JSFiddle - React, Tailwind, and code Playground

by Olayinka Otuniyi

JavaScript

function firstNonRepeatedCharacter(string) {
    for (var i = 0; i < string.length; i++) {
        var c = string.charAt(i);
        if (string.indexOf(c) == i && string.indexOf(c, i + 1) == -1) {
            return c;
        }
    }
    return null;
}

var someString = 'aabcbd';
alert(firstNonRepeatedCharacter(someString));