Programmer Group

recursion The concept of recursion Recursion is a method to solve a problem. It starts from solving each small part of the problem to solving the initial big problem. Recursion usually involves calling the function itself, directly calling itself, or indirectly calling itself, which are recursive functions. Like this: // Call itself directl ...

I. Build projects and install plug-ins # Install vue-cli npm install vue-cli -g # Initialize project vue init webpack china-map # Cut into Catalog cd china-map # Installation Project Dependency npm install # Install vuex npm install vuex --save # Install axios npm install axios --save # Install ECharts npm install echarts --save II. Pr ...

jwt login registration jwt concept Token does not need to be stored in the database.Just generate the key behind the scenes, then put the token in the request body or header when the client sends the request. When the client receives the token, it is stored in the local store or cookie. Note that sensitive information cannot be stored in the to ...

Recently, we need to do reconstruction and optimization of react project. Because we haven't touched react for a long time, today we simply optimize a keyword search based demo, which is recorded below. It is optimized from three aspects: Reduce the frequency of triggering events - debounce keyword typing Reduce HTTP requests - cache block dup ...

I wrote an article a few years ago - " My Opinions on the Differences between Jquery ajax, Axios, Fetch "- Analyses the differences between ajax,axios and fetch in terms of principle and usage.Now, starting with a small ex amp le, this paper uses react hook to dissect a new way of requesting data; and through this custom HOOK, it intr ...

Let's see a wave of renderings   Initialize project 1. Installed on node.js Using the following command npm install --g vue-cli 2. Under the directory where the project will be built Vue init webpack myproject (project directory name) All the way back here In the middle, you can select ESLint to check the code style of the project. ...

Purpose of improving code quality Programming apes do their job of writing code. Writing high-quality code should be our pursuit and our own requirement because: High quality code often means fewer BUG s, better modularity, and is the basis for our scalability and reusability High quality code also means better writing, better naming, ...

Some commonly used functional functions About native JS File size unit conversion /** * @desc bytesToSize Byte unit conversion * @param bytes Incoming data in bit */ const bytesToSize = function (bytes) { const k = 1024; if (!bytes || bytes === 0) return '0 B'; if (typeof (bytes) == 'string') { return bytes } else { ...

I wrote an article a while ago Implementation of mock data mode in front-end vue project In this paper, we mainly use mock data in vue project. The data and project are coupled together, which is not elegant. As a front-end with pursuit, how can we tolerate this method? In this article, we record the method of using koa2 to build the server and ...

1, Simple entry level tree menu implementation (pure background logic) 1. Introduction (1) Development environment　　IDEA + JDK1.8 + mysql 1.8　　SpringBoot 2.2.6 + mybatis-plusHere, it is only developed in the background (json data is returned), which will be explained in the subsequent presentation of the front page. (2) Data sheetAs follows ...