javascript typeof class name

JavaScript as a weak type of speech, there is no similar to the concept of "class" in java,c#, but there are many times in the actual development of such requirements, there are now know that there are two ways to simulate.1. By declaring an object, you can have the following code:var people = { age:12, name: "Jack", Sex: "Male", setag

containing, and 30 Simple enough, now S is a 3-element stream:10, and 30; In a sequential order. We can use S.length () to look at the length of this stream, and use S.item (i) to retrieve an element from it by index. You can also get the first element of the stream by calling S.head (). Let's actually do the following: Copy Code code as follows: var s = stream.make (10, 20, 30); Console.log (S.length ()); Outputs 3 Console.log (S.head ()); Outputs 10 Console.log (S.item (

How to solve the problem of no parameters and parameter class inheritance in Javascript This article describes how to solve the problem of No-parameter and parameter-class inheritance in Javascript. This article explains the problem of non-parameter class inheritance and the

Before you do something, be clear about the benefits of doing it, and believe that no one is willing to do things for no reason at all. Generally speaking, when we are designing a class, in fact, you want to reduce the repetition of the code, the use of inheritance can be perfect to do this, with the inheritance mechanism, you can on the basis of existing classes again to design and make full use of the various methods they already have, and the desig

Previously discussed how to write in JavaScript. However, private implementations are not discussed. Look at this article. We know that the implementation of JS private property is the essence of Var + closure. As follows Copy Code code as follows: function person (n, a) { Public THIS.name = n; Private var age = A; This.getname = function () { return this.name; } This.getage = function () { return age; } }

JavaScript Data Validation Class/*JavaScript: Authentication class Author: Yang Bo date:201603231, User name authentication 2, password Authentication 3, repeat password verification 4, mailbox verification 5, mobile phone number verification 6, Verification code verificatio

Currently, javascript implementation inheritance is not implemented through the "extend" keyword, but through the constructor function and prototype attributes. First, create an animal class.Js CodeCopy codeThe Code is as follows:Var animal = function () {// This is the constructor function.This. name = 'pipi ';This. age = 10;This. height = 0;}// Create an animal instanceVar a1 = new animal (); The differen

processing and defining private variables, you can also use var to define private functions // private function Shape3 () {var draw = function () {// private function} this. draw2 = function () {// common functions that can be seen from the outside} var c = new Shape3 (); c. draw2 (); // use javascript to simulate OOP programming function Shape4 (ax, ay) {var x = 0; var y = 0; var init = function () {x = ax; y = ay;} init (); this. getX = function ()

This article describes the prototype attribute in JavaScript. This attribute is an important basis for understanding JavaScript classes and inheritance. We have used prototype property simulation class and inheritance implementation in Chapter 1. The prototype attribute is essentially a JavaScript Object. Each function

There are several ways to build a class in javascript: 1.Factory Mode Copy Code code as follows: function Createcar () { var car = new Object (); Car.color= "B"; car.length=1; Car.run=function () {alert ("Run");} return car; } Once you have defined such a function, you can use: var car1 = Createcar (); var car2 = Createcar (); To create a new object, the problem is that e

);}}// Set the validity periodThis. setExpire = function (sec ){Var oTimeNow = new Date ();OTimeNow. setSeconds (oTimeNow. getSeconds () + parseInt (sec ));Return oTimeNow. toUTCString ();}} Else // use globalStorage for client storage in non-IE Environments{Var domain = document. domain;// Obtain the specified property valueThis. getAtrib = function (filename, atrib ){Var oTimeNow = new Date ();Var etime = parseInt (window. globalStorage [domain] [filename + "_ expire"]);If (! Etime | etime {M

. Prototype This method uses the prototype attribute of the object to view it as the prototype on which the object is created. Here, we use an empty constructor to set the class name, and then all the attributes and methods are directly assigned to the prototype attribute. Rewrite the previous example. The Code is as follows: The Code is as follows: Function Car (){}Car. prototype. color = "red ";Ca

The object in JavaScript is the base class for all objects in JS, meaning that all objects in JS are derived from object objects. Object objects are used primarily to encapsulate arbitrary data into an object form. Introduction of Object class The object class is the base class