Get list of duplicate objects in an array of objects

Question

I am trying to get duplicate objects within an array of objects. Let\'s say the object is like below.

values = [
  { id: 10, name: \'someName1\' },
  { id: 1         


        

Answer 1

Try this

function checkDuplicateInObject(propertyName, inputArray) {
  var seenDuplicate = false,
  testObject = {};

  inputArray.map(function(item) {
  var itemPropertyName = item[propertyName];    
  if (itemPropertyName in testObject) {
  testObject[itemPropertyName].duplicate = true;
  item.duplicate = true;
  seenDuplicate = true;
 }
 else {
   testObject[itemPropertyName] = item;
   delete item.duplicate;
 }
});

 return seenDuplicate;
}

referred from : http://www.competa.com/blog/lets-find-duplicate-property-values-in-an-array-of-objects-in-javascript/