我的类库功能预览 ruby风格的继承机制

创建一个新类，使用dom.factory方法，很明显它是一个工厂方法，批量生产各种各式的类。

      var MyFirstClass = dom.factory({
        message: "hello world",
        sayHello: function() {
          alert(this.message);
        }
      });
      var obj = new MyFirstClass();
      obj.sayHello();//hello world

继承:

      var Animal = dom.factory({
        init: function(name) {
          this.name = name;
        },
        eat: function() {
          alert('yummie');
        }
      });

      var Human = dom.factory({
        inherit: Animal,
        speak: function() {
          alert(this.name + ' said bla bla bla');
        }
      });

      var peter = new Human('peter');
      peter.eat();//yummie
      peter.speak();//peter said bla bla bla

      var Pat = dom.factory({
        inherit: Human,//注意这里，使用inherit方法
        init: function(name,age) {
          this.age = age
        }
      });

      var pat = new Pat('pat',18);
      alert(pat.name)//pat
      alert(pat.age)//18
      pat.speak();//pat said bla bla bla

方法链。就是在当前方法调用其父类的同名方法。

     var Girl = dom.factory({
        sayHello: function() {
          return "Hello there";
        }
      });

      var FancyGirl = dom.factory( {
        inherit:Girl,
        sayHello: function() {
          return "Well, "+ this.$super() +"!";
        }
      });
      var g = new Girl;
      alert(g.sayHello());
      var f = new FancyGirl;
      alert(f.sayHello());

内部方法：

       dom.require("lang");
      dom.require("oop")

      var Person = dom.oop({
        init: function(name){
          this.name = name;
        },
        secret: function(){
          return 'I sometimes like girly drinks';
        }.protect(),  //定义其为内部方法，只能内部调用

        describe: function(){
          return "Hi, I'm #{name}. #{secret}. I kid, I kid.".instead({
            name: this.name,
            secret: this.secret()
          });
        }
      });

      var scott = new Person('司徒正美');
      // alert(scott.secret());//报错 The method "secret" cannot be called.
      alert(scott.describe());//Hi, I'm Scott. I sometimes like girly drinks. I kid, I kid.

singleton，标识生产的新类为单例类：

      var God = dom.factory({
        init:function(name){
          this.name = name;
          this.alertName = function(){
            alert(this.name)
          }
        },
        singleton:true//注意这里，使用singleton属性
      });
      var god = new God("耶和华");
      god.alertName();      //alerts 耶和华
      var lucifer = new God("撒旦");
      lucifer.alertName();   //alerts 耶和华
      alert(god === lucifer )//alerts true

alias，别名机制：

      var Array2 = dom.factory({
        init:function(){
          var args = [].slice.call(arguments);
          this.setArray(args);
        },
        setArray: function (arr) { //把普通对象变成类数组对象，
          this.length = 0;        //必须要让它成为原型方法才可以使用
          [].push.apply(this, arr);
          return this;
        },
        toString: function () { //返回一个字符串
          return [].slice.call(this).toString();
        },
        valueOf: function () {//获得里面的数组对象
          return [].slice.call(this);
        },
        pop:[].pop,
        push:[].push,
        shift:[].shift,
        unshift:[].unshift,
        reverse:[].reverse,
        indexOf: function(el,index){
          var n = this.length,
          i = index == null ? 0 : index < 0 ? Math.max(0, n + index) : index;
          for (; i < n; i++)
            if (i in this && this[i] === el) return i;
          return -1;
        }
      });
      Array2.alias("indexOf","contains")
      var a = new Array2(1,2,3,4,5);
      alert(a)//测试toString方法
      alert(a.indexOf(3))
      alert(a.contains(3))//测试别名机制

include，包含，类似ruby，添加原型成员。

      var movable = {
        run:function(){
          alert("能跑")
        },
        fly:function(){
          alert("能飞")
        }
      }
      var recognition  ={
        watch:function(){
          alert("看东西")
        },
        smell:function(){
          alert("能嗅东西")
        }
      }
      var Robot = dom.factory({
        init:function(name,type){
          this.name = name;
          this.type = name;
        },
        include:[movable,recognition]
      });
      var chi = new Robot("小叽","Chobits") ;
      alert(chi.name);
      chi.watch();
      chi.fly();

extend，扩展，类似ruby，添加类成员。

      var MyClass = dom.factory({});

      MyClass.extend({
        PI:"3.14",
        alert:function(){
          alert("这是静态（类）方法")
        },
        alertPI:function(){
          alert(MyClass.PI);
        }
      });
      MyClass.alert();//这是静态（类）方法
      MyClass.alertPI();//3.14
      var m = new MYClass
      m.alert()//报错MYClass is not defined

自扩展与自包含：

      var Module = {
        selfIncluded: function(klass) {
          klass.prototype.boo = 'boo';
        },
        selfExtended: function(klass) {
          klass.BOO = 'BOO';
        }
      };

      var MyClass = dom.factory({
        include: Module,
        extend:  Module
      });

      alert(MyClass.prototype.boo); // -> 'boo'
      alert(MyClass.BOO);           // -> 'BOO'

        dom.geometry = {};
        var Point = dom.geometry.Point = dom.factory({
            init: function(x, y) {
                this.x = x*1.0 || 0.0;
                this.y = y*1.0 || 0.0;
            },
            toString: function() {
                return this.x + ' ' + this.y;
            },
            clone: function() {
                return new Point(this.x, this.y);
            },
            eq: function(point) {
                return this.x == point.x && this.y == point.y;
            },
            //移动点到新的位置
            offset: function(x, y) {
                if (typeof x === 'object') {
                    y = x.y;
                    x = x.x;
                }
                this.x += x;
                this.y += y;
                return this;
            },
            extend:{
                fromString : function(string) {
                    var parts = string.split(/\s+/);
                    return new Point( parts[0], parts[1] );
                }
            }
        });

添加原型成员。

var movable = {
  run:function(){
    p("能跑")
  },
  fly:function(){
    p("能飞")
  }
}
var recognition  ={
  watch:function(){
    p("看东西")
  },
  smell:function(){
    p("能嗅东西")
  }
}
var Robot = oop({
  init:function(name,type){
    this.name = name;
    this.type = name;
  },
  include:[movable,recognition]
});
var chi = new Robot("小叽","Chobits") ;
p(chi.name);
chi.watch();
chi.fly();