I currently have two arrays that look like this:
let suits = ['♣', '♦', '♥', '♠'];
let cards = ['A','2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'];
And I want to combine these to contain an array of 52 strings with all possible combinations of cards. E.g.:
['A♣', 'A♦', 'A♥', 'A♠', '2♣' ...]
I know I could write two nested "for loops" and concatonate them, but is there a more efficient way to do this?
Thanks!
You could use Array.prototype.flatMap() method.
const suits = ['♣', '♦', '♥', '♠'];
const cards = ['A','2', '3', '4', '5', '6', '7', '8', '9', '10', 'J', 'Q', 'K'];
const ret = cards.flatMap((x) => suits.map((y) => `${x}${y}`));
console.log(ret);you can do that:
const suits = ['♣','♦','♥','♠']
, cards = ['A','2','3','4','5','6','7','8','9','10','J','Q','K']
;
const deck = cards.reduce((d,c)=>[...d,...suits.map(s=>s+c)],[])
console.log( deck ).as-console-wrapper { max-height: 100% !important; top: 0; }Or:
const deck = Array.from({length:52},(_,i)=>suits[Math.floor(i/13)]+cards[i%13])
