ES6 is coming,functions will never be the same again

var harmonyFunc=s => s;
alert(harmonyFunc(2));

var harmonyFunc2=() => 'Welcome to the Matrix,Neo';
alert(harmonyFunc2());

//These lyrics found themselves on Mozilla Developer Network from a Maroon5 Song
var a=["We're up all night 'till the sun",
       "We're up all night to get some",
       "We're up all night for good fun",
       "We're up all night to get lucky"
      ];
//defining an anonymous inner function...
var harmonyFunc3=a.map(s=>s.length);
alert(JSON.stringify(harmonyFunc3));

var PersonOriginal=function()
{
   this.age=0;
    setInterval(()=>{
        if(this.age<24)
        {
            console.log(age);
            this.age++;//this refers to person
        }
    },1000);

}

//cannot create constructors using the harmony functional notation
//something to remember when you are creating brand new objects...this
//is because it does not have a sense of this...evil smiley face
var Person=() => {
    this.age=0;
    setInterval(()=>{
        if(this.age<24)
        {
            console.log(age);
            this.age++;//this refers to person
        }
    },1000);
}

var p=new Person();