Find duplicates in array javascript

1. How to find duplicates in array in JavaScript?
2. How do you find duplicates in arrays?
3. How to filter duplicates in array JavaScript?

How to find duplicates in array in JavaScript?

Using the filter() and indexOf() Methods

This is the shortest and the easiest way of finding duplicates in an array, where the filter() method traverses the array and filters items according to the defined condition and returns a new array, while the indexOf() gives the index of the passed item.

How do you find duplicates in arrays?

The standard way to find duplicate elements from an array is by using the HashSet data structure. If you remember, Set abstract data type doesn't allow duplicates. You can take advantage of this property to filter duplicate elements.

How to filter duplicates in array JavaScript?

To remove this, you can use several functions such as filter(), set(), reduce(), forEach(), and indexof() method. Using these functions, you can remove duplicates from JavaScript arrays.