如何基于两个属性对数组对象进行排序

Question

Hi i have an array of objects

cards = [
{ Asset: "2C.jpg",
  CardName: "2C",
  CardPlayed: 0,
  Playbell: 0,
  PlayerName: "player1",
  Rank: 2,
  Suit: "C"
},
{ Asset: "9S.jpg",
  CardName: "9S",
  CardPlayed: 0,
  Playbell: 0,
  PlayerName: "player2",
  Rank: 9,
  Suit: "S"
},
{ Asset: "6D.jpg",
  CardName: "6D",
  CardPlayed: 0,
  Playbell: 0,
  PlayerName: "player1",
  Rank: 6,
  Suit: "D"
}];

and i need to sort those objects base on Suit property but only for the object that have the PlayerName property value equal to "player1" and many thanks in advance for any help.

Answer 1

To sort the array on PlayerName and then Suit :

cards.sort(function(x, y){
  return (
    x.PlayerName < y.PlayerName ? -1 :
    x.PlayerName > y.PlayerName ? 1 :
    x.Suit < y.Suit ? -1 :
    x.Suit > y.Suit ? 1 :
    0
  );
});

Answer 2

var filtered = cards.filter(function(card){
    return card.PlayerName === "player1";
});

var sorted = filtered.sort(function(a,b){
  if (a.Suit > b.Suit) {
    return 1;
  }
  if (a.Suit < b.Suit) {
    return -1;
  }
  // a must be equal to b
  return 0;
});

According to MDN filter doesn't work on ie8 and below, you could use a polyfill as stated on https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/filter , or you could iterate over all items and filter them manually like this:

var filtered = [];
for (var i in cards){
    if (cards[i].PlayerName === "player1"){
        filtered.push(cards[i]);
    }
}

// and then sort it like before