object oriented javascript book

1. ObjectObjects are one of the basic concepts of object-oriented programming. You only need to look at this name and you will know it. In our familiar object-oriented languages, such as Java or C ++, there are similar object definition methods. For example, we want to defin

NEW: string equality comparisons in JavaScript The application of the image object is quite extensive, it appears in the desktop programming very early, the application is more mature, like c++,java,c# etc. And in the Web programming this piece, appear much later, so that the current web development is difficult, of course, there are many technologies involved in web development reasons. In recent years,

Recently, I was looking at the JavaScript advanced programming design (the third edition). The object-oriented chapter has more than 20 pages, and I went back and forth for three or five times. The results of each reading were different. The first time I went over it, I was confused, as a result, when I went to bed at night, I found a lot of problems and I couldn

This time we delve into JavaScript object-oriented technology, and before we learn, we need to explain some of the object-oriented terminology. This is the common denominator that all face object language has. There are several

console.info (p2 instanceof Person); // displayed on the console: true In addition, we can also use the constructor keyword to check whether the object's constructor is of the Person type: Console.info (p1.constructor = Person); // displayed on the console: true console.info (p2.constructor = Person); // displayed on the console: true You can also print out the constructors p1 and p2 for comparison: console.info(p1.constructor);console.info(p2.constructor); The problem caused by using the cons

Today's JavaScript is a great way to rely on a variety of applications that are deeply dependent on the day. Web programmers have become accustomed to using a variety of good JavaScript frameworks to quickly develop WEB applications, ignoring the learning and understanding of native JavaScript. So, often the case is that many of the programmers who have done for

JavaScript is widely used today, and various applications depend on it daily. Web programmers have gradually become accustomed to using a variety of excellent JavaScript frameworks to quickly develop Web applications, thus ignoring the learning and in-depth understanding of native JavaScript. Therefore, it is often the case that many programmers who have develope

() {Alert"Hi! I am "+ This. name); }varPerson1 =NewCreateperson (' ZS ',' Boy ',' 2001-02-03 ');varPerson2 =NewCreateperson (' ls ',' Boy ',' 2001-02-04 '); Person1.sayhi ();//outputs "Hi! I am ZS "Person2.sayhi ();//outputs "Hi! I am LS "In general, an object or class is more than one method and requires multiple methods to work with it.CreatePerson.prototype={ sayHi:function() { alert("Hi ! I am "+this.name); }, walk:function() {

JavaScript object-oriented (2) and javascriptConstructor and prototype object Constructor is also a function.newA difference between a function called when an object is created and a common function is that the first letter of the function should be capitalized. However, if

private members as privileged methods is the key to solving this problem. However, this access also has some drawbacks. For example, if you want to create a copy of the privileged method for each instance, more memory is required. We continue to optimize and use static members to solve the problems we face. By the way, static members only belong to the class, and all objects share only one copy (which is described in "Object-

1. The object Object is one of the basic concepts of object-oriented programming, just look at the name and know it. In our familiar object-oriented language, such as Java or C + +, there are similar

. In JavaScript, The instanceof operator can verify this Point: P1 instanceof Point P2 instanceof Point However, Point is not the only type of p1 and p2, because p1 and p2 are both objects, so Obejct is also their type, because Object is a more generalized class than Point, so we say, there is a derivative relationship between Obejct and Point. We will know later that this relationship is called "inheritanc

Object is a more generalized class than Point, so we say, there is a derivative relationship between Obejct and Point. We will know later that this relationship is called "inheritance" and it is also a special case of the generalized relationship between objects, it is an indispensable basic relationship in object-oriented systems.In the

() {} person. Prototype. Name = "Nicolas" ; Proson. Prototype. Age = 29 ; Person. Prototype. sayname = Function () {Alert ( This . Name );} VaR Person1 = New Person (); person1.sayname (); // "Nicolas" VaR Person2 = New Person (); person2.sayname (); // "Nicolas" Alert (person1.sayname = Person2.sayname ); // True We add the sayname () method and all attributes directly to the prototype attribute of person, and the constructor becomes an empty function. Even so, we can still call

ObjectiveToday's JavaScript is a great way to rely on a wide range of applications. Web programmers have become accustomed to using a variety of excellent JavaScript frameworks to quickly develop WEB applications, ignoring the learning and deep understanding of native JavaScript. So, often the case is that many of the programmers who have done it for many years a

This article mainly introduces the advanced features of javascript object-oriented programming, and detailed the creation, access, deletion, object type, extension, and so on of javascript objects in the form of examples, for more information about the advanced features of

Object is a more generalized class than Point, so we say, there is a derivative relationship between Obejct and Point. We will know later that this relationship is called "inheritance" and it is also a special case of the generalized relationship between objects, it is an indispensable basic relationship in object-oriented systems.In the

(subclass, superclass) {varPrototype =object.create (superclass); Subclass.prototype=prototype; Subclass.constructor=Subclass;} Extend (B, A); B.prototype.getpoint=function () { return' I am a subclass ';}varb =NewB (1, 2); B.getpoint ();Output result: I am a subclassAfter the above code has been executed, the structure of function BClass B When instantiated, the Class B object will have an internal attribute pointing to B.prototype. When the instan

Javascript importanceUsage1. In web applications, javascript is used in front-end interface programming;2. Web2.0 and Ajax promote the javascript language.3. As a large number of c/s applications turn to B/s, the rich client technology will be continuously promoted, and the application scope of javascript language will

Then, prototype can be used to dynamically enhance the object, then some JS primitive class, do not provide the function we want, we can use prototype to enhance it.Here are some specific cases, I hope you can extrapolate:Tail to Empty string.prototype.trim=function () {return this.replace (/^\s+|\s+$/igm, ');}; Alert ("' abc ' length = = =" + ' ABC ');//measure the length of the empty after the alert ("' ABC ' to empty after the length =