javascript - 从对象中删除标识符

Question

我有一个带有标识符的对象:

const cities = {
  "0": {
    "city": "Bielsko-Biała",
    "country": "PL",
  },
  "1": {
    "city": "Kielce",
    "country": "PL",
  },
  "2": {
    "city": "Kłodzko",
    "country": "PL",
  }
}

我想要的是删除 0、1、2 等以获得此格式:

const cities = [
   {
    "city": "Bielsko-Biała",
    "country": "PL",
  },
 {
    "city": "Kielce",
    "country": "PL",
  },
  {
    "city": "Kłodzko",
    "country": "PL",
  }
]

这对我来说是必要的，因为我想为每个城市添加描述，但由于这种格式，我无法在该对象中进行映射。

我必须在 React 中做类似的事情，我认为这是一个非常糟糕的编写代码:

const cities = [];

countries.map(el => {
  cities.push(el.city)
})

let updatedCountries = countries;

cities.forEach((city) => {
  axios.get(`https://en.wikipedia.org/api/rest_v1/page/summary/${city}`)
    .then(response => {
      for (let property in updatedCountries) {
        if (updatedCountries.hasOwnProperty(property)) {
          if (updatedCountries[property].city === city) {
            updatedCountries[property]['description'] = response.data.description
          }
        }
      }
    })
})

this.setState({
  countries: updatedCountries
})

Answer 1

您可以使用Object.values()

The Object.values() method returns an array of a given object's own enumerable property values,

const cities = {
  "0": {
    "city": "Bielsko-Biała",
    "country": "PL",
  },
  "1": {
    "city": "Kielce",
    "country": "PL",
  },
  "2": {
    "city": "Kłodzko",
    "country": "PL",
  }
}
let values = Object.values(cities);
console.log(values);