Question

我有一个数组，我想根据数组中项目的索引重新排序

到目前为止，我尝试了两种不同的方法，但似乎数组的发布方式与发送时一样。

function orderPlayers(players, fpIndex){
    for(var i = 0; i < players.length; i ++ ){
        players.move(i, fpIndex);
        fpIndex = fpIndex + 1;
        if(fpIndex > players.length - 1){fpIndex = 0;}
    }
    return players;
 }

 Array.prototype.move = function (from, to) {
     this.splice(to, 0, this.splice(from, 1)[0]);
 };

数据示例：

fpIndex: 1 //The player that is first is at array index 1

Players: {
     player: {
         age: 19,
         name: Bob,
         piece: "red",
         isFirst: false
     }

     player: {
         age: 21,
         name: Steve,
         piece: "blue",
         isFirst: true
     }
}

应该出现：

Players: {
     player: {
         age: 21,
         name: Steve,
         piece: "blue",
         isFirst: true
     }

     player: {
         age: 19,
         name: Bob,
         piece: "red",
         isFirst: false
     }
}

Answer 1

所以你想要反转数组？你试过Array.prototype.reverse()吗？

Answer 2

这是你在找什么？见工作示例：

＆＃13;

var players = 
    {
      "Players": 
      [
        {
          "player": {
            "age": 21,
            "name": "Steve",
            "piece": "blue",
            "isFirst": true
          }
        },

        {
          "player": {
            "age": 19,
            "name": "Bob",
            "piece": "red",
            "isFirst": false
          }
        }
      ]
    }

var fpIndex = 1;

function orderPlayers(plys, index){
  index = index % plys.length;
  if(plys.length === 0 || plys.length === 1 || index === 0){
    return plys;
  }
  let part = plys.splice(plys.length - index);
  return part.concat(plys);
}

console.log(orderPlayers(players.Players, fpIndex));

＆＃13;

重新排序Javascript数组

2 个答案: