[英]Flatten an array of objects and strings
我有一个像这样的对象数组:
const arr = [ {
realEstateBasicInfoResDto: {
type: "Detached house",
kind: "Class01"
},
assetId: "1",
realEstateAddressInfoResDto: {
county: null,
municipality: null,
municipalitySection: null,
address: "Attica, N. Ionia, Iolkou",
addrNumberFrom: 8,
addrNumberTo: 0,
addrLetterFrom: null,
addrLetterTo: null,
addressSec: null,
addrSecLetterFrom: null,
addrSecLetterTo: null,
addrSecNumberFrom: 0,
addrSecNumberTo: 0,
postalCode: "1"
},
realEstateEstimationValuesResDtos: [ ]
},
{
realEstateBasicInfoResDto: {
type: "Detached house",
kind: "Class01"
},
assetId: "11",
realEstateAddressInfoResDto: {
county: null,
municipality: null,
municipalitySection: null,
address: "Attica, N. Ionia, Iolkou",
addrNumberFrom: 8,
addrNumberTo: 0,
addrLetterFrom: null,
addrLetterTo: null,
addressSec: null,
addrSecLetterFrom: null,
addrSecLetterTo: null,
addrSecNumberFrom: 0,
addrSecNumberTo: 0,
postalCode: "2"
},
realEstateEstimationValuesResDtos: [ ]
},
]
我希望输出只有属性,里面没有对象键。
我正在使用这个功能:
const flatten = o =>
Object.keys(o).reduce(
(obj, key) =>
typeof o[key] === "object" && o[key] !== null
? { ...obj, ...flatten(o[key]) }
: { ...obj, [key]: o[key] },
{}
);
它似乎工作正常,但我在我的对象数组上得到的结果是这样的:
flatten(arr) =
{
addrLetterFrom: null
addrLetterTo: null
addrNumberFrom: 8
addrNumberTo: 0
addrSecLetterFrom: null
addrSecLetterTo: null
addrSecNumberFrom: 0
addrSecNumberTo: 0
address: "Attica, N. Ionia, Iolkou"
addressSec: null
assetId: "3"
county: null
kind: "Class01"
municipality: null
municipalitySection: null
postalCode: null
type: "Detached house"
}
它实际上只返回最后一个展平的对象。 我想返回一个两个对象都展平的数组。 我错过了什么? 谢谢。
您的flatten
函数处理单个对象,因此您需要使用Array.map()
迭代数组,并将您的 flatten 函数应用于每个对象:
const arr = [{"realEstateBasicInfoResDto":{"type":"Detached house","kind":"Class01"},"assetId":"1","realEstateAddressInfoResDto":{"county":null,"municipality":null,"municipalitySection":null,"address":"Attica, N. Ionia, Iolkou","addrNumberFrom":8,"addrNumberTo":0,"addrLetterFrom":null,"addrLetterTo":null,"addressSec":null,"addrSecLetterFrom":null,"addrSecLetterTo":null,"addrSecNumberFrom":0,"addrSecNumberTo":0,"postalCode":"1"},"realEstateEstimationValuesResDtos":[]},{"realEstateBasicInfoResDto":{"type":"Detached house","kind":"Class01"},"assetId":"11","realEstateAddressInfoResDto":{"county":null,"municipality":null,"municipalitySection":null,"address":"Attica, N. Ionia, Iolkou","addrNumberFrom":8,"addrNumberTo":0,"addrLetterFrom":null,"addrLetterTo":null,"addressSec":null,"addrSecLetterFrom":null,"addrSecLetterTo":null,"addrSecNumberFrom":0,"addrSecNumberTo":0,"postalCode":"2"},"realEstateEstimationValuesResDtos":[]}]; const flatten = o => Object.keys(o).reduce( (obj, key) => typeof o[key] === "object" && o[key] !== null ? { ...obj, ...flatten(o[key]) } : { ...obj, [key]: o[key] }, {} ); const result = arr.map(flatten); console.log(result);
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