javascript - 如何更改数组中对象的第一个 bool 值 react native ？

Question

我有一个来自API的JSON，API的响应是声明任务是否已经完成，

JSON 示例:

[ { Name: 'Pre Operation', Checked: false },
  { Name: 'Operation', Checked: false },
  { Name: 'Post Operation', Checked: false } ]

如何将 JSON 更新为:

[ { Name: 'Pre Operation', Checked: true},
  { Name: 'Operation', Checked: false },
  { Name: 'Post Operation', Checked: false } ]

我尝试过使用此代码:

var output = jsonResult.map((item)=>{
  if(item.Checked == true){
    item.Checked === false
  }
  return item
})

但是 JSON 没有改变，恐怕 item.Checked === false将影响所有item.Checked有true值

如果我收到这样的 API 响应:

[ { Name: 'Pre Operation', Checked: true},
  { Name: 'Operation', Checked: false },
  { Name: 'Post Operation', Checked: false } ]

我需要将 JSON 更新为如下所示:

    [ { Name: 'Pre Operation', Checked: true},
  { Name: 'Operation', Checked: true},
  { Name: 'Post Operation', Checked: false } ]

有人可以帮助我如何实现我的目标吗？

Answer 1

使用Array.find

var arr = [ { Name: 'Pre Operation', Checked: false }, { Name: 'Operation', Checked: false }, { Name: 'Post Operation', Checked: false } ];
  
  function updateStatus(){
    var result = arr.find(({Checked}) => !Checked); 
    if(result) result.Checked = true;
  }
  
 updateStatus(); console.log(arr); // first is updated
 updateStatus(); console.log(arr); // second is updated
 updateStatus(); console.log(arr); // third is updated
 updateStatus(); console.log(arr); // no update