Articles
android

Kotlin Basics | Commissioning and Applications

Delegation is a common pattern, it has nothing to do with programming language, that is, delegate what you originally did to another object to do it. Both the decorator pattern and the agent pattern reuse behavior through delegation. Kotlin supports delegation at the language level. This article introduces Kotlin's delegation with examples. Kotlin's decorator pattern The decorator pattern and inheritance have the same purpose, both for extending the class, but it uses a more complicated way: inh

... Calvin
schedule 10 min read
android

7 practical Gradle tips you should know

Preface GradleinandroidThe application is very extensive in development, but I believe that many students don t know much about itgradle This article mainly introduces the use ofgradleSome practical tips to help readers improve their understanding of this familiar stranger mainly include the following 1.GradleDependency tree query 2. Use loop optimizationGradleDependency management 3. Support code hintsGradleDependency management 4.GradleModular 5.LibraryModuleGradleCode reuse 6. Resource file s

... Madison
schedule 9 min read
android

Basic case of getting started with RabbitMQ

Official website: www.rabbitmq.com/ Introduction RabbitMQ is the most widely deployed open source message broker. RabbitMQ has thousands of users and is one of the most popular open source message brokers. From T-Mobile  to Runtastic , RabbitMQ is used by small start-ups and large enterprises worldwide. RabbitMQ is lightweight and easy to deploy internally and in the cloud. It supports multiple messaging protocols. RabbitMQ can be deployed in distributed and federated configurations to meet

... Lily
schedule 17 min read
android

[Three-dimensional path planning] Three-dimensional trajectory planning of UAV based on matlab [including Matlab source code 270]

1. Introduction 1 Proposal of ant colony algorithm Ant colony optimization (ACO), also known as ant algorithm, is a probabilistic algorithm used to find optimized paths. It was proposed by Marco Dorigo in his doctoral dissertation in 1992, and was inspired by the behavior of ants finding paths in the process of searching for food. Genetic algorithms are used in pattern recognition, neural networks, machine learning, industrial optimization control, adaptive control, biological sciences, social s

... Paige
schedule 4 min read
android

Lifecycle usage and analysis of Jetpack components

What is Lifecycle? Official explanation: Lifecycle is a class that holds the information about the lifecycle state of a component (like an activity or a fragment) and allows other objects to observe this state. Personal understanding: Lifecycle is a tool (class) that manages the life cycle of components (Activity / Fragment), and can monitor life cycle changes in other components (except Activity / Fragment). This component is a very important part of the Jetpack Architecture Components library

... Matthew
schedule 12 min read
coder_life

Project learning-framework learning-Swagger3

Concept and function concept: Swagger is a standardized and complete framework for generating, describing, invoking and visualizing RESTful Web services. effect: Support API to automatically generate synchronized online documents. Another way is to write Office documents to provide interface documents. Provide Web page online test API. Another common way is to use postman test interface. SpringBoot integrates Swagger The minimum requirement for integration is that it can be used, similar to a He

... Avery
schedule 6 min read
coder_life

real! MySQL database: Hello, don't you run? Programmer: If you don't run away, you raise me?

Today s sharing has started, please give me your suggestions~ MySQL: Don't run away, okay? Programmer: If you don't run away, you raise me? MySQL: Let me explain it to you. Programmer: Take care of yourself first. This is a very interesting conversation I have seen before, and this is also a true portrayal. Today I m sharing the MySQL database. It s very important to lay a good foundation. I won t say much, the text begins~ One, the database 1.1 DBMS Database Management System: Database Manageme

... Silas
schedule 17 min read
coder_life

Two classification problem: text classification practice based on BERT! Attach complete code

Datawhale\ Author: Gao Baoli, Excellent Learner of Datawhale Message: Bert is naturally suitable for classification tasks. There are many methods for text classification, such as fasttext, textcnn, etc., but in front of Bert, it is a little bit of a shame. Recommended review display refers to selecting one of many user reviews as the reason for recommendation of the shop, in order to hope that more people will open the shop. \ This is like a recommendation system, because it is necessary to reco

... Brady
schedule 13 min read
coder_life

A 1-year journey of front-end technology framework switching

Summary: With a phone call, I started a one-year journey of switching front-end technology frameworks. This article is shared from HUAWEI CLOUD COMMUNITY " Remember an Unforgettable Front-end Technology Framework Switching Journey [WEB Front-end Battle] ", the original author: a cabbage. 1. The beginning of the journey At the beginning of 2020, on an ordinary working day, I was concentrating on "doing things" and received an espace voice from MAE-Access front-end technical experts, and was told

... Miguel
schedule 25 min read
coder_life

List of tag interface in ABAP Netweaver system

IF_ECATT_API_LOG_BLOCK_SCRIPT IF_ECATT_API_LOG_BLOCK_VARIANT IF_DO_CDL_UI_ELEM_SIMPLE_TEXT IF_DO_CDL_UI_ELEM_REFRESH_TIME IMF_EPM_CONFIRM_ORDER IMF_JUNIT_TEST_CM IF_CLB2_TEST_LIBRARY / GRCPI / GRIA_IF_SPM_MODEL IF_DRF_MANU_REPL IF_ESP_LOGGINGDATA IF_ESP_PERFORMANCEDATA IF_EX_ALERT_ACTION IF_EX_BADI_FILE_UPLOAD_GEN IF_EX_BADI_IMP_TEMP IF_EX_BBP_SEND_TO_PLANNING IF_EX_BBP_XML_CF_SEND IF_EX_CFG_KB_CHANGED / IWBEP / IF_V4_RESP_BASIC_REF_C / IWFND / IF_750_EXTENSIONS_TAG IF_SALV_GUI_OBSERV_MANAGER_ID

