如何在react中查找两个嵌套数组之间的不匹配元素

Question

下面有两个数组。阵列1:

{
"0":{
"countries":{
"BDI":{
"count":1
},
"IRN":{
"count":1
}
},
"checkId":"16835659691517226105"
},
"1":{
"countries":{
"ZAF":{
"count":2
}
},
"checkId":"144165083478491226"
}
}

阵列2:

{
"0":{
"countries":{
"AIA":{
"count":2
}
},
"checkId":"144165083478491106"
},
"1":{
"countries":{
"BDI":{
"count":1
},
"IRN":{
"count":1
},
"ATA":{
"count":5
}
},
"checkId":"16835659691517226105"
}

}

我想找出两个数组之间的不匹配和公共元素。目前，我正在执行两个for循环，以查找基于checkid的两个数组之间的匹配元素，但我无法从这两个数组中找到非公共元素。的一些代码片段

array1.forEach(each => {
array2.forEach(compareTask => {
var teastEach = Object.entries(compareTask.countries);
if (each.checkId === compareTask.checkId) {
firstCount = each.count
secondCount = compareTask.count
countDifference =  secondCount - firstCount

我可以得到常见的校验码，但不能得到非常见的校验号。预期输出：

{
"0":{
"countries":{
"ZAF":{
"count":2
}
},
"checkId":"144165083478491226"
},
"1":{
"countries":{
"AIA":{
"count":2
}
},
"checkId":"144165083478491106"
}
}

Answer 1

从注释来看，您可以使用Map()

object1 = { "0": { countries: { BDI: { count: 1, }, IRN: { count: 1, }, }, checkId: "16835659691517226105", }, "1": { countries: { ZAF: { count: 2, }, }, checkId: "144165083478491226", }, };
object2 = { "0": { countries: { AIA: { count: 2, }, }, checkId: "144165083478491106", }, "1": { countries: { BDI: { count: 1, }, IRN: { count: 1, }, ATA: { count: 5, }, }, checkId: "16835659691517226105", }, };
map = new Map();
arr = [Object.values(object1), Object.values(object2)].flat();
result = [
...arr
.reduce((r, o) => {
const dupli = r.get(o.checkId);
dupli ? r.delete(o.checkId) : r.set(o.checkId, o);
return r;
}, new Map())
.values(),
];
console.log(result);