object oriented javascript interview questions

, after which the prototype has completed initialization.Parasitic constructor mode:functionPerson (name, age) {varobj =NewObject ();//generate a Objdetde objectObj.name=name; Obj.age=Age ; Obj.sayname=Functon () {alert ( This. Name); } returnObj//returns an object that has always been a. }varPeople =NewPerson ("Yangxunwu", 24); The difference from the factory model, Pit people.sayname (); //YangxunwuThe returned

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 =

JavaScript programming has been around for a while, but there are still a lot of basic concepts that seem to be understandable. If you do not understand them, correct them. 1: function and Function Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Alert (function ); // Function function (){ // [Native code] // } Alert ( Typeof Function ); // Function Alert (Function

Despite the differences between object-oriented JavaScript and other languages, and this has caused some controversy, there is no doubt that JavaScript has powerful Object-Oriented Programming capabilities. This article first intr

(); T3.sayhi ();Obj3 inherits Obj2,obj2 inheritance Obj1. When our Obj3 instance object accesses Sayhi, we go to Obj3 's instance object and look for the Sayhi method (not found), then go to the OBJ3 prototype (not found), then go to the parent OBJ2 prototype (not found), and then go to the OBJ1 prototype (found). The path to finding is the prototype chain. This is a learning record, not a tutoria

JavaScript Object-Oriented Programming-object copy for quickly building inheritance relationshipsIn the preceding example, we create an object through the constructor and want the object to inherit from another constructor. We can

This article mainly introduces the inheritance of JavaScript based on object-oriented. For more information, see I. Face Object Inheritance Mechanism This example uses UML to explain the inheritance mechanism. The simplest way to explain the Inheritance Mechanism is to use a classic example of geometric shape. In fact,

in the previous example, we created the object through the constructor and wanted the object to inherit objects from another constructor.we can also directly target an object to achieve the purpose of inheritance, using subordinate steps:1. Copy an object 2. Adding attributes to new objects /** * Inherit properties a

What is an object?A. Abstraction of real things-object- oriented is the abstraction of real thingsB. Encapsulation of data-a package of specific data, a collection of properties and methodsThree major features of an object (encapsulation, inheritance, polymorphism)1. Encapsulation is the encapsulation of properties an

[Ctrl + A All SELECT Note: If the need to introduce external JS need to refresh to perform] JavaScript two-object-oriented writing methods and differences Http://www.jb51.net/article/13211.htm JavaScript Introduction to the object-orie