Programming - Birost

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New features of JDK1.8 (four): functional interface

The last article about Lambda expressions makes you love it . It simply talks about the syntax and usage of Lambda expressions, which makes you feel good about it. You may not know how Lambda expressions are implemented and defined. This article will introduce the functional interface in detail , so that you can be aware and confident when using the new features of the JDK. One, functional interface Functional interface (functional Interface), an interface with one and only one abstract method ,

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A simple introduction to machine learning-with recommended learning materials

How to get started with machine learning? There is currently no clear answer. This site is for beginners and recommends easy entry routes and learning materials for machine learning (including deep learning). After you get started, you will know which part of your knowledge you need to enhance, and you will also know what materials to look for to learn. 1. Formal learning route of machine learning \ How to learn machine learning well? The normal route looks like this: 1. Learn the basics of math

programming

js notes

Know the browser The part that the user can operate is called the shell outer core mainstream browser core IE trident Chrome webkit/blink firefox Gecko Opera presto The part that the browser cannot display is called the kernel rendering engine: html css syntax recognition drawing js engine: other modules Google browser v8 engine developed in 2008: the fastest translation of js code into mechanical code The browser is multi-threaded: 1. js engine 2. UI engine 3. event thread 4. request thread 5.

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Two points of attention in the realization of log output of SpringBoot basic series AOP combined with SpEL

[SpringBoot basic series] AOP combined with SpEL to realize log output notes one or two Everyone is familiar with using AOP to print logs. Recently, in the process of using it, several interesting problems have been discovered. One is the analysis of SpEL, and the other is the output of parameters in JSON format. I. Project environment 1. Project dependencies This project usesSpringBoot 2.2.1.RELEASE + maven 3.5.3 + IDEADevelop Open a web service for testing < Dependencies > < dependen

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The 10th Blue Bridge Cup Individual Finals Group B

A. Square sequence topic Xiao Ming wants to find two positive integersXXX andYYY , meet2019<X<Y2019<X<Y2 0 1 9<X<Y 201922019^22 0 1 92 ,X2X^2X2 ,Y2Y^2Y2 compose an arithmetic sequence. Please find out of all possible solutions,X+YX+YX+What is the minimum value of Y ? Ideas Since it is a fill-in-the-blank question, you can violently enumerate the numbers in a range to determine whether it is the minimum value. Code # include <bits/stdc++.h> using namespace std; typedef lon

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[Paper Notes] HGMF: Heterogeneous Graph-based Fusion for Multimodal Data with Incomplete

HGMF: Heterogeneous Graph-based Fusion for Multimodal Data with Incompleteness Paper link Background introduction With the advancement of data collection technology, multi-modal data is increasing rapidly. Multi-modal data fusion has effectively improved performance in various application scenarios, such as target detection, sentiment analysis, sentiment recognition, and medical detection. Early research has combined multi-modality to learn joint representation or perform prediction, including s

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React-Router source code analysis

Simple use of React-Router Official document Handwritten mini React-Router Link React-Router versus Vue-Router middle LinkIt is essentially a tag. import {Component} from "react" ; export default class Link extends Component { render () { Const {to, Children, ...} = restProps the this .props; return < A the href = {} to { ... restProps }> {} Children </ A > ; } } Copy code BrowserRouter according toReact-RouterIn the library,RouterYesreact-router-domwithreact-router-nativeThe public

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"Django Web Framework Notes 1"

table of Contents [TOC] Course features: Difficult to learn, most of the content needs to be understood and memorized More files are confusing Focus on the use of the framework during the learning phase, and focus on the realization of business logic during the work phase Strong comprehensive application, few small exercises Introduction to Django framework Released in 2005, an open source web framework written in Python In the early days, Django was mainly responsible for news and content manag

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[ID card recognition] ID card number recognition based on matlab GUI [including Matlab source code 014]

1. Introduction ID card number recognition based on matlab GUI Second, the source code function varargout = homework2(varargin) % HOMEWORK2 M-file for homework2.fig % HOMEWORK2, by itself, creates a new HOMEWORK2 or raises the existing % singleton*. % % H = HOMEWORK2 returns the handle to a new HOMEWORK2 or the handle to % the existing singleton*. % % HOMEWORK2( 'CALLBACK' ,hObject,eventData,handles,...) calls the local % function named CALLBACK in HOMEWORK2.M with the given input arguments. % %

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Vue.js source code learning-data driven

Vue.js source code learning-data driven Vue.jsA core idea is data-driven. The so-called data-driven means that the view is generated by data-driven, and the modification of the view does not directly operateDOM, But by modifying the data. Compared with traditional front-end development, such as usingjQuery Wait for the library to directly modify DOM, Which simplifies the amount of code. When the interaction is complex, only caring about data modification will make the logic of the code very clea

