JavaScript Advanced Knowledge Analysis--function access

The code information comes from http://ejohn.org/apps/learn/.

It can be referenced inside it by its name.

function Yell (n) {   return n > 0? Yell (n-1) + "a": "Hiy";} console.log (Yell (4) = = = "Hiyaaaa", "In the inside of the function accesses itself through its name");

How do you call yourself inside a named function when it is not declared?

var ninja = {   function(n) {     return n > 0? arguments.callee (n-1 + "A": "Hiy";   }}; Console.log (Ninja.yell (4) = = "Hiyaaaa", "Arguments.callee refers to the function itself");

The name scope of the function is invalidated.

var function Myninja () {   = = = Myninja, "the reference and name of this function is thesame function"typeof Myninja = = = "Undefined", " But not accessible outside the function " ); Console.log (ninja); // function Myninja ()

Note that when we use a named function declaration to assign to a variable, the name of the function can be referenced internally, but not externally. And the assigned variable can be referenced.

You can also call an anonymous function when it is a property of an object.

var ninja = {   function(n) {     return n > 0? ninja.yell (n-1) + "a": "Hiy";   }; Console.log (Ninja.yell (4) = = = "Hiyaaaa"); // true

Through the properties of this object, we can call it.

What happens when the original object is removed?

 var  ninja = {yell:  function   (n) { return  n > 0?   Ninja.yell (n-1) + "a": "Hiy" ; } }; Console.log (Ninja.yell ( 4) = = "Hiyaaaa"); // true  var  Samurai = {Yell:ninja.yell};  var  ninja = null    try   {Samurai.yell ( 4);  catch   (E) {Console.log ( "cannot be accessed. " 

The same thing, but what happens when we give the anonymous function a name?

var ninja = {   function  yell (n) {     return n > 0? Yell (n-1) + "a": " Hiy ";   }}; Console.log (Ninja.yell (4) = = "Hiyaaaa")  ; var samurai =var ninja = null; Console.log (Samurai.yell (4) = = "Hiyaaaa", " Note that it can still call this function ");

JavaScript Advanced Knowledge Analysis--function access