推送不在地图中工作

Question

我尝试添加新属性，检查兄弟数组是否为空，但无法通过推送实现我想要的效果。

https://jsbin.com/zutiboyaji/edit?html,js,console,output

let x = [{
    "name": [{
        "first": "m",
        "last": "jordan"
    }],
    "extraObj": [{
        "something": "bla bla bla"
    }]
}]

const result = x.map(obj => {
  if(obj.extraObj.length > 1){
    obj.name.extraObj.push({"whatever":"whatever"})
  }

  return obj
})

console.log(result) 

我的循环上面出了什么问题？

Answer 1

您的if条件失败是因为您正在检查length>1您应该使用length >=1。并且没有name个对象。使用obj.extraObj.push

let x = [{
    "name": [{
        "first": "m",
        "last": "jordan"
    }],
    "extraObj": [{
        "something": "bla bla bla"
    }]
}]

const result = x.map(obj => {
  if(obj.extraObj.length >= 1){
    obj.extraObj.push({"whatever":"whatever"})
  }
  
  return obj
})

console.log(result)