javascript - delete object[element] 不会删除，而是将其设置为 null ....如何删除它而不是使其为 null？

Question

Object.keys(tours).forEach(el => {
    if (tours[el].id == 0) ***delete tours[el];***

  });

我想删除 Tours 对象中的 Object，但此功能将其设置为 null，而不是删除它。

删除操作前的游览是这样的

[
  {
    "id": 0,
    "name": "The Forest Hiker",
    "duration": 5,
    "maxGroupSize": 25,
    "difficulty": "easy",
    "ratingsAverage": 4.7
},
  {
    "id": 1,
    "name": "The Sea Explorer",
    "duration": 7,
    "maxGroupSize": 15,
    "difficulty": "medium",
    "ratingsAverage": 4.8
  }
]

删除后变成

[
 null,

  {
    "id": 1,
    "name": "The Sea Explorer",
    "duration": 7,
    "maxGroupSize": 15,
    "difficulty": "medium",
    "ratingsAverage": 4.8,
    "ratingsQuantity": 23,
    "price": 497,
    "summary": "Exploring the jaw-dropping US east coast by foot and by boat",
    "description": "Cpariatur.",
    "imageCover": "tour-2-cover.jpg",
    "images": ["tour-2-1.jpg", "tour-2-2.jpg", "tour-2-3.jpg"],
    "startDates": ["2021-06-19,10:00", "2021-07-20,10:00", "2021-08-18,10:00"]
  }
]

Answer 1

据我所知，tours 只是对象数组。所以你可以这样做:

根据任何条件删除

tours = tours.filter(t => t.id !== 0);

删除给定索引n

tours.splice(n, 1)

专门删除索引0

tours.shift()