How can I confirm in Lodash whether all properties in an array are equal even without a property to exclude?

Consider the following array of employee data:

var service = [{
        AssignedEmployeeInternalID: "8000000011",
        AssignedEmployeeUUID: "00000000-0001-1EE1-82C1-8379F1C4462E",
        BillableIndicator: true,
        BusinessPartnerFormattedName: "Sébastien Brun",
        EndDateTime: null,
        EndDatetimeZoneCode: "UTC",
        Info: "-N/A",
        InternalID: "",
        ObjectID: "00163E0E46241EE988E20C5E4033E0BE",
        ParentObjectID: "00163E0306801ED287F1C8E9CDFA9E4A",
        PeriodPlansArray: [],
        PlannedWorkQuantity: "0.00000000000000",
        PlannedWorkQuantityunitCode: "HUR",
        PlannedWorkQuantityunitCodeText: "",

    },
    {
        AssignedEmployeeInternalID: "8000000011",
        AssignedEmployeeUUID: "00000000-0001-1EE1-82C1-8379F1C4462E",
        BillableIndicator: false,
        BusinessPartnerFormattedName: "Sébastien Brun",
        EndDateTime: null,
        EndDatetimeZoneCode: "UTC",
        Info: "-N/A",
        InternalID: "",
        ObjectID: "00163E0E46241EE988E20C5E4033E0BE",
        ParentObjectID: "00163E0306801ED287F1C8E9CDFA9E4A",
        PeriodPlansArray: [],
        PlannedWorkQuantity: "0.00000000000000",
        PlannedWorkQuantityunitCode: "HUR",
        PlannedWorkQuantityunitCodeText: "",

    },
    {
        AssignedEmployeeInternalID: "8000000011",
        AssignedEmployeeUUID: "00000000-0001-1EE1-82C1-8379F1C4462E",
        BillableIndicator: true,
        BusinessPartnerFormattedName: "Sébastien Brun",
        EndDateTime: null,
        EndDatetimeZoneCode: "UTC",
        Info: "-N/A",
        InternalID: "",
        ObjectID: "00163E0E46241EE988E20C5E4033E0BE",
        ParentObjectID: "00163E0306801ED287F1C8E9CDFA9E4A",
        PeriodPlansArray: [],
        PlannedWorkQuantity: "0.00000000000000",
        PlannedWorkQuantityunitCode: "HUR",
        PlannedWorkQuantityunitCodeText: "",
    }
]

To confirm that AssignedEmployeeInternalID is consistent across all elements in the array, you can use the following approach:

result =  _.differenceBy(service, [{ 'AssignedEmployeeInternalID': service[0].AssignedEmployeeInternalID }], 'AssignedEmployeeInternalID');

If you are unsure of the value to exclude (the specific AssignedEmployeeInternalID), and want to dynamically verify that all properties are the same, you can implement a more dynamic solution.

javascriptarrayslodash

Answer №1

To easily find out if all array items have the same value for 'AssignedEmployeeInternalID', you can utilize the uniqBy method (refer to the documentation here):

var uniqueByID = _.uniqBy(service, 'AssignedEmployeeInternalID');
var allMatch = uniqueByID.length === 1;

Answer №2

To achieve this using vanilla JavaScript, you can utilize the Array every method in the following way:

var service = [{
        AssignedEmployeeInternalID: "8000000011",
        AssignedEmployeeUUID: "00000000-0001-1EE1-82C1-8379F1C4462E",
        BillableIndicator: true,
        BusinessPartnerFormattedName: "Sébastien Brun",
        EndDateTime: null,
        EndDatetimeZoneCode: "UTC",
        Info: "-N/A",
        InternalID: "",
        ObjectID: "00163E0E46241EE988E20C5E4033E0BE",
        ParentObjectID: "00163E0306801ED287F1C8E9CDFA9E4A",
        PeriodPlansArray: [],
        PlannedWorkQuantity: "0.00000000000000",
        PlannedWorkQuantityunitCode: "HUR",
        PlannedWorkQuantityunitCodeText: "",

    },
    {
        AssignedEmployeeInternalID: "8000000011",
        AssignedEmployeeUUID: "00000000-0001-1EE1-82C1-8379F1C4462E",
        BillableIndicator: false,
        BusinessPartnerFormattedName: "Sébastien Brun",
        EndDateTime: null,
        EndDatetimeZoneCode: "UTC",
        Info: "-N/A",
        InternalID: "",
        ObjectID: "00163E0E46241EE988E20C5E4033E0BE",
        ParentObjectID: "00163E0306801ED287F1C8E9CDFA9E4A",
        PeriodPlansArray: [],
        PlannedWorkQuantity: "0.00000000000000",
        PlannedWorkQuantityunitCode: "HUR",
        PlannedWorkQuantityunitCodeText: "",

    },
    {
        AssignedEmployeeInternalID: "8000000011",
        AssignedEmployeeUUID: "00000000-0001-1EE1-82C1-8379F1C4462E",
        BillableIndicator: true,
        BusinessPartnerFormattedName: "Sébastien Brun",
        EndDateTime: null,
        EndDatetimeZoneCode: "UTC",
        Info: "-N/A",
        InternalID: "",
        ObjectID: "00163E0E46241EE988E20C5E4033E0BE",
        ParentObjectID: "00163E0306801ED287F1C8E9CDFA9E4A",
        PeriodPlansArray: [],
        PlannedWorkQuantity: "0.00000000000000",
        PlannedWorkQuantityunitCode: "HUR",
        PlannedWorkQuantityunitCodeText: "",
    }
];

const allSame = service.every(el => el.AssignedEmployeeInternalID === service[0].AssignedEmployeeInternalID);

console.log(allSame);

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