在数组对象中，如何仅更改第二级的值-解网

问：

我有一个数组对象，我想仅在第二级（名称为梨）中将 isFavorite 的值更改为 true，我尝试了地图函数，但这在每个级别上都在更改值，我在下面编写了该函数，任何人都可以看看它有什么问题吗？

功能

const fruitChecked = fruits.map((fruit) => ({
  ...fruit,
  attributes: fruit[1].attributes.map((attribute) => ({
    ...attribute,
    isFavorite: true,
  })),
}));

数组示例

[
  {
    name: "apple",
    attributes: [
      { type: "Granny Smith", color: "green", isFavorite: true },
      { type: "Ambrosia", color: "red", isFavorite: false },
      { type: "Persian", color: "red", isFavorite: false },
      { type: "Asian", color: "brown", isFavorite: true },
      { type: "greek", color: "red", isFavorite: false },
    ],
  },
  {
    name: "Pear",
    attributes: [
      { type: "Asian", color: "brown", isFavorite: true },
      { type: "White Pear", color: "white", isFavorite: false },
      { type: "Asian", color: "brown", isFavorite: true },
      { type: "White Pear", color: "white", isFavorite: false },
    ],
  },
];

我尝试了我提到的功能，也提到了我正在尝试的 dat。我使用了地图，但这并没有给我结果。

JavaScript 数组函数对象 javascript 对象

const fruits=[
      {name: 'apple', 
       attributes: [
          {type: 'Granny Smith', color:'green', isFavorite: true},
          {type: 'Ambrosia', color:'red', isFavorite: false},
          {type: 'Persian', color:'red', isFavorite: false},
          {type: 'Asian', color:'brown', isFavorite: true},
          {type: 'greek', color:'red', isFavorite: false}
       ], 
 
    },
   {name: 'Pear', 
    attributes: [
      {type: 'Asian', color:'brown', isFavorite: true},
      {type: 'White Pear', color:'white', isFavorite: false},
      {type: 'Asian', color:'brown', isFavorite: true},
      {type: 'White Pear', color:'white', isFavorite: false}
    ], 
   }
  ];
 
fruits[1].attributes.forEach(a=>a.isFavorite=true);

console.log(fruits);

0赞 James 7/14/2023 #2

在地图中，在更改属性之前，您需要检查水果名称是否为 Pear：

const fruits = [
  {
    name: "apple",
    attributes: [
      { type: "Granny Smith", color: "green", isFavorite: true },
      { type: "Ambrosia", color: "red", isFavorite: false },
      { type: "Persian", color: "red", isFavorite: false },
      { type: "Asian", color: "brown", isFavorite: true },
      { type: "greek", color: "red", isFavorite: false },
    ],
  },
  {
    name: "Pear",
    attributes: [
      { type: "Asian", color: "brown", isFavorite: true },
      { type: "White Pear", color: "white", isFavorite: false },
      { type: "Asian", color: "brown", isFavorite: true },
      { type: "White Pear", color: "white", isFavorite: false },
    ],
  },
];

const adjustedFruits = fruits.map(fruit => ({
  ...fruit,
  attributes: fruit.name === "Pear"
    ? fruit.attributes.map(att => ({
      ...att,
      isFavorite: true
    }))
    : fruit.attributes
}));

console.log(adjustedFruits);

在数组对象中，如何仅更改第二级的值

In an array object how to change only value on second level

评论

评论