array of objects how to check if property has duplicate

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1var yourArray = [
2
3{Index: 1, Name: "Farley, Charley", EmployeeCode: "12", PaymentType: "Void", CheckDate: "01/04/2012"},
4{Index: 2, Name: "Farley, Charley", EmployeeCode: "12", PaymentType: "Void", CheckDate: "01/04/2012"},
5{Index: 3, Name: "Tarley, Charley", EmployeeCode: "12", PaymentType: "Void", CheckDate: "01/04/2012"}
6];
7
8   unique = [...new Set(yourArray.map(propYoureChecking => propYoureChecking.Name))];
9if (unique.length === 1) {
10console.log(unique);
11}

1
2const arrayOfObjCopy = [...arrayOfObj];
3
4Object.keys(arrayOfObjCopy).forEach((key) => {
5  arrayOfObjCopy[key] = JSON.stringify(arrayOfObjCopy[key]);
6 });
7
8const arrayOfObjhasDuplicates = uniq(arrayOfObjCopy).length != arrayOfObjCopy.length;
9

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