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);