... Jack
schedule 6 min read
dev_tools

Deep Learning Notes The first week of the first course: Introduction to Deep Learning

This article is the notes part of teacher Wu Enda's deep learning course [1]. Author: Huang Haiguang[2] Main writers : Huang Haiguang, Lin Xingmu (all the manuscripts of the fourth lesson, the first two weeks of the fifth lesson, and the first three quarters of the third week), Zhu Yansen: (all the manuscripts of the third lesson), He Zhiyao (the third week of the fifth lesson), Wang Xiang, Hu Hanwen, Yu Xiao, Zheng Hao, Li Huaisong, Zhu Yuepeng, Chen Weihe, Cao Yue, Lu Haoxiang, Qiu Muchen, Ta

... Hudson
schedule 32 min read
dev_tools

Natural language processing in Python to generate word cloud WordCloud

Original link: tecdat.cn/?p=8585 Original source: Tuoduan Data Tribe Official Account     Learn how to perform exploratory data analysis on natural language processing using WordCloud in Python. What is WordCloud?   Many times, you may see a cloud filled with words of different sizes, which represent the frequency or importance of each word. This is called a tag cloud or word cloud . For this tutorial, you will learn how to create your own WordCloud in Python and customize it as n

... Alyssa
schedule 12 min read
dev_tools

14. Vue 2.0 two-way binding principle

premise There are many ways to achieve two-way binding. Vue adopts data holding combined with publish and subscribe design mode to achieve. Use Object.defineProperty() to hijack the setter and getter of each property, publish a message to subscribers when the data changes, and trigger the corresponding listener callback. Object.defineProperty() introduction Function: A more popular way of saying is to manipulate object properties Official: Define a new property directly on an object, or modify a

... Elijah
schedule 10 min read
dev_tools

[Translation] Highlights in Git 2.31

Original address: Highlights from Git 2.31 Original Author: Taylor Blau Translation from: Nuggets Translation Project Permanent link to this article: github.com/xitu/gold-m... Translator: Badd Proofreaders: PassionPenguin , PingHGao Highlights in Git 2.31 The open source project Git recently released version 2.31 , with 85 contributors bringing new features and bug fixes, of which 23 are new entrants. The last time we synchronized the version update with you was when Git 2.29 was just released.

... Isabel
schedule 11 min read
dev_tools

What are the changes in React18?

Text/Youlu React 16 -> 17 -> 18 It may be that there are too many incompatible changes from React 15 to 16, and it is quite painful for developers to upgrade. Therefore, for a long time, React developers did not release new versions, but integrated various new capabilities on v16, 16.3/16.8/16.12 Interesting new features appear almost every few versions. After 2 and a half years of v16 version, the React team released v17, and at the same time announced that this version is positioned as

... Luke
schedule 13 min read
programming

Three, the log of the SpringBoot framework

1. Log Framework Origin of the log: Output key data to the console during system development; Too many console output statements in the system are not easy to maintain, and the console output statements are integrated into a log jar package xxxlogging.jar Upgrade the log jar package to generate a new log jar package,xxxlogging-update.jar Facing the problem of replacing the log jar package that has been used in the system; Refer to the relationship between JDBC and database drivers (JDBC is just

... Kai
schedule 16 min read
programming

other

Large number operations: Multiply strings Topic: Multiplying numbers represented by two very large strings Solution: According to the vertical calculation, multiplication according to multiplication. Use an array to store the result of each single bit multiplication. Then use string addition for addition. /** * @param {string} num1 * @param {string} num2 * @return {string} */ var subMultiply = function(num1, num2) { let result = [], rest = 0; for (let i = num1.length-1; i >= 0; i--) { let cur

... Jason
schedule 25 min read
programming

InnoDB general table space

General table space The regular table space isInnoDB useCREATE TABLESPACEThe shared table space created by the syntax. The following topics in this section describe general tablespace functions below: Conventional table space functions Create a general table space Add the table to the regular table space Regular tablespace row format support Use ALTER TABLE to move tables between table spaces Delete general table space Conventional table space restrictions Conventional table space functions The

... Hudson
schedule 12 min read
programming

webpack

Entry entry ,webpack , entry , webpack context webpack , , Webpack webpack --context context,context entry entry string'./app/entry' array['./app/entry1', './app/entry2'] object{ a: './app/entry-a', b: ['./app/entry-b1', './app/entry-b2']} Chunk array output.library Chunk Webpack Chunk Chunk Entry entry string array Chunk Chunk main entry object Chunk Chunk object Entry // entry: () => { return { a:'./pages/a', b:'./pages/b', } }; // entry: () => { return new Promise((resolve)=>{ resolv

... Landon
schedule 11 min read
programming

Speaking from scratch: 3. Arrays and collections

Array 1. Concept and use Definition A variable can only store one data. If you want to store multiple data, you need to use an array to complete the data collection of the same type. The array is actually a container The characteristics of the array: It is required to store the same type of data The number of elements must be clarified when storing substance Array is a kind of java container Array is actually a container that stores a fixed number and must be the same type of elements classifica

... Angel
schedule 29 min read
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