// Hoisting

let someFunc = function() {
  // var b = undefined;
  // TEMPORAL DEADZONE let a, name, printName;

  // If we try to use variables (a, name ,printName) Reference Error!
  let a = 5;
  let name = 'Ivan';
  let printName = (param) => { };

  // If we try to use b here it will be undefined
  var b = 10;
};

f();
function f() { };

let f2 = () => { };

// Reference Type passing

let person = {name:'Ivan'};
let person2 = person;
person2.name = 'Gosho';
console.log(person); // {name:'Gosho'};
console.log(person2); // {nane:'Gosho'};