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Course Elementary 13053

Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.

CSS Online Manual

Course Elementary 81531

Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).

SVG Tutorial

Course Elementary 12624

Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.

AngularJS Chinese Reference Manual

Course Elementary 24069

Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.

Go language tutorial manual

Course Elementary 26834

Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.

More courses

javascript - instanceof operator

https://www.ibm.com/developer... According to this article, instanceof can use the following code to simulate {code...} but var a=1; instance_of(a,Object) is truea instanceof Object returns false, which Why?

2017-05-19 10:26:43

javascript - Difference between Boolean object and basic type Boolean

var a=new Boolean(false);var b=false;alert(a instanceof Boolean);alert(b instanceof Boolean);The first pops up true and the second pops up false.Why? I don’t quite understand.

2017-07-05 10:56:40

I don't understand the meaning of judging whether it is a static instance? ?

One ($instance =null;) has been defined above and the judgment (self::$instance instanceof self) is definitely (false). Why do we still need to judge? Wouldn’t it be enough to directly assign the current object instance to (self::$instance) and then return the value? self::$instance =new self($sitename);return self::$instance;

2019-05-16 12:43:53

javascript - A piece of code about iscroll, I hope someone can explain it

The purpose of if (el instanceof SVGElement) here should be a capability test, but I found that for the incoming element el, whether there is SVGElement on its prototype chain does not seem to have anything to do with whether it has getBoundingClientRect, right? Even if an element does not have an SVGEl on its prototype chain...

2017-05-16 13:34:55

Team collaboration - What should I do if someone needs the feature I wrote as a dependency in git flow?

For example, I am developing the feature/user user management module to provide the user's name, information, etc., and my colleague is developing the feature/login login system. He needs my user module to detect whether the user can log in, obtain user information, etc. Question 1: Assuming I've done the user system...

2017-05-02 09:28:14

MoreQ&A

Why Does `instanceof` Return `false` for Literals in JavaScript?

Course Introduction：The Mystery of Instanceof and LiteralsWhy does the instanceof operator return false for some literals?In JavaScript, the instanceof operator...

2024-11-03 comment 0 854

Does instanceof Impact Java Application Performance?

Course Introduction：Impact of instanceof on Java Application PerformanceThe instanceof operator is commonly used in object-oriented programming to determine the type...

2024-11-09 comment 0 740

`instanceof` vs. `Class.isAssignableFrom()`: When Should You Use Each?

Course Introduction：Instanceof versus Class.isAssignableFrom:Understandably, you are curious about the distinction between 'a instanceof B' and...

2024-11-29 comment 0 904

Why Does `instanceof` Behave Differently for Primitives in JavaScript?

Course Introduction：Instances and Primitives in JavaScript: Understanding instanceof AnomaliesJavaScript's instanceof operator returns true if an...

2024-11-02 comment 0 450

Why Does `instanceof` Behave Unexpectedly with Literals in JavaScript?

Course Introduction：Type Analysis Conundrum: Why instanceof Behaves Unexpectedly for LiteralsInitiating the InvestigationJavaScript's instanceof operator, ostensibly...

2024-11-02 comment 0 1111

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