what variable declaration

Topic One:If(! ( "A"in window){var=1;} Alert(a); Topic Two:var=1,=function a(x){&& a(---x) ; }; Alert(a); Topic Three:function a(x){return*2;} var a; Alert(a); Topic Four:function b(x, y, a) { arguments[2] =

Among all the key knowledge that must be mastered in JavaScript, functions are a key point that we can easily ignore when learning. In the course of learning, there may be many people and many articles that tell you that object-oriented is very

Do you have all the top ten hot javascript pen questions in 2015? 1. Evaluate the knowledge of this  var length = 10;  function fn() {    console.log(this.length);  }    var obj = {    length: 5,    method: function(fn) {      

You're going to go home and farm. Copy Code code as follows: Delete Thisisobject[key] Or Delete Thisisobject.key By the way, we'll talk about the use of delete. A few weeks ago, I had a chance to read Stoyan Stefanov's

Variables | specification Original: "C # Version 3.0 Specification", MicrosoftTranslation: Lover_pIn a local variable declaration with an implicit type (implicitly typed local variable declaration), the type of the declared localized variable is

In this article, I'll delve into the most basic part of JavaScript-the execution context (execution). After reading this article, you should be aware of what the interpreter does, why the functions and variables can be used before the declaration,

Original: http://www.nczonline.net/blog/2010/01/26/answering-baranovskiys-javascript-quiz/--------------------------------------------------------------------------------------------------------------- ------------------------------------------------

Now, the reader must be eager to write programs to allow actual interaction between the computer and the outside world. We do not want the program to only work as a typist and display fixed information contained in the program code. Indeed, the

You do not know the execution context of JavaScript -- Item19 (execution context) In this article, I will go into the execution context, the most basic part of JavaScript ). After reading this article, you should understand what the interpreter has

Do you know the value of alert following JavaScript execution? var foo = 1; function Bar () { if (!foo) { var foo =; alert (foo); } Bar (); If you're surprised by the result of "10," you might want to take a good look at this article: var a =

Sometimes, for a class, it is very useful to keep track of the number of instances it creates, and its typical implementation is done by incrementing its constructor by a private static domain. In the following program, the creature class

This is a creation in Article, where the information may have evolved or changed. 1. Block The block is a pair of curly braces that enclose the declaration and statement. Block = "{" {statement ";"} "}". In addition to the explicit source block,

Detailed description of the pre-Compilation Principle and JavaScript Compilation Principle in javascript Principle of JavaScript pre-Compilation Today, I spent a lot of time reviewing the scope, pre-compilation, and other knowledge. I read a lot of

As we know, when we write the JS program, open the browser, our code can start to run (sure your code is not a problem, to follow your expectations). Just said is JS execution of a large environment, today we learn, JS in the parser in a process of

This year fragmented read a few JavaScript books, look back to read the previous JavaScript learning notes, it is a bit embarrassing, highlighting the "superficial" two words, but the deeper the more profound the more and more deep, a kind of

Today, I spent a lot of time reviewing scopes, precompilation, and so on.Looked very Doboven, turned over once read the book (as if many books did not say pre-compilation)found that they have learned very clearly, in fact, there are some mistaken

As we know, when we write the JS program, open the browser, our code can start to run (of course, to ensure that your code is not a problem, in order to do as you expected). Just said is JS implementation of a large environment, today we learn, JS

Confusing builder case The constructor is easy to confuse during the learning process, and the following code now gives you two easily confusing constructors. The main method calls a constructor, but which one does it call? The output of the

In this article, I'll delve deeper into the most basic parts of JavaScript-the execution context (execution contexts). After reading this article, you should be aware of what the interpreter did, why the functions and variables can be used before

Today, I spent a lot of time reviewing scopes, precompiling, and so on.Read a lot of posts, opened the previous read the bookfound that they have learned very clearly, in fact, there are some misconceptions of thinkingI'm going to tidy up some messy