Programmer Group

TypeScript is a superset of JavaScript and supports ECMAScript 6 standard( ES6 tutorial ). TypeScript is a free and open source programming language developed by Microsoft. TypeScript is designed to develop large-scale applications. It can be compiled into pure JavaScript, and the compiled JavaScript can run on any browser. TypeScript is a la ...

1. Overview and classification of code blocks 1. Code block overview      In Java, code enclosed with {} is called a code block. 2. Code block classification      According to its location and declaration, it can be divided into local code block, construction code block, static code block and synchronous code b ...

Hello, everyone. I'm the third. I'm glad to meet you again. It's cool recently. Please keep warm. This section shares the Java thread pool. Next, let's dig up the thread pool step by step. Introduction: old three withdraw money There is a programmer whose name is Lao San. The third man had no money in his pocket and hurried to do banking busine ...

1. Quick template. The template of fast power should be familiar to you. I always remember the template directly before. Today, let's explain the meaning of fast power template in detail. The template without taking the mold is as follows: (modify the mold by yourself) ll fp(ll a,ll b){ ll ans=1; ll base=a; while(b!=0){ if(b&1!=0) ...

preface This article mainly explains the classic usage scenarios of Zookeeper, the use of Zookeeper native client and Apache cursor open source client, and the configuration of Zookeeper cluster. Zookeeper mainly includes: Distributed configuration centerDistributed registryDistributed lockDistributed queueCluster electionDistributed ba ...

catalogueYarn capacity scheduler multi queue submission casedemandConfigure capacity scheduler for multiple queues1. Modify the following configurationUpload and download of SecureCRT2 upload to the cluster and distribute3 restart Yarn or yarn rmadmin -refreshQueues4 submit tasks to Hive queueSubmission method - jar packageTask priorityUse of t ...

Array sorting algorithm Algorithm = data structure + program code 1. Sorting: Suppose that the sequence containing n records is {R1, R2,... Rn}, and the corresponding keyword sequence is {K1, K2,..., Kn}. Reorder these records to {Ri1,Ri2,... Rin}, so that the corresponding keyword values meet the requirements of Ki1 < = ki2 < =... < ...

1, Theoretical learning Learn the reference material "prediction of house prices by multiple linear regression model. ipynb", and re do the multiple linear regression (based on the statistical analysis library statsmodes) for the house data set "house_prices.csv"; It also focuses on understanding biased data, preprocessing ...

                                                                                      fixture - scope in interface automation - py ...

1, MySQL database MySQL database notes 2, mongodb database 1, Introduction to mongodb Non relational database is a document structure, json (Dictionary Plus list), which stores large dataImmune to sql injection statement attacks. The simplest database.There are multiple libraries in mongodb. There are multiple collections in the library, an ...