Array ForEach Method

    // Array forEach loop – affects and changes our original Array
    let dwarves = ['Bifur', 'Bofur', 'Bombur', 'Fili', 'Kili', 'Oin', 'Gloin', 'Thorin', 'Balin', 'Dwalin', 'Nori', 'Dori'];
    // convert all the names to lowercase except Thorin
    // and console.log them
    // anonymous function
    
    dwarves.forEach(function (item, index, array){ 
        if (item === 'Thorin'){
            item = item.toUpperCase;
        } else {
            Item = item.toLowerCase; 
        }
    });
    console.log(index, item);