JavaScript_Succinctly

Sample: sample84.html
var foo = function foo() {
console.log(arguments.callee); // Logs foo()
// callee could be used to invoke recursively the foo function (e.g.,
arguments.callee())
} ();
This can be useful when a function needs to be called recursively.
The function instance length property and arguments.length
The arguments object has a unique length property. While you might think this length
property will give you the number of defined arguments, it actually gives the number of
parameters sent to the function during invocation.
Sample: sample85.html
var myFunction = function (z, s, d) {
return arguments.length;
};
console.log(myFunction()); // Logs 0 because no parameters were passed to
the function.
Using the length property of all Function() instances, we can actually grab the total
number of parameters the function is expecting.
Sample: sample86.html
var myFunction = function (z, s, d, e, r, m, q) {
return myFunction.length;
};
console.log(myFunction()); // Logs 7.
95