javascript reference book

. Because the linked list has more complex reference operations, it can be used to evaluate the understanding of Javascript references. With simple test cases:Copy codeThe Code is as follows:/* Test whether the dcatenate and sublist functions are correct */Function test (){Var A = IntList. list ([4, 6, 7, 3, 8]),B = IntList. list ([3, 2, 5, 9]);Dcatenate (A, B );If (A. toString () = "[4 6 7 3 8 3 2 5 9]") {

Reference | objects | Array useragent user and proxy header text sent by client to server Method javaenabled JavaScript does not currently have this method, but will soon add that it will see if the browser is compatible with JavaScript, and if so, continue to see if JavaScript is supported. b.22 Options Array The

Description of reference types of basic javascript data types and value types I. Basic Data Types In javascript, the keywords used to declare variables are var. This is different from other programming languages, but javascript also contains five basic data types (simple data types ), they are: Undefined, Null, Boolean

Code Listing 1:var a=3.14;var b=a;a=4;alert (b);Code 2var a=[1,2,3];var b=a;a[0]=99;alert (b);Why does code 1 show 3.14, why does the value of a not change? Obviously, after executing the second line of code, we re-assigned a value. Is it because the value of the first row given to a is an underlying type that cannot be changed?That's why code 2 shows the value is 99,2,3, why the value of a is changed, because the array is a reference type, the

This article mainly introduces the use of Requirejs to optimize JavaScript reference code, REQUIREJS is a popular JS library, the need for friends can refer to the Requirejs is an effective way to improve the speed and quality of your JavaScript code, and it also makes your code easier to read and maintain. In this article, I'll introduce you to Requirejs and h

JavaScript basic Data type:JS basic data types include: Undefined,null,number,boolean,string. The base data type is accessed by value, which means that we can manipulate the actual values that are saved in the variable.　　1. The value of the base data type is immutableNo method can change the value of a primitive type, such as a string:var name = "Change"; Name.substr ();//hangconsole.log (name);//changevar s = "Hello"; s.touppercase ()//hello; Console

First, let's take a look at a javascript interview question.Source code(I made a small change). This example is used to understand the reference type in JavaScript. Then we made a preliminary study on the objects in JavaScript. 1:VaR A = {X: 1 }; 2:VaR test = function (OBJ) 3:{ 4:OBJ. x = 2; 5:Console. Log ("

In the traditional sense, the JavaScript function is thought to pass the reference pass (also known as the Pointer Pass), and some people think that the value transfer and the reference pass have. So JS parameter transmission in the end is how it? In fact, the following demo is also fully available for Java First comes a relatively simple, basic type of delivery

In JavaScript, the method often involves the context, that is, this, so often can not directly reference, take the most common console.log ("info ..."), avoid writing lengthy console, directly with the log ("info ...") instead, Think of the following syntax without hesitation:1 var log = console.log; 2 log ("info ...");Unfortunately, the operation error: Typeerror:illegal invocation.Why is it? For Console.l

JavaScript reference Javascript uses "Object-Oriented Programming" or "Object-Oriented Programming. The so-called "Object-Oriented Programming" refers to dividing the scope of javascript into large and small objects. objects are still divided into objects until they are very detailed. All programming is based on object

JavaScript Reference Tutorials JavaScript is used as "object-oriented programming" or "object-oriented programming." The so-called "object-oriented programming", meaning that JavaScript can be involved in the scope of the division into large and small objects, objects continue to divide the object until very detailed,

javascript| Reference | Tutorial JavaScript is used as "object-oriented programming" or "object-oriented programming." The so-called "object-oriented programming", meaning that JavaScript can be involved in the scope of the division into large and small objects, objects continue to divide the object until very detailed

. These statements may contain "return" statements. When a function is executed, a return statement is encountered, and the function stops executing immediately and returns to the program that called it. If the "return" is followed by a Inside the function, parameters can be used directly as variables, and variables can be created with the Var statement, but these variables cannot be called by procedures outside the function. To make the information inside the function be called externally, eith

This article follows the reference type (top) of JavaScript advanced programming, and continues below:Date typeDate is a date class that can be used to get the date and time and the number of milliseconds for the specified date. The date class provides a rich API that can be understood through the documentation on the MDN: Click here to jump to MDN, which is not explained in detail here.RegExp typeRegular e

Use RequireJS to optimize the JavaScript reference code method, and requirejs to optimize RequireJS is an effective way to improve the speed and quality of your javascript code. It also makes your code easier to read and maintain. In this article, I will introduce you to RequireJS and how to use it. We discuss introduction of files and definition modules, and eve

OldNode.These are the methods and properties of the nodes in the DOM, because they are commonly used, remember!5. In DOM programming, an HTML document is treated as a DOM tree, and the DOM maps all HTML elements into node nodes. So we can use node nodes (objects)Properties and nodes. The properties and methods of 6.document+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++2012-04-20 16:07 2546 People read review (0) Favorite ReportDoc

varfn =function(){};6 varn =NULL;7 varobj = {};8 vararr = [];Ten typeofStr//"string" One typeofNum//"Number" A typeofBoo//"Boolean" - typeofU//"undefined" - typeofFn//"function" the typeofN//"Object" - typeofObj//"Object" - typeofArr//"Object"It is not difficult to see from the above example that the TypeOf operator is the best tool for determining whether a variable is a string, Boolean, numeric, or undefined. However, if the value of the variable is an object or null, the TypeOf operator retu

key of a keyboard is pressed 1 4 3 onkeypress Key of a keyboard is pressed or pressed 1 4 3 OnKeyUp The key of a keyboard is loosened 1 4 3 OnLoad A page or image is finished loading 1 2 3 OnMouseDown A mouse button is pressed 1 4 4 OnMouseMove Mouse is moved 1 6 3 onmouseout The mouse moves aw

Tutorial: http://javascript.ruanyifeng.com/Basic syntax-functions1. Promotion of Function nameThe JavaScript engine takes the function name as the variable name, and when the function is declared, the entire function is promoted to the head of the code. The following code will not error.f ();function f () {}However, using an assignment statement to define a function, JavaScript will give an error.f ();var f

As in the following example: Copy Code code as follows: var TestVar = { A: { Test:1 } }, Test1 = {}, Test2 = {}; test1.a = TESTVAR.A; test2.a = TESTVAR.A; /* Delete test1.a; Console.log (test1.a); Undefined Console.log (test2.a); Object {test:1} Console.log (TESTVAR.A); Object {test:1} */ Delete Testvar.a; Console.log (test1.a); Object {test:1} Console.log (test2.a); Object {test:1} Console.log (TESTVAR.A); Undefined As you can see from the test, the deleted