SOURCE

var expertise = "journalism"
var person = {
    name:"sharon",
    age:27
}

person[expertise] = {
    year: 5,
    interests:["a", "b", "c"]
}

function puzzle(){
    console.log(arguments);
}

function puzzle2(){
    return function(){
        console.log(arguments);
    }
}

//puzzle2(1,1,2,4)("a","b")
// const target = {a:"c"};
// const target2 = Object.assign(target, {a:"a"}, {b:"b"});
// console.log(target);
// console.log(target2);


const target3 = {}