class Solution {

    public int singleNumber(int[] nums) {

        int n=0;

        for(int i:nums){

            n=n^i;

        }

        return n;

    }

}

// usage example:

var myArray = ['a', 1, 'a', 2, '1'];

var unique = myArray.filter((v, i, a) => a.indexOf(v) === i); 

​

// unique is ['a', 1, 2, '1']

let uniqueItems = [...new Set(items)]

const unique = (value, index, self) => {

  return self.indexOf(value) === index

}

​

const ages = [26, 27, 26, 26, 28, 28, 29, 29, 30]

const uniqueAges = ages.filter(unique)

console.log(uniqueAges)

const a = [1, 9, 2, 2, 3, 4, 1, 7, 8, 0, 9, 0, 1, 5, 3];

​

const b = a.filter(function (item, index, array) {

    return array.lastIndexOf(item) === index; // this will return the unique elements

});

​

const arr1=[1,2,3,4,5,5];

​

const unique = arr1.filter((item, index, array)=>

  array.indexOf(item)===index

)

console.log(unique)

const array = [1, 2, 3, 1, 2, 4, 5, 3, 6, 4];

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

​

console.log(uniqueElements);

// Example array

const array = [1, 2, 2, 3, 4, 4, 5, 6, 6];

​

// Using Set to get unique values

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

​

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

// app.js

​

Array.prototype.unique = function() {

  let arr = [];

  for(let i = 0; i < this.length; i++) {

      if(!arr.includes(this[i])) {

          arr.push(this[i]);

      }

  }

  return arr; 

}

​

const ages = [26, 27, 26, 26, 28, 28, 29, 29, 30]

const uniqueAges = ages.unique()

console.log(uniqueAges)

var newArray = evenNumbers.filter((value, index, self) => self.indexOf(value) === index);