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Федотов
Asked:2022-03-03 22:35:05 +0800 CST2022-03-03 22:35:05 +0800 CST

查找并添加对象

  • 772
[
  {
    "id": 1,
    "name": "Алексей",
    "base": [
      {
        "user_class": 1,
        "type": 1,
      },
      {
        "user_class": 1,
        "type": 4,
      },
    ]
  },
  {
    "id": 2,
    "name": "Сергей",
    "base": []
  }
]

如何使用 JavaScript 找到id == 2用户 Sergey 并将他添加到base对象中

javascript

2 个回答

  1. Best Answer

    例如，像这样：

    const users = [
  {
    "id": 1,
    "name": "Алексей",
    "base": [
      {
        "user_class": 1,
        "type": 1,
      },
      {
        "user_class": 1,
        "type": 4,
      },
    ]
  },
  {
    "id": 2,
    "name": "Сергей",
    "base": []
  }
];

const foundUser = users.find(user => user.id === 2);

foundUser.base.push({});

console.log(users);

    • 2

  2. 如果您不想更改原始数据：

    复制一份，find然后push：

    const data = [{
    "id": 1,
    "name": "Алексей",
    "base": [
      {"user_class": 1,"type": 1,},
      {"user_class": 1,"type": 4,},
    ]
  },
  {
    "id": 2,
    "name": "Сергей",
    "base": []
  }
]

function findAndAdd(data, id, obj) {
  const copy = data.map(d => {
    return { ...d,
      base: [...d.base]
    }
  })
  const index = copy.findIndex(d => d.id === id)
  if (index > -1) {
    copy[index].base.push(obj)
  }
  return copy
}

console.log('before', data)
console.log('new', findAndAdd(data, 2, {
  "user_class": 10,
  "type": 10,
}))
console.log('after', data)

    • 2

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