自我调用函数变体

Question

这两个功能是否相同？ （见最后的括号）

<div ng-prevent-navigation="vm.pageShouldBeReloaded"
     ng-prevent-navigation-text="Payment form has unsaved changes. 
        If you leave the page now you will lose those changes."
></div>

和

(function () {
  alert('hi');
}());