Question

在javascript中从嵌套对象中取出特定数组我有一个嵌套对象：

INPUT：

 {
  "countryList": [
    {
      "label": "Australia",
      "id": "555",
      "productHierarchy": "ABC",
      "locked": "true",
      "products": [
        {
          "id": "342",
          "label": "342- Test",
          "description": "Test"
        },
        {
          "id": "123456",
          "label": "123456- Test",
          "description": "Test"
        }
      ]
    },
    {
      "label": "Brazil",
      "id": "888",
      "productHierarchy": "XYZ",
      "locked": "true",
      "products": [
        {
          "id": "987",
          "label": "987- Test",
          "description": "Test"
        },
        {
          "id": "567",
          "label": "567- Test",
          "description": "Test"
        }
      ]
    }
  ]

}

从这个对象我想要一个根据countryList标签的产品数组。

输出

如果我将国家/地区标签作为澳大利亚

我想：

products= [
        {
          "id": "342",
          "label": "342- Test",
          "description": "Test"
        },
        {
          "id": "123456",
          "label": "123456- Test",
          "description": "Test"
        }
      ]

请帮我解决这个问题。

Answer 1

您可以使用Array#find：

label => data.countryList.find(e => e.label == label).products;

const data = {
  "countryList": [
    {
      "label": "Australia",
      "id": "555",
      "productHierarchy": "ABC",
      "locked": "true",
      "products": [
        {
          "id": "342",
          "label": "342- Test",
          "description": "Test"
        },
        {
          "id": "123456",
          "label": "123456- Test",
          "description": "Test"
        }
      ]
    },
    {
      "label": "Brazil",
      "id": "888",
      "productHierarchy": "XYZ",
      "locked": "true",
      "products": [
        {
          "id": "987",
          "label": "987- Test",
          "description": "Test"
        },
        {
          "id": "567",
          "label": "567- Test",
          "description": "Test"
        }
      ]
    }
  ]

};

const getProducts = label => data.countryList.find(e => e.label == label).products;

console.log(getProducts('Brazil'));

Answer 2

其中一种方法是使用Array.prototype的filter（如下所示）

＆＃13;

x={countryList:[{label:"Australia",id:"555",productHierarchy:"ABC",locked:"true",products:[{id:"342",label:"342- Test",description:"Test"},{id:"123456",label:"123456- Test",description:"Test"}]},{label:"Brazil",id:"888",productHierarchy:"XYZ",locked:"true",products:[{id:"987",label:"987- Test",description:"Test"},{id:"567",label:"567- Test",description:"Test"}]}]};

function getProducts(countryName){
  return x.countryList.filter(e=>e.label=countryName)[0].products;
}

console.log(getProducts("Australia"));

＆＃13;

在javascript中从嵌套对象中取出特定数组

2 个答案: