainly: search function inlayout/layout.vuein 0 Realize the function of displaying mine and not logged in according to whether the user is logged i

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Functional components in vuu2

Functional component A functional component is a state that does not holddata, InstancethisAnd life cycle components. Functional components have no data, life cycle, andthis, Functional components are also called stateless components. Template definition: <template functional> <div> <h1>{{ props.title }}</h1> </div> </template> <script> export default { name: 'FunOne', props: { title: [String], }, } </script> <style></style> render expo

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SpringBoot source code analysis (1): preparations before run

In order to better learn and consolidate SpringBoot's knowledge system, we need to study the source code to understand what SpringBoot does for us? How to do it Where can we customize? Next, we will solve these problems through source code analysis. Start of SpringBoot When we write SpringBoot applications, we will define a SpringBoot startup class. There is no requirement for the naming of this class, but it needs to be added to the class@SpringBootApplicationAnnotation to indicate that this cl

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Temporal Convolutional Network (TCN)

Basic structure of TCN Temporal Convolutional Network (TCN) was proposed by Shaojie Bai et al. in 2018 and can be used for time series data processing. Please see the paper for details . 1. Causal Convolution (Causal Convolution) The causal convolution is shown in the figure above. For the value at time t in the previous layer, it only depends on the value at time t and before in the next layer. The difference from traditional convolutional neural networks is that causal convolution cannot see f

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HashTable analysis of JDK collection source code

Comparison of HashTable and HashMap For the analysis of HashMap source code, you can refer to: HashMap analysis of JDK collection source code (top) and HashMap analysis of JDK collection source code (bottom) , HashMap bottom red-black tree implementation (implement a simple red-black tree by yourself) 1. The inheritance system of the two is different HashTable HashMap It can be compared from the figure that both are derived from the Map interface, and both implement the Cloneable and Serializabl

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