JAVASCRIPT

Variables In Self Invoking Function

let/var declared inside of a self invoking function go away outside of it. consts remain. So if you want it to disappear, use var/let. If you want it to stay, const or nothing

Return Function As Parameter For Self Invoking Function

      (function (a) {
console.log(a);
}(x()));
function x()
{
  return "XXXXX";
}   
/*console.log is XXXXX*/

Variable As Parameter In Self Invoking Function

var x = "AAAAAAA333AA";
(function (a) {
console.log(a);
}(x));
 /*x must be already defined at the time*/

Function As Parameter In Self Invoking Function

(function (a) {
a();
}(

function(a, b, c)
{

alert("aaaaa");
}


));
/*you can just think of this as "in this self invoking function, we now can use the function(a, b, c) function......in any way we see fit*/
/*notice how the parameters in the bottom function don't really matter in terms of being executed even though they are not being used at all*/