How do I find out how many times a function is called with javascript/jquery?

Question

Perhaps an odd question but here it goes: I have a function which I call periodically and within that function I need to know which iteration I\'m in, or how many times the

Answer 1

A static variable is cleaner and it won't pollute your outer scope either, compared to a closure or a decorator as in other answers.

var foo = function(){
    alert( ++foo.count || (foo.count = 1) );
}


// test
function callTwice(f){ f(); f(); }
callTwice(foo)                  // will alert 1 then 2

or

callTwice( function bar(){           
    alert( ++bar.count || (bar.count = 1) );
});                             // will alert 1 then 2

the second one is a named anonymous function. And note this syntax:

var foo = function bar(){ /* foo === bar in here */ }