How To Get Javascript Unique Array Using Filter() Method

How To Get Javascript Unique Array Using Filter() Method

The solution for how to get javascript unique array then your solution is the Javascript array filter() method. Distinct values in array in Javascript.

If you are looking for a solution for how to get a unique javascript array, then your answer is […new Set(arr)] method. The triple dot (…) is  spread operator. Primitive values in JavaScript are immutable values except for objects. Types of primitive values include  Null, Undefined, Boolean,  Number, Symbol, and  String. This tutorial also gives you the answer to the How can I get a list of unique values in Array.

Javascript Unique Array Example

To find a unique array and remove all the duplicates from the array, you can use one of the following ways.

  1. Use new ES6 feature: […new Set( [1, 1, 2] )];
  2. Use object { } to prevent duplicates
  3. Use a helper array [ ]
  4. Use filter + indexOf
  5. Define our own array unique prototype

If you have an  array of dates, then you need some more customized methods.

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