Articles
android

Go Language Tutorial Series (6): In-depth Analysis of Arrays and Slices Go Topic Month

Preface Everyone knows that a slice is an array that can grow dynamically. You can refer to the Java List Array Characteristics of arrays The array is a fixed-length contiguous space (memory area), the length is fixed, so it is rarely used in the go language The type of all elements in the array is the same. By default, each element of the array is initialized to zero corresponding to the element type The length of the array is an integral part of the array type, so [3]int and [4]int are two dif

... Ezekiel
schedule 20 min read
android

Lifecycle of Jetpack

1. What is Lifecycle Lifecycle is a component that has the ability to sense the life cycle of the host. It can hold information about the life cycle state of components (such as Activity or Fragment) and allows other observers to monitor the state of the host. It is also the core foundation of the Jetpack component library, including LiveData, ViewModel components that we will talk about, are also implemented based on it. No longer have to manually distribute the host life cycle, no longer have

... Emily
schedule 16 min read
android

[This I can do] Implement Xiaomi's new logo in a variety of ways (including two million generators)

Recently, Xiaomi s new logo can be said to have caused a new round of complaints and carnivals. This two million-designed logo is not small, but it is also a sense of life and super elliptical. Although it is said that a hammer is not worth money, Knowing where to knock is the most rare", but this effect similar to the desktop theme icon still makes some netizens spit "I can do it, I can also", then, on April 1st, a day when you can dream casually, come and try how to earn How about a few 2 mill

... Nolan
schedule 11 min read
android

Tencent faces the interview questions of the ArrayList collection, and takes you to answer these questions through source code analysis

I am Chenpi, an ITer in Internet Coding. Search for " JavaLib of Chenpi " on WeChat and read the latest article as soon as possible. Reply to [ Information ] to get my carefully organized technical information, e-books, first-line interview information and excellent. Resume template. 1 Introduction ArrayList is one of the data structures in the most frequently used collection framework in development, and it is also a must-question question in interviews. So it is necessary to master it and use

... Hunter
schedule 18 min read
android

Front-end engineering-making a company's scaffolding

Effectiveness introduction As the concept of front-end engineering continues to deepen, more and more people choose to use scaffolding to build their own projects from zero to one. The one that everyone is most familiar with iscreate-react-appwithvue-cli, They can help us initialize the configuration and generate the project structure, automatically install dependencies, and finally we can run the project with a line of instructions to start development, or to build the project. These scaffolds

... Grace
schedule 9 min read
coder_life

Talk about bat (dos) script

Get two direct random numbers @ echo off :memu set /a rd=%random%%%21 if %rd% lss 11 goto memu echo %rd% pause Copy code Get current ip for /f "delims=: tokens=2" %%i in ( 'ipconfig ^| find /i "IPv4"' ) do set ip=%%i echo -------------- ------------------ echo Access IP% ip% copy the code Implement the post interface that requests ten times per minute @ echo off echo Inventory synchronization... SET Sender1=0 :loop call:sleep 100 curl http://xxx.xxx.xxx.xxx:8080/api/xxxx -X POST -H "Content-Type

... Summer
schedule 37 min read
coder_life

QColor

Article source: blog.csdn.net/free_progra... QColor class reference QColor is used to provide color values based on RGB, HSV, CMYK and other components. Public Types enum Spec {Rgb, Hsv, Cmyk, Hsl, Invalid }\ Public function: [cpp]   view plain copy QColor ()             QColor (int r, int g, int b, int a = 255)             QColor (QRgb color)     &nbsp

... Brandon
schedule 34 min read
coder_life

Epoll timer implementation series articles: linux c++ uses timerfd and epoll to encapsulate the timer (Timer) class

blog.csdn.net/sumkee911/a... Introduction to the program: 1. Encapsulate the functions of timerfd and epoll into a class, timerfd is responsible for creating a timer, and epoll is responsible for waiting for the timer to time out, and then calling the callback function set by the user. 2. As for the basic functions of timerfd do not understand, just refer to the technical article of this great god: blog.csdn.net/oxp7085915/... 3. As for the basic functions of epoll do not understand, please refe

... Sydney
schedule 5 min read
coder_life

Summarize some tips in JavaScript

This article mainly records the javascript skills that I got from my own practice, learned in the blog, and seen in the source code of some projects. Some things can be said to be kinky tricks, and some may be some practical new grammars in ES6+. The magical effect of && and || Sometimes we need to execute another function when a function or variable is true. E.g:[JavaScript] Plain text view Copy code?1234567const task1 = () => { console.log('Execute task1'); return Math.random() >

... Ayden
schedule 8 min read
coder_life

React, elegantly catch exceptions

This is the 7th day I participated in the Wenwen Challenge. For details of the event, please view: Wenwen Challenge Companion chapter React, advanced chapter for elegantly catching exceptions, including Hooks solution Preface No one is perfect, so the code will always make mistakes. Errors are not terrible. The key is how to deal with them. I just want to ask you how to catch errors in the react application? at this time: Xiaobai+++: How to deal with it? Xiaobai++: ErrorBoundary Xiaobai+: ErrorB

