用箭头函数重写

用箭头函数重写下面的函数表达式：

function ask(question, yes, no) {
  if (confirm(question)) yes();
  else no();
}

ask(
  "Do you agree?",
  function() { alert("You agreed."); },
  function() { alert("You canceled the execution."); }
);

function ask(question, yes, no) {
  if (confirm(question)) yes();
  else no();
}

ask(
  "Do you agree?",
  () => alert("You agreed."),
  () => alert("You canceled the execution.")
);

是不是看起来精简多了？