Egor95

window.onload = function() {
    // var m=[4, 12, 'hello'];
   // console.log( m ) 
  var m = {};
  var n = {
      "one" : 12,
      "hello" : "world",
      "prim" : 2000,
      "double key" : 777
  };
  n.one = 9000;
  // console.log(n['prim']);
  // console.log(n.one);
  // console.log(n.double key); //ошибка
  console.log( n['double key'] );
  var ppp = 'hello';
  // n.ppp //ошибка
  console.log( n[ppp] );
  var out = document.getElementById('out');
  for (var key in n) {
      out.innerHTML += key + '<br> ';
  }
};