codecademy review

; default: do some default stuff}*/switch (true) { case90: console.log(‘优‘); break; case70: console.log(‘良‘); break; default: console.log(‘差‘);}ForUse conditional judgment to control the loop to handle certain things./*for (A;B;C) { do some stuff}其中 A 为初始化的内容，B 为循环的判断条件，C 为每次循环执行后会执行的代码*/for (var010; i++) { console.log(i);}WhileUse conditional judgment to control the loop to handle certain things./*while (Condition) do some stuff}Con

commonly used in 18.python for sequence operations? Please list several and explain its role92. Please briefly describe the adorner and briefly describe the application scenarioV. Object-oriented Python-related88. What is the open-closed principle89. What is the difference between object-oriented and process-oriented?90. What is the object-oriented 3 major feature?5.python is a complete object-oriented language, why?91.python What is the difference between a static method and a class method in

ObjectiveRecent learning process, do not know what kind of thinking divergent, and suddenly met the Queen problem, and then the same cliché, the mind pondering, although the idea of everyone is easy to understand, even the simplest savage backtracking method, said simple, but if you have to code to achieve? Can I write out the code of OK at once? I questioned this, so I wrote the code, found that writing this kind of algorithm problem, the most important is the boundary condition judgment. Here,

Basic Review of Javascript (1) type, review of javascript This is the last article in the expression series from simple to deep, but recently the team has been busy and never been busy! However, if you like expressions, please rest assured that some basic principles of Javascript are common in your work, so I decided to spend some time organizing the basic knowledge and sharing it with you. I was planning t

Simple Layer-3 Review, layer-3 Review I haven't reviewed it for a long time. I learned it before. If I don't review it, I will forget it. So I should review more and learn more! Not to mention nonsense. Start ~~~~ First, the database script: USE [DB_MyStudentLife]GO/****** Object: Table [dbo].[MyClass] Script Date:

Common Reasons for Apple's Emergency review channel and Apple's review Channel 1. we have a product launch in the coming days. considering that it's a media event and we can't afford any risk about this, we put great effort to improve the APP's quality at each aspects. for example, we replaced the old payment channel, fixed some system errors, added more tips... all the things we done is to optimize the use

Computer Network review, computer network review materials During the interview, if the interviewer wants to examine how your computer network has learned, how can he ask about the TCP three-way handshake process? So, I started to review the computer network in October April 24. I had to review the computer network fo

Database review 5-security and database review securityDatabase review CH7 Security 7.1 database security Introduction If integrity is a database protection measure for authorized users, security is a database protection measure for unauthorized users. Security issues involve many layers. illegal users can steal or tamper with databases from the following layers:

Web page Production WEBJX article introduction: the design of the product review of the electric business. A few days ago in the Robin club to share the design of the product reviews, feel that the addiction, here blog record. Before we start the product analysis and comparison, let's take a look at the two-piece product shapes that are currently impacting on detailed page reviews, One is the information interaction ancestor : BBS, forum.

Basic Review of MYSQL and JDBC (I), basic review of mysqljdbc 1. Basic Database review: 1.1 What is a database? In essence, it is a file system. You can use SQL to add, delete, modify, and view data in the database. 1.2 common databases: MYSQL is commonly used in web and small and medium-sized enterprises. It is an open-source free and small-sized database that i

Database review 8 -- concurrency, database review 8Database review CH15 concurrency 15.1 concurrency issues The I (Isolation, independent) of the ACID nature of the transaction, and the concurrent transactions are transparent. The interspersed transactions will produce multiple data inconsistency problems (different from the Database Inconsistency State ): Lost