learn javascript book

I have been in touch with jQuery for a long time. I have too many questions about its implementation. I only know what it is, and I have no idea about its essence. Sadly! Therefore, it is necessary to study the principles. The Ancients "Teach fish, it is better to teach fish". Without a teacher, they can only learn "fish" by themselves. Let's start with something simple! The following code is the most familiar, but do you know why? Why is the jQuery o

The Ancients "Teach fish, it is better to teach fish". Without a teacher, they can only learn "fish" by themselves. Let's start with something simple! The following code is the most familiar, but do you know why? Why is the jQuery object introduced by adding the code to the page. Copy codeThe Code is as follows: (function ($ ){ // Function implementation code }) (JQuery ); I started from here! Programmers all know how to google and baidu. The same is

This writer is a member of the Peter Rybin,chrome developer tools team.In this article, we'll use Chrome's developer tools to learn two important concepts in JavaScript, "closures" and "internal properties."Closed Package The first thing to say is one of the most famous things in the closure (closure) –javascript. A closure is a function that uses an external var

The Ancients have "given the fish, as the award of the fishing", without teachers, they can only learn "fishing". Let's start with a simple one! The following code is the most familiar, but do you know why it's written? Why add this code to the page, the jquery object has been introduced. Copy Code code as follows: (function ($) { Implementation code for the function }) (JQuery); That's where I started! Programmers know how t

http://www.cnblogs.com/onepixel/p/5062456.html @ one PixelClosures, is an important concept in JavaScript, for beginners, closures are a particularly abstract concept, especially the ECMA specification to the definition, if there is no actual combat experience, you can not understand it from the definition. Therefore, this article does not have a large description of the concept of closures, directly on the dry goods, let you

Closures are a unique concept in JavaScript, and for beginners, closures are a particularly abstract concept, especially the definition given by the ECMA specification, and it is difficult to understand it from the definition without actual combat experience. Therefore, this article does not have a large description of the concept of closures, directly on the dry goods, let you learn to close the pack minut

Closures, is an important concept in JavaScript, for beginners, closures are a particularly abstract concept, especially the ECMA specification to the definition, if there is no actual combat experience, you can not understand it from the definition. Therefore, this article does not have a large description of the concept of closures, directly on the dry goods, let you learn to close the pack minutes!1 Clos

Original: Learn JavaScript from the beginning (c)--data typeFirst, classificationBasic data type: Undefined, null, string, Boolean, numberComplex data type: ObjectThe properties of object are defined in the form of unordered name and value pairs (name:value)Second, detailed1, undefined:undefined type has only one value: Undefined, when using VAR to declare a variable but uninitialized, the value of this var

memory, memory consumption is very large, so can not abuse closures, otherwise it will cause the performance of the Web page, in IE may cause memory leaks. The workaround is to remove all unused local variables before exiting the function.2) The closure changes the value of the inner variable of the parent function outside the parent function. So, if you use the parent function as an object, and the closure as its public method, and the internal variable as its private property (private value),

, memory consumption is very large, so can not abuse closures, otherwise it will cause the performance of the Web page, in IE may cause memory leaks. The workaround is to remove all unused local variables before exiting the function.2) The closure changes the value of the inner variable of the parent function outside the parent function. So, if you use the parent function as an object, and the closure as its public method, and the internal variable as its private property (private value), be car

JavaScript is my university to do website interest, plus a year to maintain the company's JavaScript-related framework.By the way, review your own methods and techniques for learning JavaScript and share them with your friends who need them.1, base base, Compatibility 2, Dom Dom Operation 3, Ajax Ajax principle 4, jquery implementation principle, tripartite Libra

using closures1) Because the closure will make the variables in the function are stored in memory, memory consumption is very large, so can not abuse closures, otherwise it will cause the performance of the Web page, in IE may cause memory leaks. The workaround is to delete all the local variables that are not used before exiting the function.2) The closure changes the value of the inner variable of the parent function outside the parent function. So, if you use the parent function as an object

. Therefore, we should pay attention to the scope of variables in the use of the packet function.*/function Calllocalvar () {var sayalertname = function () {alert (name)};var name = "Jacy";return sayalertname;}Calllocalvar () ();//Such a write will first run Calllocalvar and then run the returned Sayalertname;/*NoteSummary closure functions are able to access variables defined by the same domain, whether in front of or behind the closure function. Only if the same domain can be interviewed.*/fun

One, function callfunction is definitely the most important in JavaScript. In JavaScript, function assumes the functions of procedures, methods, constructors, and even classes and modules. In object-oriented programming, Functions,methods and class constructor are often three different things that are implemented by different grammars. But in JavaScript, these t

; This.color = color; } Cat.prototype.type = "cat family animal"; Cat.prototype.eat = function () {alert ("Eat Mouse")}; Then, the instance is generated. var cat1 = new Cat ("hairy", "yellow"); var cat2 = new Cat ("Er Mao", "Black"); alert (Cat1.type); Cat Cat1.eat ()//eating mice The type attribute and the Eat () method of all instances are in fact the same memory address, pointing to the prototype object, thus increasing the efficiency of the operation. Alert (cat1.

main 2 optimization: (1) Generational recycling (Generation GC) This is consistent with the idea of Java recycling strategy. The goal is to reduce the time consuming per GC by distinguishing between "temporary" and "persistent" objects, by recycling the "temporary objects" area (young Generation), by recycling less the persistent objects area (tenured generation), and by reducing the number of objects that need to be traversed each time. As shown in figure: Here's what you need to add: for

In JavaScript, there is no support for abstract classes and interfaces. JavaScript itself is also a weakly typed language. JavaScript does not have the ability or need to do more in terms of encapsulation types. For JavaScript design pattern implementations, the distinction between types is a pale, or a relief. From t

puzzle, like groovy to a DSL. I will record and discuss some of the language features, but will not discuss the likely important but trivial parts of most syntactic sugars. If it's just a pure study note that's boring, it's better to write it as a spit. I fought from Java and JavaScript to Haskell and groovy, and for these four languages, a feature is a feature-by-landscape comparison, such as standing at the angle of the type system, weak type, st

Closures, is an important concept in JavaScript, for beginners, closures are a particularly abstract concept, especially the ECMA specification to the definition, if there is no actual combat experience, you can not understand it from the definition. Therefore, this article does not have a large description of the concept of closures, directly on the dry goods, let you learn to close the pack minutes!1 Clos

Closures are a unique concept in JavaScript, and for beginners, closures are a particularly abstract concept, especially the definition given by the ECMA specification, and it is difficult to understand it from the definition without actual combat experience. Therefore, this article does not have a large description of the concept of closures, directly on the dry goods, let you learn to close the pack minut