在 Javascript 中操作对象数组

我有一个对象数组，我想在其中进行操作。

这是数组

const customerInformation = [
{"id":"12345678","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"234566654","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"John Smith","accountId":"234566654","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"6374595864","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"155464348743","exec":{"execId":"1521648743","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Math Lo","accountId":"26726447342","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"98736478","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"hblwrv890","ownerId":"98765322","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"James Olive","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"256644477","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sbdbbgbg","ownerId":"32545453565","exec":{"execId":"32254655464","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Ben Right","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"99326672378372","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sjvjvnfrrev","ownerId":"28643872329","exec":{"execId":"268474374938","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Lowe John","accountId":"2225454354","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
]

我想做的是操作数组以生成一个小得多的数组。数组应如下所示。请注意，它使用的是独特的comid，这就是为什么您只能获得两个结果的原因。此外，第二个值必须返回未定义，因为它是要求

const obj = [{
'id': '12345678',
'ownerId': '234566654'
'userConnection': '1942f0e6',
'status' : 'Active',
'comid' : 'cs169612397275616092-1',
'extensionId' : '234566654',
'phoneNumber' : '+442222222222',
'startAt' : '2019-01-21T11:53:29.223Z',
},{
'id': undefined,
'ownerId': '98765322'
'userConnection': 'hblwrv890',
'status' : 'Active',
'comid' : 'cs169612397275616092-2',
'extensionId' : '2763648749',
'phoneNumber' : '+442222222222',
'startAt' : '2019-01-21T11:53:29.223Z',
}];

这就是我的代码目前的样子


var newArray= [];
customerInformation.forEach(function(element){
newArray.push(element.exec.communication[0].comid);
})
const uniqueId = [...new Set(newArray)];
var result = uniqueId.map(function(el) {
const [key, user] = Object.entries(customerInformation).find(([key, user]) => user.exec.communication[0].comid === el);

var o = Object.assign({});
o.extensionId = user.id
o.ownerId= user.exec.communication[0].comid
return o
})

这是我所能做到的。请我只是想了解我做错了什么。假设有更好的方法来做到这一点。请听起来很懒，但我正在寻找更好的解决方案

在数组上尝试 reduce 和 concat 方法。

const customerInformation = [
{"id":"12345678","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"234566654","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"John Smith","accountId":"234566654","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"6374595864","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"155464348743","exec":{"execId":"1521648743","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Math Lo","accountId":"26726447342","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"98736478","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"hblwrv890","ownerId":"98765322","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"James Olive","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"256644477","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sbdbbgbg","ownerId":"32545453565","exec":{"execId":"32254655464","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Ben Right","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"99326672378372","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sjvjvnfrrev","ownerId":"28643872329","exec":{"execId":"268474374938","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Lowe John","accountId":"2225454354","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
]
const obj = customerInformation.reduce(function( result, item ){
return result.concat({
id: item.id,
ownerId: item.ownerId,
userConnection: item.userConnection
});
}, []);
console.info(obj);

你没有解释如何组合元素，所以下面是一个疯狂的猜测。我不会试图解码你做错了什么，因为你发布的代码没有按照你的描述去做？(例如，您将comid分配给o.ownerId，但您的预期结果没有显示，并且您将user.id分配给o.extensionId，但我在原始数组中没有看到任何与预期结果中的extensionId具有相同值的id属性(

const customerInformation = [
{"id":"12345678","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"234566654","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"John Smith","accountId":"234566654","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"6374595864","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"155464348743","exec":{"execId":"1521648743","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Math Lo","accountId":"26726447342","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"98736478","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"hblwrv890","ownerId":"98765322","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"James Olive","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"256644477","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sbdbbgbg","ownerId":"32545453565","exec":{"execId":"32254655464","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Ben Right","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"99326672378372","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sjvjvnfrrev","ownerId":"28643872329","exec":{"execId":"268474374938","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Lowe John","accountId":"2225454354","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}}
];
const result = customerInformation.reduce((res, el) => {
const com = el.exec.communication[0];
// If the result array does not contain that comid yet
if (!res.some(el2 => el2.comid === com.comid)) {
// Add it
res.push({
id: el.id,
ownerId: el.ownerId,
userConnection: el.userConnection,
status: com.status,
comid: com.comid,
extensionId: com.extensionId,
phoneNumber: com.phoneNumber,
startAt: el.exec.eventTime
});
}
return res;
}, []);
// Because "it's the requirement"
result[1].id = undefined;
console.log(result);

你的例子有点令人困惑，但我会尝试提供帮助。

听起来您要做的是根据其中一个嵌套对象中的键对原始数组进行重复数据删除。像这样进行重复数据删除的常用方法是使用映射对象。并且您还希望在新数组中从该对象收集信息。由于对象引用的工作方式，您实际上可以同时执行这两个操作。

完整的解释器：这可以用一些较新的JS语法写得更好，试图保持简单:)

const customerInformation = [
{"id":"12345678","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"234566654","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"John Smith","accountId":"234566654","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"6374595864","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"1942f0e6","ownerId":"155464348743","exec":{"execId":"1521648743","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Math Lo","accountId":"26726447342","comid":"cs169612397275616092-1","status":"Active","phoneNumber":"+442222222222","extensionId":"234566654","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"98736478","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"hblwrv890","ownerId":"98765322","exec":{"execId":"20326379004","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"James Olive","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"256644477","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sbdbbgbg","ownerId":"32545453565","exec":{"execId":"32254655464","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Ben Right","accountId":"234566654","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
{"id":"99326672378372","timestamp":"2019-01-21T11:53:29.338Z","userConnection":"sjvjvnfrrev","ownerId":"28643872329","exec":{"execId":"268474374938","eventTime":"2019-01-21T11:53:29.223Z","communication":[{"name":"Lowe John","accountId":"2225454354","comid":"cs169612397275616092-2","status":"Active","phoneNumber":"+442222222222","extensionId":"2763648749","missedCall":false,"standAlone":false,"muted":false}]}},
]
const map = {};
const newArr = [];
for (const info of customerInformation) {
const id = info.exec.communication[0].comid;
if (!map[id]) {
	map[id] = {};
	newArr.push(map[id]);
}
Object.assign(map[id], {
	ownerId: info.ownerId,
	comid: id,
	extensionId: info.id,
	userConnection: info.userConnection
	// add whatever fields and other logic you want here
});
}
console.log('customerInformation', newArr);

我不明白一些问题，所以只是尽力伸出援手。不确定你说的Also the second value has to return undefined, as it's the requirement是什么意思

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