JAVASCRIPT

how to find unique elements in array in javascript

let a = ["1", "1", "2", "3", "3", "1"];
let unique = a.filter((item, i, ar) => ar.indexOf(item) === i);
console.log(unique);

get unique numbers of an array in javascript using for loop

var array = [3,7,5,3,2,5,2,7];

for(var i=0;i<array.length;i++) {
    for(var j=i+1;j<array.length;j++) {
        if(array[i]===array[j]) {
            array.splice(j,1);
        }
    }
}
console.log(array); // output = [3,7,5,2]
 Run code snippet

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']