... Ella
schedule 12 min read
dev_tools

Jerry's sharing at the 2020 SAP Global Technology Conference: the text version of SAP Spartacus technology introduction

This is Jerry's 86th article in 2020, and it is also the 268th original article in Wang Zixi's public account. The video version of this article is as follows: v.qq.com/x/page/b321... This sharing is part of the SAP 2020 Global Technology Conference (SAP TechEd), one of the ultimate experience sub-forums in the "customer independence" era: The sharing of this article is mainly divided into the following four aspects to introduce Spartacus. First of all, through the introduction of the four major

... Ella
schedule 17 min read
dev_tools

I/O control mode-polling, interrupt, DMA, channel

Reprinted from www.cnblogs.com/niuyourou/p... as a personal learning use, if infringement, please contact me to delete I/O devices are an important part of computers. Due to the complexity of the interaction between processors and I/O devices, I/O operations have always been a technical point that is difficult for high-level language developers to master. Because the high-level language encapsulates I/O operations based on the system functions provided by the operating system, and the way these

... Adrian
schedule 21 min read
dev_tools

[Translation] Personal Development for Smart People Chapter3 Power

The most powerful person is the one who can control himself. SENECA Strength is the third principle of personal development. It is your innate ability to consciously change the world around you. When you are weak, you cannot meet your needs and desires, and you become a victim of the environment; when you are strong and successfully create the life you want, your surrounding environment will also reflect this fact. For some people, power is a dirty word, and it is always associated with the neg

... Miguel
schedule 43 min read
dev_tools

springboot ( )

! springboot :        1.        2. ?        3. git, git ?        4. actuator        5.        6. springcloud bus java jar ( jdk8 jar) springboot 1. ( ) 2. spring 3. springboot java nio spring bean BeanDefinition map BeanDefinition java Class Class spring BeanDefinition BeanDefinition spring spring @Value , : private void updateValue(Map<String,Object> props) { Map<Str

... Natalie
schedule 11 min read
dev_tools

Employment Information Statistics Network (interface document)

basic configuration Base address: 1. API authentication uses token authentication uniformly, and data returns uniformly uses json. The server opens cors to solve cross-domain problems. 2. Request method GET (SELECT): Retrieve resources (one or more items) from the server. POST (CREATE): Create a new resource on the server. PUT (UPDATE): Update the resource on the server (the client provides the complete resource after the change). DELETE (DELETE): Delete resources from the server. Interface fail

... Lucas
schedule 21 min read
programming

Top 10 practical Java refactoring and optimization tips, which ones have you used?

Today I will discuss with you a few tips on code refactoring. Part of these content comes from books, and part comes from some practical experience in the LZ maintenance project. \ There are many refactoring methods. Relatively speaking, the coverage of an article is naturally unable to mention all of them. LZ can only propose some methods that are often used in ordinary times, such as some more high-end methods. You are interested. You can find some specialized books to study. Not much nonsense

... Isaiah
schedule 12 min read
programming

Front-end interview

1. Different variable declarations: const and let let means declaring a variable, and const means declaring a constant, both of which are block-level scopes. Variables declared by const will be regarded as constants, which means that its value cannot be modified after it is set. If const is an object, the value of the object can be modified, and the reference address cannot be changed 2.String template'' 3. Arrow function Arrow function is simply a function of the form, he does not need to creat

... Sophia
schedule 18 min read
programming

Exploitation plan monthly list Top authors list announced in April 2021

hi, friends, hello everyone~ The sixth issue of the monthly list of the digging plan is here~ This issue of the list announced the outstanding creators of the Nuggets community under the three categories of front-end, back-end, and mobile in April 2021, setting an example for the wider community of nuggets, and looking forward to the improvement of Nuggets in the technical field. Well, you can study more technology and output more high-quality content. While helping yourself and others to improv

... Levi
schedule 6 min read
programming

With WebRTC, live streaming can be played like this!

How to realize a real-time video call between two people? You may first think of the live broadcast method: Streaming -> Pushing -> Pulling. However, if you put this process on the front end, you can only see it on the rooftop. However, the emergence of WebRTC has reversed this status quo. With the help of WebRTC, the front end does not need to pay attention to the process of "collecting stream -> pushing stream -> pulling stream", and can easily realize live broadcast and even real-

... Summer
schedule 21 min read
programming

Advanced usage of llvm compiler: third-party library instrumentation

Number of characters: 3141 characters Estimated reading time: 25 minutes 1. Background Recently, I saw an interesting technical article: "Douyin R&D Practice: The APP startup speed of the solution based on binary file rearrangement increased by over 15%". At the end of the original text it is mentioned that the scheme cannot cover 100% of the symbols: The solution based on static scanning + runtime trace still has a few bottlenecks: initialize hook is not available Not part of the block hoo

... Riley
schedule 14 min read
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