Creation of objects

var New  = "Dang"=function()    {returnthis. name+ this. age+ ' running: ';} Alert (Box.run ());

Creating objects above requires a lot of code to create similar objects, such as when creating a Box2
Create a centralized instantiation method, Factory mode

functionCreateObject (name,age) {varobj =NewObject (); Obj.name=name; Obj.age=Age ; Obj.run=function(){        return  This. name+ This. age+ "in operation";    }; returnObj//Be sure to return the object};functionCreateObject2 (name,age) {varobj =NewObject (); Obj.name=name; Obj.age=Age ; Obj.run=function(){        return  This. name+ This. age+ "in operation";    }; returnObj//Be sure to return the object};varBox1 = CreateObject ("Lee", 100);varBox2 = CreateObject ("Jack", 200);varBox3 = CreateObject2 ("lll", 111);//is object, which is to identify the problem, because there is no way to figure out exactly which object they are an instance of. alert (Box1.run ()); alert (Box2.run ());

//constructor creation, solve the above recognition problem, you can find out exactly which object they are an instance offunctionBox (name,age) {//Not medicinal name     This. Name =name;  This. Age =Age ;  This. Run =function(){        return  This. name+ This. age+ "Yinxingzhong";  }; //semicolon to add}functionBox2 (name,age) { This. Name =name;  This. Age =Age ;  This. Run =function(){        return  This. name+ This. age+ "Yinxingzhong";  }; //semicolon to add}

1. The constructor does not have a new Object, but the background will automatically var obj = new Objeck ();
2. This is equivalent to obj
3. No return statement

1. The constructor is also a function, with the first letter capitalized
2. The new constructor must be instantiated

var New Box ("Lee", +); var New Box ("Jack", +); var New Box2 ("KK",instanceof box);  // true

Another: impersonating a call

// Object impersonating a call var New Object (); Box.call (O,"Lee", +); alert (O.run ());

Creation of objects