Self executing function passing object after condition

Question

I have come across a self executing function that executes on a condition that the declared containing var exists, and if it doesn\'t exist it is passed an object.

Exam

Answer 1

var myFunc = (function(myFunc){}(myFunc||{}));

This doesn't make any sense because the myFunc Argument will always be {} - I'm confused by that.

Ill explain one that does

First Example

var cool = {
   person: 'john'
};

(function( Argument ){
  console.log( Argument ); // Result Object {person: "john"} 
}( cool || {} ));

In this example cool is defined and is a object so it wont go past the ||

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Next example

var cool;
(function( Argument ){
  console.log( Argument ); // Result Object {}
}( cool || {} ));

In this example cool is defined But the defualt value for a variable is undefined so in this case it is undefined so Argument is a Object instead