Question

这是我的数据阵列：

[{
    "CodeDescription": "Spouse",
    "CodeID": "2",
    "CodeType": "HouseOwn",
    "ParentCodeID": "",
    "ParentType": ""
}, {
    "CodeDescription": "Parent",
    "CodeID": "3",
    "CodeType": "HouseOwn",
    "ParentCodeID": "",
    "ParentType": ""
}, {
    "CodeDescription": "AAA",
    "CodeID": "6",
    "CodeType": "City",
    "ParentCodeID": "",
    "ParentType": ""
}, {
    "CodeDescription": "Own",
    "CodeID": "1",
    "CodeType": "HouseOwn",
    "ParentCodeID": "",
    "ParentType": ""
}, {
    "CodeDescription": "BBB",
    "CodeID": "006",
    "CodeType": "Area",
    "ParentCodeID": "6",
    "ParentType": "City"
}, {
    "CodeDescription": "CCC",
    "CodeID": "Z01",
    "CodeType": "Area",
    "ParentCodeID": "6",
    "ParentType": "City"
}]

如何获取CodeDescription具有值CodeType的所有"HouseOwn"个对象？

Answer 1

您可以过滤和映射数据（使用ES6语法）：

let descriptions = data.filter(item => item.CodeType === "HouseOwn")
                       .map(item => item.CodeDescription);

console.log(descriptions); // Array [ "Spouse", "Parent", "Own" ]

ES5类比：

var descriptions = data.filter(function(item) {
    return item.CodeType === "HouseOwn";
}).map(function(item) {
    return item.CodeDescription;
});

console.log(descriptions); // Array [ "Spouse", "Parent", "Own" ]

Answer 2

这样的事情：

var codeDescriptionArray = theArrayofObjects
  .filter(function(obj) {
    return obj.codeType === "HouseOwn";
  })
  .map(function(obj) {
    return obj.codeDescription;
  });

这是一个很棒的教程，可以帮助您使用函数式编程练习排序技术：http://reactivex.io/learnrx/

如何从后端服务中对数据进行排序？

2 个答案: