SOURCE

let a = 1;
setTimeout(()=>{
	let a = 10;
},1000)

const c = ()=>{}

const d = (a,b) => {

}

var a1 = (callback)=>{

	setTimeout(()=>{
    	callback();
    },1000)
}

var b1 = ()=>{
	//...
}

a1(b1);

//promise

let a2 = ()=>{
	return new Promise((resolve,project)=>{
    	setTimeout(()=>{
        resolve();
        },1000)
    })
}

a1().then(b1)

const getVerifiedToken = selector => {
  return getUsers()
    .then(users => users[0])
    .then(verifyUser)
    .then((user, verifiedToken) => verifiedToken)
    .catch(err => log(err.stack));
}

(...args) => args[0]

let ac = ()=>{
  
}
c1=(x)=> {
	x +1
  
 
}
var foo = (x)=> {
  x+1
}
var bar = {c2:1}
const square = x => x * x;

const full = ({ first, last }) => first + ' ' + last;

const has = p => o => o.hasOwnProperty(p);
const sortBy = p => (a, b) => a[p] > b[p];
const is = p => v => o => o.hasOwnProperty(p) && o[p] == v;

const add = x => y => y + x;