如何合並兩個包含相同鍵的不同值的對象數組，並將新的 object 推入數組？

Question

我有兩個 arrays：

arr1 = [
  {
    "OwnershipNumber": 0,
    "ID": null,
    "Name": "Contractor LLC",
    "ContrEmployeeTypeId": 0,
    "ContactEmail": "",
    "ContactPhone": "",
    "VeteranEmployeeMilitaryAffiliation": "",
    "SocialSecurityNumber": "",
    "DrivingLicense": "",
    "DateOfBirth": null,
    "OwnershipPercentage": 0,
    "IsContractorActive": "Y",
    "VeteranFlag": "N",
    "VeteranEmployeeHireDate": null,
    "LegalIssueFlag": "N",
    "ActiveFlag": true,
    "TimeStamp": null
  },
  {
    "OwnershipNumber": 1878,
    "ID": null,
    "Name": "Greg Dawson",
    "ContrEmployeeTypeId": 2,
    "ContactEmail": "pra@abc.com",
    "ContactPhone": "455-455-6444",
    "VeteranEmployeeMilitaryAffiliation": null,
    "SocialSecurityNumber": "454534245",
    "DrivingLicense": "44524245",
    "DateOfBirth": "11/30/1968 12:00:00 AM",
    "OwnershipPercentage": 100,
    "IsContractorActive": "Y",
    "VeteranFlag": "N",
    "VeteranEmployeeHireDate": null,
    "LegalIssueFlag": "N",
    "ActiveFlag": true,
    "TimeStamp": null
  }
]


arr 2 = [ {"OwnershipNumber": 1878, "ContactPhone": "111-222-6444"},
 {
    "OwnershipNumber": null,
    "ID": 3,
    "SocialSecurityNumber": "465464654",
    "DrivingLicense": "464654654654",
    "DateOfBirth": "1998-12-12T18:30:00.000Z",
    "VeteranEmployeeHireDate": "1970-01-01T00:00:00.000Z",
    "Name": "Tom Hanks",
    "ContrEmployeeTypeId": 1,
    "IsContractor": "N",
    "ContactEmail": "tom@gmail.com",
    "ContactPhone": "564-465-4654",
    "OwnershipPercentage": 100
  }
]

在合並和推送之后，我正在嘗試完成此操作：

arr3 = [
      {
        "OwnershipNumber": 0,
        "ID": null,
        "Name": "Contractor LLC",
        "ContrEmployeeTypeId": 0,
        "ContactEmail": "",
        "ContactPhone": "",
        "VeteranEmployeeMilitaryAffiliation": "",
        "SocialSecurityNumber": "",
        "DrivingLicense": "",
        "DateOfBirth": null,
        "OwnershipPercentage": 0,
        "IsContractorActive": "Y",
        "VeteranFlag": "N",
        "VeteranEmployeeHireDate": null,
        "LegalIssueFlag": "N",
        "ActiveFlag": true,
        "TimeStamp": null
      },
      {
        "OwnershipNumber": 1878,
        "ID": null,
        "Name": "Greg Dawson",
        "ContrEmployeeTypeId": 2,
        "ContactEmail": "pra@abc.com",
        "ContactPhone": "111-222-6444",
        "VeteranEmployeeMilitaryAffiliation": null,
        "SocialSecurityNumber": "454534245",
        "DrivingLicense": "44524245",
        "DateOfBirth": "11/30/1968 12:00:00 AM",
        "OwnershipPercentage": 100,
        "IsContractorActive": "Y",
        "VeteranFlag": "N",
        "VeteranEmployeeHireDate": null,
        "LegalIssueFlag": "N",
        "ActiveFlag": true,
        "TimeStamp": null
      },
{
    "OwnershipNumber": null,
    "ID": 3,
    "SocialSecurityNumber": "465464654",
    "DrivingLicense": "464654654654",
    "DateOfBirth": "1998-12-12T18:30:00.000Z",
    "VeteranEmployeeHireDate": "1970-01-01T00:00:00.000Z",
    "Name": "Tom Smith",
    "ContrEmployeeTypeId": 1,
    "IsContractor": "N",
    "ContactEmail": "tom@gmail.com",
    "ContactPhone": "564-465-4654",
    "OwnershipPercentage": 100
  }
    ]

第一個數組 (arr1) 是主數組，第二個數組 (arr2) 僅包含對第一個數組所做的更改（在此示例中，您可以看到所有權編號 1878 在 ContactPhone 字段中發生了更改，因此 ContactPhone與所有權編號一起出現在 arr2 中，它還可以包括一個新的 object 就像名稱字段湯姆史密斯的那個（這個在 arr 1 中不存在），我正在嘗試根據 OwnershipNumber 和 ContactEmail 合並更改將新元素（即 object）添加到新數組 (arr3) 中，其名稱字段為 Tom Smith。 新元素的更改和包含是可選的，這意味着存在 arr 2 可能為空白的情況。 請幫我解決這個問題。

