let herbivora = new Array('kambing', 'sapi', 'kuda'); let karnivora = new Array('harimau', 'serigala', 'anjing'); let omnivora = new Array('ayam', 'monyet', 'beruang'); let binatang = new Array(herbivora, karnivora, omnivora); binatang.forEach(function(jenis, i) { jenis.forEach(function(nama, index, i) { console.log('Indeks ke- ['+i+']['+index+'] ada binatang '+nama); }); });