Write a function to remove duplicate elements from an array.

Question

Accepted Answer

Remove duplicate elements from an Array

Use the Set object to remove duplicate elements
Convert the Set back to an array using the spread operator
If the array contains objects, use a custom comparison function

Accepted Answer

const array = [1, 2, 3, 2, 4, 1, 5];

const uniqueArray = [...new Set(array)];

console.log(uniqueArray);

Accepted Answer

var arr=[2,3,6,2,5,3.4,6,5];

var res=[];

arr.filter((v)=>{if(!res.includes(v)){

res.push(v);

}})

console.log(res);

Accepted Answer

This question has been asked to me in at least 4-5 interviews. This can be done in several way. The most efficient way being, Create a new "Set" from the existing array. This is an es6 functionality. A set will not contain any duplicate value. Don't forget to add spread operator to the set to create a new array. You can read more about this.   Second way you can use a "Filter" method to filter out the duplicates. These are the two ways I had mentioned during the interview.

Write a function to remove duplicate elements from an array.

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