javascript - 使用对象数组的特定属性创建数组

Question

这个问题已经有答案了:

From an array of objects, extract value of a property as array (25 个回答)

已关闭 6 年前。

有一个对象数组，如下所示。需要仅使用以下对象数组中的 VatCode 属性创建一个数组，而无需通过“for 循环”。这里的结果应该是
结果数组 = [1, 15, 25]

"Data": [
    {
        "Id": 1,
        "VatCode": 1,
        "Name": "Ingen mva.",            
        "VatAccount": {
            "ID": 3,
            "AccountNo": "3190",
            "Name": "Misc Items Income"
        }            
    },
    {
        "Id": 2,
        "VatCode": 15,
        "Name": "Lav mva.",           
        "VatAccount": {
            "ID": 3,
            "AccountNo": "3190",
            "Name": "Misc Items Income"
        }
    },
    {
        "Id": 3,
        "VatCode": 25,
        "Name": "Høy mva.",           
        "VatAccount": {
            "ID": 3,
            "AccountNo": "3190",
            "Name": "Misc Items Income"
        }
    },

]

Answer 1

Data = //your json data    

this.Data.map(data => data.VatCode);

The map() method creates a new array with the results of calling a function for every array element.

var data = [
    {
        "Id": 1,
        "VatCode": 1,
        "Name": "Ingen mva.",            
        "VatAccount": {
            "ID": 3,
            "AccountNo": "3190",
            "Name": "Misc Items Income"
        }            
    },
    {
        "Id": 2,
        "VatCode": 15,
        "Name": "Lav mva.",           
        "VatAccount": {
            "ID": 3,
            "AccountNo": "3190",
            "Name": "Misc Items Income"
        }
    },
    {
        "Id": 3,
        "VatCode": 25,
        "Name": "Høy mva.",           
        "VatAccount": {
            "ID": 3,
            "AccountNo": "3190",
            "Name": "Misc Items Income"
        }
    },

];

var s = data.map(data => data.VatCode);
console.log(s);