Javascript 比较两个玩家分数数组，看看谁在列表中上升下降

我有两个数组，它们是在不同的时间段内获取的.如何判断列表中哪些球员上升/下降，并将新球员标记为上升？

P、 数组已经根据分数进行了排序.

pastData:[
  
    {
    playerName:'John Doe',
    score:50
    },
    {
    playerName:'Jane Doe',
    score:40
    },
    {
    playerName:'John Appleseed',
    score:30
    },
    {
    playerName:'John Walker',
    score:20
    },
  ]

presentData:[

    {
    playerName:'Jane Doe',
    score:80
    },
    {
    playerName:'John Doe',
    score:60
    },
    {
    playerName:'John Appleseed',
    score:40
    },
    {
    playerName:'John Mayer',
    score:30
    },
  ]

我需要判断比较这两个数组的索引更改，并得到如下输出.

   presentData:[

    {
    playerName:'Jane Doe',
    score:80,
    position:'up'
    },
    {
    playerName:'John Doe',
    score:60,
    position:'down'
    },
    {
    playerName:'John Appleseed',
    score:40,
    position:'same'
    },
    {
    playerName:'John Mayer',
    score:30,
    position:'up'
    },
  ]

我try 如下，但似乎无法找到新玩家用例的解决方案.

let status=[] //this array will include the changes 
which I can use later to update the presentData array 
with a "position:'up/down/same'" key-value pairs.

for (let i = 0; i < 4; i++) { 

  for(let j=0; j<4; j++) {

   if(Object.values(pastData)[i].id==Object.values(presentData)[j].id){
     if(i==j){
      status.push('same')

     }
     if(i<j){
      status.push('down')

      }
     if(i>j){
       status.push('up')
     }
   }

  }

  

}