Как получить первый повторяющийся объект из массива объектов?

const result = [
  {ProductName: "Orange", Origin: "Italy"},
  {ProductName: "Orange", Origin: "Italy"},
  {ProductName: "Lemon",  Origin: "Spain"},
  {ProductName: "Avocado",Origin: "Chile"},
  {ProductName: "Orange", Origin: "Italy"}
];

function getDuplicatesOrAll(arr) {
  const duplicates = arr
    .reduce((acc, p, i) => {
      const isDuplicate = i !== result.findIndex(({ProductName}) => ProductName === p.ProductName);
      if (isDuplicate) {
        const wasAlreadyMet = acc.some(({ProductName}) => ProductName === p.ProductName);
        if (!wasAlreadyMet) {
          acc.push(p);
        }
      }
      return acc;
    }, []);
    
  return duplicates.length ? duplicates : arr;
}

console.info( getDuplicatesOrAll(result) );

const result = [
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Lemon', Origin: 'Spain' },
  { ProductName: 'Avocado', Origin: 'Chile' }
];

function duplicateFinder(array){
  const cache = {};
  const duplicates = {};
  let endResult = [];
  array.forEach(e=>{
    cache[e.Origin]?
      duplicates[e.Origin] = e:
      cache[e.Origin] = true;
  })
  Object.keys(duplicates).forEach(e => {
      endResult.push(duplicates[e])
  })
  return endResult.length ? endResult : array;
}

console.info(duplicateFinder(result))

const result = [
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Lemon', Origin: 'Spain' },
  { ProductName: 'Avocado', Origin: 'Chile' },
];

const getDups = (arr) => {
  const seen = new Set
  const dups = arr
    .filter((o1, i)=> arr.slice(i+1)
                          .some(o2 => o1.ProductName === o2.ProductName &&
                                      o1.Origin === o2.Origin)           
                       &&      
                      !arr.slice(0, i)
                         .some(o2 => o1.ProductName === o2.ProductName &&
                                      o1.Origin === o2.Origin));
  if (dups.length){
    return dups;
  }
  return arr;
}

console.info(getDups(result));

const result = [
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Orange', Origin: 'Italy' },
  { ProductName: 'Lemon', Origin: 'Spain' },
  { ProductName: 'Avocado', Origin: 'Chile' },
];
let ret = result
  .sort((x, y) => x.ProductName.localeCompare(y.ProductName))
  .filter((x, i, a) => i > 0 && x.ProductName === a[i - 1].ProductName);
if (!ret.length) ret = result;
console.info(ret);

const result=[{ProductName:"Orange",Origin:"Italy"},{ProductName:"Orange",Origin:"Italy"},{ProductName:"Lemon",Origin:"Spain"},{ProductName:"Avocado",Origin:"Chile"}];

const findDuplicates = (arr)  => { 
    let result =[]
    arr.forEach((e,i) => {
        let slice = arr.slice(i+1)
        let dupl = slice.find(n => (n.ProductName === e.ProductName) && (n.Origin === e.Origin))
        if (dupl){
             if (!result.find(n => (n.ProductName === dupl.ProductName) && (n.Origin === dupl.Origin))){
            result.push(dupl)
            }
        }    
    })
    return result
}

console.info(findDuplicates(result))