Question

我有以下对象：

prefix = 'some_string'

[prefix + i for i in mywords]

我想做的是通过此数据进行映射，其中名为“ CodedValues”的对象的索引为1，2和5，如下所示：

DOMAIN_ROLE:{
    type: "Domain"
    DomainName: "XYZ"
    DomainCode: 21
    Title: "People Role"
    CodedValues:{
        1: {Code: 1, Label: "Land"},
        2: {Code: 2, Label: "Forest"},
        3: {Code: 3, Label: "Public"},
        4: {Code: 4, Label: "Single"},
        5: {Code: 5, Label: "Private"}
       }
}

问题在于映射时，“键”的值为“代码”而不是数字1,2,3 ... 似乎密钥变成了key = CodedValues.Code，我想在其中工作，因为key = 1，key = 2，key = 5

试图以最好的方式进行解释。任何建议都会有所帮助。

Answer 1

let DOMAIN_ROLE = {
    type: "Domain",
    DomainName: "XYZ",
    DomainCode: 21,
    Title: "People Role",
    CodedValues:{
        1: {Code: 1, Label: "Land"},
        2: {Code: 2, Label: "Forest"},
        3: {Code: 3, Label: "Public"},
        4: {Code: 4, Label: "Single"},
        5: {Code: 5, Label: "Private"}
       }
}

// you can use object destructuring to get the data by key.

const {1:first,2:second, 5:fifth} = DOMAIN_ROLE.CodedValues;

console.log(first,second, fifth)


//[first, second, fifth].map(()=>{})

Answer 2

DOMAIN_ROLE.CodedValues[1,2,5]实际上不是您所期望的（获取具有键1,2和5的项）。您必须获取所有密钥并对其进行过滤和使用：

Object.keys(DOMAIN_ROLE.CodedValues).filter(k => /* filter logic */).map(key => {
    // Use key here: DOMAIN_ROLE[key]
});

如果您要基于某些逻辑过滤密钥，这将很有帮助。如果您要对键进行硬编码，为什么不直接在注释中使用['1', '2', '5'].map(key => { /**/ });作为@str键。

访问JavaScript中另一个对象内的对象

2 个答案: