const data = ['car', 'car', 'truck', 'truck', 'bike', 'walk', 'car', 'van', 'bike', 'walk', 'car', 'van', 'car', 'truck', 'pogostick']; const transportation = data.reduce((total, item) => { if(!total[item]){ total[item] = 0 } total[item]++ return total },{}) console.log(transportation)