1 if (
typeof Object.beget !== 'function'
) {
2 Object.beget =
function(o) {
3 var F =
function() {};
4 F.prototype =
o;
5 return new F();
6 };
7 }
8
9 var myMammal =
{
10 name: 'Herb the Mammal'
,
11 get_name:
function() {
12 return this.name;
13 },
14 says:
function() {
15 return this.saying || ''
;
16 }
17 };
18
19 var myCat =
Object.beget(myMammal);
20 myCat.name = 'Henrietta'
;
21 myCat.saying = 'meow'
;
22 myCat.purr =
function(n) {
23 var i, s = ''
;
24 for (i = 0; i < n; i += 1
) {
25 if (s) {
26 s += '-'
;
27 }
28 s += 'r'
;
29 }
30 return s;
31 };
32 myCat.get_name =
function() {
33 return this.says + ' ' +
this.name + ' ' +
this.says;
34 };
转载于:https://www.cnblogs.com/qzsonline/archive/2012/07/12/2588835.html