Answer 1

我假設OwnerdhipNumber是一個唯一鍵，可以知道您要在哪個 object 上進行更改（或添加，如果此編號尚不存在）。 在這種情況下，以下代碼可能適合您：

 const arr1 = [{"OwnershipNumber": 0,"ID": null,"Name": "Contractor LLC","ContrEmployeeTypeId": 0,"ContactEmail": "","ContactPhone": "","VeteranEmployeeMilitaryAffiliation": "","SocialSecurityNumber": "","DrivingLicense": "","DateOfBirth": null,"OwnershipPercentage": 0,"IsContractorActive": "Y","VeteranFlag": "N","VeteranEmployeeHireDate": null,"LegalIssueFlag": "N","ActiveFlag": true,"TimeStamp": null},{"OwnershipNumber": 1878,"ID": null,"Name": "Greg Dawson","ContrEmployeeTypeId": 2,"ContactEmail": "pra@abc.com","ContactPhone": "455-455-6444","VeteranEmployeeMilitaryAffiliation": null,"SocialSecurityNumber": "454534245","DrivingLicense": "44524245","DateOfBirth": "11/30/1968 12:00:00 AM","OwnershipPercentage": 100,"IsContractorActive": "Y","VeteranFlag": "N","VeteranEmployeeHireDate": null,"LegalIssueFlag": "N","ActiveFlag": true,"TimeStamp": null}]; const arr2 = [ {"OwnershipNumber": 1878, "ContactPhone": "111-222-6444"},{"OwnershipNumber": null,"ID": 3,"SocialSecurityNumber": "465464654","DrivingLicense": "464654654654","DateOfBirth": "1998-12-12T18:30:00.000Z","VeteranEmployeeHireDate": "1970-01-01T00:00:00.000Z","Name": "Tom Hanks","ContrEmployeeTypeId": 1,"IsContractor": "N","ContactEmail": "tom@gmail.com","ContactPhone": "564-465-4654","OwnershipPercentage": 100}]; arr2.forEach(t => { for(const [idx, obj] of arr1.entries()){ if(obj.OwnershipNumber === t.OwnershipNumber) { // The object exist in arr1, need to update the existing object arr1[idx] = {...arr1[idx], ...t}; return; } } // The object not already exist. we should add it to the array arr1.push(t); }); console.log(arr1);

Answer 2

必須有一個unique key才能對您的數據進行分組。 在這里，我認為它可以OwnershipNumber您的唯一密鑰。 現在找到解決方案，我們可以使用reduce()對數據進行分組：

 const arr1 = [{"OwnershipNumber": 0,"ID": null,"Name": "Contractor LLC","ContrEmployeeTypeId": 0,"ContactEmail": "","ContactPhone": "","VeteranEmployeeMilitaryAffiliation": "","SocialSecurityNumber": "","DrivingLicense": "","DateOfBirth": null,"OwnershipPercentage": 0,"IsContractorActive": "Y","VeteranFlag": "N","VeteranEmployeeHireDate": null,"LegalIssueFlag": "N","ActiveFlag": true,"TimeStamp": null},{"OwnershipNumber": 1878,"ID": null,"Name": "Greg Dawson","ContrEmployeeTypeId": 2,"ContactEmail": "pra@abc.com","ContactPhone": "455-455-6444","VeteranEmployeeMilitaryAffiliation": null,"SocialSecurityNumber": "454534245","DrivingLicense": "44524245","DateOfBirth": "11/30/1968 12:00:00 AM","OwnershipPercentage": 100,"IsContractorActive": "Y","VeteranFlag": "N","VeteranEmployeeHireDate": null,"LegalIssueFlag": "N","ActiveFlag": true,"TimeStamp": null}]; const arr2 = [ {"OwnershipNumber": 1878, "ContactPhone": "111-222-6444"},{"OwnershipNumber": null,"ID": 3,"SocialSecurityNumber": "465464654","DrivingLicense": "464654654654","DateOfBirth": "1998-12-12T18:30:00.000Z","VeteranEmployeeHireDate": "1970-01-01T00:00:00.000Z","Name": "Tom Hanks","ContrEmployeeTypeId": 1,"IsContractor": "N","ContactEmail": "tom@gmail.com","ContactPhone": "564-465-4654","OwnershipPercentage": 100}]; var result = Object.values([...arr1, ...arr2].reduce((acc, {OwnershipNumber, ...rest})=>( acc[OwnershipNumber] = {...(acc[OwnershipNumber] || {}), ...{OwnershipNumber, ...rest}}, acc ),{})); console.log(result);