Handling exceptions in mapped function

tryo.js

function tryo(fn) {
  var res = null;
  try {
    res = fn();
  } catch (e) {
    res = null;
  }
  return maybe(res);
}

function thrower(x) {
  if (x == 2) throw new Error("An exception");
  return x;
}

console.log([1, 2, 3].map(function (i) {
  return tryo(function () { return thrower(i) }).getOrElse("fail");
}));