迭代对象中的所有属性，查找并替换

Question

I have this Javascript object generated from my code and player object is

const player = {
   cards: []
}

My question is how do I loop through all my card in player object and replace all the "A" faceValue to 1? Using findIndex or splice?

player: Object
cards: Array(2)
0: Array(1)
0: card {suit: "spades", face: "7", faceValue: 7}
length: 1
__proto__: Array(0)
1: Array(1)
0: card {suit: "clubs", face: "A", faceValue: 11}
length: 1
1: Array(2)
0: card {suit: "spades", face: "A, faceValue: 11}
length: 1

Answer 1

You can use Array map your cards object to update its value

player.cards = player.cards.map(card => {
    if (card.face === 'A') card.faceValue = 1;
    return card;
});

Update: It is better to use forEach if we are not generating new values

player.cards.forEach(card => {
    if (card.face === 'A') card.faceValue = 1;
});