array get unique values code example

Example 1: javascript array unique values

var arr = [55, 44, 65,1,2,3,3,34,5];
var unique = [...new Set(arr)]

//just  var unique = new Set(arr) wont be an array

Example 2: javascript find unique values in array

// 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']

Example 3: get only unique values from array javascript

arr = [2, 2, 2, 1, 3, 3, 3,3, 4, 5];
arr = arr.sort().filter((item,i)=>!(arr[i] == arr[i+1] || arr[i-1]==arr[i]));
// this will remove all item which are repeating more then one
console.log(arr);
// [1, 4, 5]

Example 4: how to create an array with unique values

import java.util.Random;

public class GenRandArray {
    //Recommend reseeding within methods
    static Random rand = new Random();

    public static void fillInt( int[] fillArray ) {
        //seeds the random for a new random each method call
        rand.setSeed(System.currentTimeMillis());
		
        for(int i = 0; i < fillArray.length; i++)
        {
            fillArray[i]= rand.nextInt();
            
          	/* for loop to check to make sure that none of the previous
               numbers added are the same as the one just added. */
            for (int j = 0; j < i; j++)
            {
              	/* if so we need to redo the last random number by
              	   moving i back one index to be re-set */
                if (fillArray[i] == fillArray[j])
                {
                    i--;
                }
            }
        }
    }
}

Example 5: array with unique values javascript

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

Example 6: unique elements in array javascript

var array3 = [1, 2, 4, 6, 1, 4, 9, 10, 2, 8];
function findUniqueElements_3(array) {

    for (let i = 0; i < array.length; i++) {
        for (let j = i + 1; j < array.length; j++) {
            if (array[i] == array[j]) {
                array.splice(j, 1)
            }

        }
    }
    console.log(`from third way : ${array}`);
}

findUniqueElements_3(array3)