Remove Duplicates Array Values using Javascript

Learn how to Remove Duplicates Array Values using Javascript

Published March 13, 2020

Remove Duplicates Array Values using ES5
Remove Duplicates Array Values using ES6

Remove Duplicates Array Values using ES5

Using ECMAScript 5 we can use the filter method of an Array to get an array with absolutely unique values.


  function getUnique(value, index, self) {
      return self.indexOf(value) === index;
  }

  //let myList = ['sam','ram', 'sam', 'dam', 'game', 'game']
  var myList = [ 2, 4, 6, 6, 8, 8, 10 ];
  var uniqueList2 = myList.filter( getUnique );

  console.log( uniqueList);

Remove Duplicates Array Values using ES6

ES6 which was introduce in 2015 has a new data structure called “Set”. Set data structure store unique values. To get an array with unique values we can use following code.


  const myList2 = [ 2, 4, 6, 6, 8  ];

  const uniqueList = [...new Set(myList2)]

  console.log( uniqueList);