ForEach Bersarang

var herbivora = new Array('kambing', 'harimau', 'ayam');
var karnivora = new Array('sapi', 'serigala', 'monyet');
var omnivora = new Array('kuda', 'anjing', 'beruang');
var binatang = new Array(herbivora, karnivora, omnivora);

  binatang.forEach(function(value)
  {
      value.forEach(function(nama, value, index)
      {
          console.log('Indeks ke-' + '[' + value + ']' + ' ada binatang '  + nama );
      });
  });