JSFiddle - React, Tailwind, and code Playground

by Hilarius Doren

JavaScript

function getFirstUniq(arrInt){
    return arrInt.filter(function(value) {
        return arrInt.indexOf(value) === arrInt.lastIndexOf(value);
    })[0] || null;
}

var list = [22, 25, 3, 3, 1, 2, 0, 22]
console.log(getFirstUniq(list));