JavaScript prototype mode (enumeration object's properties)

1. Understanding prototype ObjectsfunctionPerson () {} "Nicholas"; Person.prototype.age= 28; Person.prototype.job= "Software Engineer"; Person.prototype.sayName=function() {alert ( This. Name); }; varPerson1 =NewPerson (

Data structure and algorithm JavaScript description--Use of stacks

There are some issues that are especially suitable for stack resolution. This section describes several examples of this.1) Mutual conversion between the numbering unitA stack can be used to convert a number from one to another. The false idea is to

Simple understanding of prototype objects in JavaScript, implementing shared properties and behaviors between pairs

Constructors are provided in JavaScript. The object can be easily created.Typical constructors are as follows:function person (name, age) { = name;  This.age = age; This.say = function () {return + ', ' + this.age;;}You can

JavaScript 30 day Daily effect diagram

JavaScript 30 Day DailyOn GitHub saw a Javascript30-day challenge of the repo, designed to use pure JS to practice, not allow the use of any other libraries and frameworks, the challenge for 30 days, I will be here to reproduce the challenges and

A simple Example about privileged Methods in JavaScript

Douglas Crockford Classified the "class methods" in JavaScript into three types:Private,Privilegedand Public.Public MethodsThe obvious meaning:they can be accessed by the public.Private Methods' Meaning is also clear:they cannot is accessed by the

JavaScript Basics: Closures (closure)

(1)javascript variable characteristics: The function can read the global variables directly, but outside the function cannot read local variables inside the function.When declaring variables inside a function, be sure to use the var command. If not,

JavaScript array de-weight method

Array-heavy operations are often used in JavaScript project development. This is the way to use the JS array to heavy.Demo1:The first: JS array de-re-operation method is to use the traversal of the original array, using the array of indexof ()

The beauty and the chicken of JavaScript

--Summary from: The language of the JavaScript language has its beautiful place and its ribs. Avoid the dross of some language, can reduce the probability of the occurrence of the bug correspondingly.Beautiful Place:A function is a first-class

Scope of JavaScript

After reading a few books some understanding and own ideas.    scopes, the scope of the variables   declarations of variables before ES6   only VAR can declare variables to belong to a scope, and also only global scope and function scope. (variables

JavaScript notes 1

JavaScript is a literal-translation scripting language, which is a dynamic type, a weak type, a prototype-based language, and a built-in support type. Its interpreter, known as the JavaScript engine, is widely used as a scripting language for the

Handling JavaScript Special values correctly

The best way to determine whether a value can be used as a number is to use the Isfinite function because it will sift out nan and infinity (infinity means infinity). When the value exceeds the range represented by the floating-point number, it is

JavaScript Basics-higher-order functions (map and reduce)


1 //Higher order functions: a function can accept another function as a parameter, which is called a higher order function. 2 /*1*/3 functionF (x,y,f) {4 returnF (x) +f (y);5 }6 varSumabs=f ( -6,4,

Determine if the JavaScript object is null or the property is empty

First, the difference between null and undefined:Executes typeof on declared but uninitialized and undeclared variables, returning "undefined".Null represents an empty object pointer, and the typeof operation returns "Object".Generally do not

Implementation of JavaScript BASE64 algorithm

JS version Base 64 algorithm Base64.jsvarKeystr = "Abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789+/=";//BASE64 encoding an ANSI-encoded stringfunctionencode64 (input) {varOutput = "";varCHR1, CHR2, CHR3 = "";varENC1, Enc2, enc3, Enc4

JavaScript (2)

String, Array, Date, Math (first 4 can be read as long as the document is written), global functions, Overloads, BOM, DOM, document object1. js String ObjectCreate a String object var str = "ABC";Methods and propertiesProperty Length: String

Introduction to JavaScript

Introduction to JavaScriptJavaScript, a literal-translation scripting language, is a dynamic type, a weak type, a prototype-based language, a built-in support type. Its interpreter? Called JavaScript engine, is a part of the browser, widely used in

Learn JavaScript or think that learning is not solid "summary"

Today, I write this article, because of being asked questions, a lot of things although have been learned to read, but there is no real understanding??? In order to learn better, I wrote this summary, of course, this article is only a document. Just

mdn--javascript--Introduction--The second chapter--Summary of knowledge points

If ElseSwitchTernary operators(condition)? Run this Code:run this code insteadFor LoopBreak jumps out of the loopContinue jump out of the current loop and continue to the next loopFunctions: Reusing code blocksanonymous functions1 Binding with

ArcGIS API for JavaScript 4.4 Learning notes [new] AJS4.4 and AJS3.21 new features

The ESRI website silently updates 4.4 and 3.21, and the public number has no news. As usual, let's show you what's new in this update. 1. AJS 4.4Official update log: Point me, more detailed. I'm here to draw some trunk as a description.1.1

JavaScript naming--name cannot do variable names

Using name as the variable name (var name = ") does not cause a bug in IE (IE9), causes a bug in chrome but does not specify a naming error, but reports other errors, so it is not easy to find.In JavaScript, name is neither a reserved word nor a

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