Question

我有这个对象数组：

const array = [
  {id: 35, id_city: 27, id_district: 453},
  {id: 36, id_city: 27, id_district: 454}
];

我希望将“ id_district”值放入新数组中，因此结果应为：

const ArraydDistrict = [453,454];

我想答案很简单，对此我真的很陌生，所以我们将不胜感激。谢谢

Answer 1

您可以使用Array.map返回值。

const array = [
               {id: 35, id_city: 27, id_district: 453},
               {id: 36, id_city: 27, id_district: 454},
              ];

const result = array.map(el => {  return el.id_district})

//Results in [453, 454]

您还可以使用隐式返回来减少冗长程度。

const result = array.map(el => el.id_district)

如果想花哨的话，ES6可以帮助您

const result = Array.from(array, el => el.id_district)

Answer 2

这似乎是Array.map的用例

const arr = [{id: 35, id_city: 27, id_district: 453},{id: 36, id_city: 27, id_district: 454}];

const processedArr = arr.map(o => o.id_district);
console.info(processedArr);

看看Array.map，Array.filter，Array.reduce，所有这些函数在数组处理中都很方便。

Answer 3

您可以使用以下解决方案将对象数组中的值放入JavaScript中的新数组中：

const ArraydDistrict = [];
const array = [
    {id: 35, id_city: 27, id_district: 453},
    {id: 36, id_city: 27, id_district: 454},
];

array.forEach(function(item) {
  ArraydDistrict.push(item.id_district);
});

console.log(ArraydDistrict);

如何将对象数组中的值放入JavaScript中的新数组中

3 个答案: