原文来自阮一峰日志(http://www.ruanyifeng.com/blog/2010/05/object-oriented_javascript_inheritance_continued.html),记录一下非构造函数继承方式。
1、object()方法
function object(o) {
function F() {};
F.prototype = o;
return new F();
}
var Chinese = {
nation:'中国'
};
var Doctor ={
career:'医生'
}
var Doctor = object(Chinese);
Doctor.career = '医生';
2、浅拷贝
function extendCopy(p) {
var c = {};
for (var i in p) {
c[i] = p[i];
}
c.uber = p;
return c;
}
var Doctor = extendCopy(Chinese);
Doctor.career = '医生';
alert(Doctor.nation); // 中国
3、深拷贝
function deepCopy(p, c) {
var c = c || {};
for (var i in p) {
if (typeof p[i] === 'object') {
c[i] = (p[i].constructor === Array) ? [] : {};
deepCopy(p[i], c[i]);
} else {
c[i] = p[i];
}
}
return c;
}
var Doctor = deepCopy(Chinese);