ECMAScript 6 入门之Proxy代理和set

1、Proxy代理

1、

var user={

    full_name:function () {

        return this.fname+" "+this.lname;

    }

};

user.fname="bob";

user.lname="wood";

console.log("user.fullname:",user.full_name);

2、

var user={

    full_name:function () {

        return this.fname+" "+this.lname;

    }

};

user.fname="bob";

user.lname="wood";

console.log("user.fullname():",user.full_name());

3、

var user=new Proxy({},{

    get:function (obj,prop) {

        if(prop=="full_name")

            return obj.fname+' '+obj.lname;

    }

});

user.fname="bob";

user.lname="wood";

console.log("user.full_name:",user.full_name);

console.log("user.age:",user.age);

4、

var user=new Proxy({},{

    get:function (obj,prop) {

        switch (prop){

            case 'full_name':

                return obj.fname+' '+obj.lname;

        }

    }

    // ,

    // set:function (obj, prop) {

    //

    //

    // }

});

user.fname="bob";

user.lname="wood";

console.log("user.full_name:",user.full_name);

console.log("user.age:",user.age);

var user=new Proxy({},{

    get:function (obj,prop) {

        switch (prop){

            case 'full_name':

                return obj.fname+' '+obj.lname;

        }

    }

    ,

    set:function (obj, prop) {

    }

});

user.fname="bob";

user.lname="wood";

console.log("user.full_name:",user.full_name);

console.log("user.age:",user.age);

2、Set

var arr=[1,2,3,3];

console.log("arr:",arr);

var s=new Set([1,2,3,3]);

console.log("s:",s);

console.log("s.sise:",s.size);

s.add(4);

console.log("s:",s);

s.delete(2);

console.log("s:",s);

console.log("s.has(5):",s.has(5));

console.log("s.has(3):",s.has(3));

s.clear();

console.log("s:",s);