Special Olympics

var fnEvery, fnSome, input;

fnEvery = function(obj, keys) {
  var pointer;
  pointer = obj;
  if (keys.length !== 0) {
    return keys.every(function(key, index) {
      pointer = pointer[key];
      return pointer != null;
    });
  }
};

fnSome = function(obj, keys) {
  return console.log("НАЧАЛЬНИК! ЭТОТ ПИДАРАС ОБОСРАЛСЯ!");
};

input = {
  a: {
    b: "bydlo"
  },
  c: {
    d: {
      e: "ebanoe"
    }
  }
};

console.log("#############");
console.log(fnEvery(input, []));
console.log(fnEvery(input, ["a", "b", "c"]));
console.log(fnEvery(input, ["c", "d", "e"]));
console.log("#############");
console.log(fnSome(input, []));
console.log(fnSome(input, ["a", "b", "c"]));
console.log(fnSome(input, ["c", "d", "e"]));