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Detailed Codis installation and deployment

The introduction and installation on Codis github is very complete, and there are also Chinese/English, but follow the steps of github to install, there will be some holes, so there is such an article. In the previous article, "Redis Practical Monitoring Tools List" , the monitoring tools commonly used in Redis were introduced. Codis has a graphical panel and management tools. So there is such an article. Desktop system: Centos7. v Introduction Codis is a distributed Redis solution. For upper-l

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Don't be afraid of the principle, architecture, implementation, practice, and interview of "search" (worthy of collection)! ! !

Perhaps 99% of students do not do search engines, but 99% of students must have implemented the search function. Searching, searching, and what technical things are included in it, I hope this article can give you some enlightenment. What is the structure and process of the entire network search engine? The macro structure of the entire network search engine is shown in the figure above. The core subsystem is mainly divided into three parts (the pink part): (1) Spider crawling system ; (2) sear

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Vite source code analysis (1): resolveConfig parameter analysis

Vite resolveConfig analysis This article aims to analyze the function resolveConfig that parses config in vite source code. config source inlineConfig , from the command line or npm script. vite.config.* , the user's configuration file. Plugin.config , the configuration options returned by the plug-in's config method. Involved function Set --configFile false to disable the configuration file Load plugins on demand Mandatory order of plugins Load the .env file plugin.config hook function plugin.c

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Develop chrome plug-in to realize crawler

Hello everyone! I am a fan of front end~Caiji H demand After the plug-in is installed, the page request of the entire browser is intercepted, and the interception interface can be specified through the plug-in configuration to display, including downloading and exporting the intercepted data content, which can cooperate with the back-end to do many things problem Intercept all requests to assemble request information and results The plug-in and the page communicate with each other and do corresp

programming

The first step into the front end requires further learning

I received the first interview in my life this morning. The interview was very happy, but because of the first interview, I was very nervous, maybe because I only prepared the interview questions for 2 days, the reason is not enough. From the initial conversation to the awkward ending, the key point is to know my shortcomings. I believe that I will be greatly inspired in the following study. I will review my interview today. At the beginning, I received a call, but because it was a mobile phone,

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[Front end] Catch it all in one go-8 handwritten codes that must be met in front-end advancement and interviews

1 Handwritten Promise series In the Promise of study, also written before relevant share articles, please see the "front-end [white] started from the perspective of Promise, Async / await and Shredded Code" . 1.1 Promise.all //Handwritten promise.all Promise .prototype._all = promiseList => { // When the input is a promise list const len = promiseList.length; const result = []; let count = 0 ; // return new Promise ( ( resolve,reject )=> { // Loop through the promise events in the promise

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8 common SQL errors

1. LIMIT statement Paging query is one of the most commonly used scenarios, but it is also usually the most problematic place. For example, for the following simple statement, the general DBA thinks of is to add a composite index on the type, name, and create_time fields. In this way, conditional sorting can effectively use the index, and the performance can be improved rapidly. SELECT * FROM operation WHERE type ='SQLStats' AND name ='SlowLog' ORDER BY create_time LIMIT 1000, 10; Copy code Well

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Introduction to Probability Theory and Mathematical Statistics

We have seen that probability theory actually reduces common sense to calculations. It enables us to use our rational minds to accurately evaluate intuitions and insights that are often unable to explain clearly. Attractive Yes, probability theory, a science that originated from thinking about games of chance, should have long been the most important part of human knowledge... What are the most important problems in life are mostly just problems of probability theory. Marquis of Laplace (Pierre

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Design Pattern Learning 22 (Java Implementation)-Interpreter Mode

Write in front Take notes on learning design patterns Improve flexible use of design patterns Learning address www.bilibili.com/video/BV1G4... www.bilibili.com/video/BV1Np... Reference article c.biancheng.net/view/1317.h... Project source code gitee.com/zhuang-kang... 24, interpreter mode Design a software to perform addition and subtraction calculations. Our first idea is to use tool classes to provide corresponding addition and subtraction tools. //Used to add two integers public static int ad

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Getting started with SpringCloud and creating distributed projects

This is the 29th day I participated in the more essay challenge. For details of the event, please view: Event link 1. Understand microservices 1.1 What is a microservice Microservices is an architectural style Split an application into a set of small services Each service runs in its own process, which means it can be deployed and upgraded independently Lightweight HTTP interaction between services Services are split around business functions Can be independently deployed by a fully automated de

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