KLagdani

//myVar is hoisted during the creation of the context execution
//It exists in memory with undefined as a value
myVar = "I am a var"; //Perfectly ok
console.log(myVar); //Prints "I am a var"
var myVar;
 
//OR
console.log(myVar); //Perfectly ok, prints "undefined"
var myVar;

KLagdani

//myLet is hoisted during the creation of the context execution
//It exists in memory with undefined as a value
//But we are not allowed to access it before declaring it
myLet = "I am a let"; //Throws: Cannot access 'myLet' before initialization 
console.log(myLet); 
let myLet;

KLagdani

//myConst is hoisted during the creation of the context execution
//It exists in memory with undefined as a value
//But we are not allowed to access it before declaring it
myConst = "I am a const"; //Throws: Cannot access 'myConst' before initialization
console.log(myConst); //line not reached due to error thrown above
const myConst = "Initializer";

KLagdani

//sayHi is hoisted during the creation of the context execution
sayHi("Bulma"); //calls the function and prints "Bulma says hi"
function sayHi(who) {
 console.log(who + " says hi");
}

KLagdani

attack("Son Goku"); 
var attack = function(who) {
 console.log(who + " attacked you!");
};

KLagdani

attack("Son Goku");
function attack(who) {
 console.log(who + " attacked you!");
}

KLagdani

var saiyan = {
  firstName: "Son Goku",
  attackName: "Kamehameha",
  address: {
    street: "439 East District",
    city: "Paozu"
  }
};

KLagdani

function attack() {
  console.log("You have been attacked!");
}
attack.newProperty = "holololo";
console.log(attack.newProperty); //holololo

KLagdani

var multiplyByTen = function(num) {
  return num * 10;
};

function mapArray(arr, fn) {
  var resultingArr = [];
  for (var i = 0; i < arr.length; i++) {
    resultingArr.push(fn(arr[i]));
  }
  return resultingArr;

KLagdani

function attack(attacker) {
  return function(attackName) {
    console.log(attacker + " throws a " + attackName);
  };
}

var throwAttack = attack("Son Goku");
throwAttack("Kamehameha");