Javascriptは対象に向かってノートを学ぶ.

 1 //   (prototype   )

 2 function Cat(name,color) {

 3     this.name = name;

 4     this.color = color;

 5 }

 6 Cat.prototype.type = 'cat';

 7 Cat.prototype.food = 'fish';

 8 Cat.prototype.eat = function() {

 9     alert(this.name + ' is eating '+this.food);

10 };

11 

12 //  

13 var cat1 = new Cat('Jack','white');

14 var cat2 = new Cat('Rose','black');

15 alert(cat1.name + ' is a ' + cat1.color + ' ' + cat1.type);//Jack is a white cat

16 cat2.eat();//Rose is eating fish

17 

18 //===========================================

19 

20 //  (         )

21 function extend(Child, Parent) {

22     var F = function(){};

23 　　F.prototype = Parent.prototype;

24     Child.prototype = new F();

25     Child.prototype.constructor = Child;

26 }

27 //  

28 function Panda(name) {

29     this.name = name;

30     this.color = 'black&white';

31 　　this.food = 'bamboo';

32     this.size = 'fat';

33 }

34 extend(Panda, Cat);//Panda  Cat,        

35 

36 var panda1 = new Panda('Po');

37 alert(panda1.name + ' is a ' + panda1.color + ' ' + panda1.size + ' ' + panda1.type);//Po is a black&white fat cat

38 panda1.eat();//Po is eating bamboo

39 //=========================================

40 

41 //     

42 //p:parent c:child

43 function deepCopy (p ,c) {

44     var c = c || {};

45     for (var i in p) {

46         if(typeof p[i] === 'object') {

47             c[i] = (p[i].constructor === Array) ? [] : {};

48             deepCopy(p[i], c[i]);

49         } else {

50             c[i] = p[i];

51         }

52     }

53     return c;

54 }