Remove duplicate elements and take one element from two array

Question

I have two arrays below,

let array_one = [1, 2, 3, 4, 5]; //first array
let array_two = [5, 6, 7, 8, 9]; //second array

//I need [1, 2, 3, 4, 5, 6, 7, 8, 9]

In array_one and array_two has one common element that is 5 but I need this 5 only one time. I don't need to remove the duplicate elements but need one single element.

That the data comes from two arrays isn't really relevant; methodology is the same. — Dave Newton, May 21 '20 at 13:58
See also [How to merge two arrays in JavaScript and de-duplicate items](https://stackoverflow.com/q/1584370/215552) — Heretic Monkey, May 21 '20 at 13:59
Thanks. I searched for it but I don't know why I didn't find it. — Tahazzot, May 21 '20 at 14:01
Check this : function onlyUnique(value, index, self) { return self.indexOf(value) === index; } let arr = [...array_one,...array_two]; arr.filter(onlyUnique); — Harmandeep Singh Kalsi, May 21 '20 at 14:03

score 0 · Accepted Answer · answered May 21 '20 at 14:01

0

Please try this, It should work for you

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

    let arr = [...array_one,...array_two];

arr.filter(onlyUnique);

answered May 21 '20 at 14:01

Harmandeep Singh Kalsi

3,315
2
14
26

Remove duplicate elements and take one element from two array

1 Answers1