//ES6 Maps and Sets - Create a map and add items

// general flow create a map, assign a key in which you can retrieve objects
let cardAce = {
  name : 'Ace of Spades'
};

let cardKing = {
  name : 'King of Clubs'
};


let deck = new Map();    // Create a new Map object
let deckAlt = new Map([['as', cardAce], ['kc', cardKing]]); // Alternative Syntax to create our deck map

deck.set('as', cardAce);  //Set new key/value in our deck map
deck.set('kc', cardKing); //Set new key/value in our deck map

//ES6 Maps and Sets - Retrieving and Managing values within the map

let cardAce = {
  name : 'Ace of Spades'
};

let cardKing = {
  name : 'King of Clubs'
};


let deck = new Map();  
deck.set('as', cardAce);  
deck.set('kc', cardKing); 


console.log(deck.size); //access size of map
console.log(deck.get('as')); //get(keyvalue) - retrieves value from map by key
console.log(deck.delete('as')); //delete(keyvalue) - deletes value from map by key
console.log(deck.clear()); //clear() - removes all key/value pairs from the map

//ES6 Maps and Sets - Looping through maps

let cardAce = {
  name : 'Ace of Spades'
};

let cardKing = {
  name : 'King of Clubs'
};


let deck = new Map();  
deck.set('as', cardAce);  
deck.set('kc', cardKing); 

//Loops through map and returns the keys
for (key of deck.keys()) {
  console.log(key);
}

//Loops through map and returns the values
for (value of deck.values()) {
  console.log(value);
}


//Loops through map and returns the key/value pairs as an array - Method #1
for (entry of deck.entries()) {
  console.log(entry);
}

//Loops through map and returns the key/value pairs as an array - Method #2
for (entry of deck) {
  console.log(entry);
}

//You can also override looping through your map using iterators and next() because it is an array