if object has duplicates return value once

array of objects how to check if property has duplicate

var yourArray = [

{Index: 1, Name: "Farley, Charley", EmployeeCode: "12", PaymentType: "Void", CheckDate: "01/04/2012"},
{Index: 2, Name: "Farley, Charley", EmployeeCode: "12", PaymentType: "Void", CheckDate: "01/04/2012"},
{Index: 3, Name: "Tarley, Charley", EmployeeCode: "12", PaymentType: "Void", CheckDate: "01/04/2012"}
];

   unique = [...new Set(yourArray.map(propYoureChecking => propYoureChecking.Name))];
if (unique.length === 1) {
console.log(unique);
}

Posted by: Guest on May-20-2020

export const findDuplicate = (data: Record<string, any>[]): number[] => { const duplicates: number[] = data .filter((item: Record<string, any>, index: number) => index !== data.findIndex((v: Record<string, any>) => v.order_id === item.order_id)) .map((val: Record<string, any>) => val.id) return duplicates }

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