JAVASCRIPT

JavaScript remove duplicate items

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

// usage example:
let a = ['a', 1, 'a', 2, '1'];
let unique = a.filter(onlyUnique);

console.log(unique); // ['a', 1, 2, '1']

remove duplicates javascript

function withoutDuplicates (arr) {
  return [...new Set(arr)];
}

remove duplicate Array

let Arr = [1,2,2,2,3,4,4,5,6,6];

//way1
let unique = [...new Set(Arr)];
console.log(unique);

//way2
function removeDuplicate (arr){
	return arr.filter((item,index)=> arr.indexOf(item) === index);
}

removeDuplicate(Arr);

Remove Array Duplicate

const removeDuplicates = (arr) => [...new Set(arr)];

console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6]));
// Result: [ 1, 2, 3, 4, 5, 6 ]

remove duplicate Node

/* amethod to use in class LinkedList
to remove duplicate node*/
        removeDuplicate() {

            if (this.head) {
                let current = this.head;
        while (current.next != null) {
            if (current.value == current.next.value)
                current.next = current.next.next;
            else
                current = current.next;
        }
    }
        return this;
    }