functional继承模式 摘自javascript:the good parts-javascript

var person = function(cfg) {
var that = {};
that.getName = function() {
return cfg.name || 'unknow name';
};
// 性别 默认男性
that.getGender = function() {
return cfg.gender || 'male';
};
return that;
};
var programmer = function(cfg) {
var that = person(cfg),
share = {};
share.status = 'normal';
that.getFamiliarLanguage = function() {
return (cfg.langs || []).join(' ');
};
that.getProfile = function() {
return 'hi,my name is ' + that.getName();
};
that.getStatus = function() {
return share.status;
};
that.setStatus = function(status) {
share.status = status;
};
return that;
};
var me = programmer({
name: 'AndyZhang',
gender: 'male',
// 熟悉的语言
langs: ['javascript', 'java', 'php']
});
console.debug(me.getFamiliarLanguage());
console.debug(me.getProfile());
me.setStatus('oh really busy..');
console.debug(me.getStatus());

// 这里方法名的首字母大写 以表示作为一个构造方法 用new来调用
var Person = function(cfg) {
this.name = cfg.name;
this.gender = cfg.gender;
}
// new出一个person1
var person1 = new Person({
name: 'Andrew',
gender: 'male'
});
// 本来是想让name, gender成为私有 用类似setter getter方法来读写 就像javaBean一样
alert(person1.name); // 'Andrew'
alert(person1.gender); // 'male'