如何找出使用javascript/jquery调用函数的次数? [英] How do I find out how many times a function is called with javascript/jquery?

问题描述

也许是一个奇怪的问题，但是事情就这样了:我有一个定期调用的函数，在该函数中，我需要知道我正在执行哪个迭代，或者已调用该函数多少次.问题的简化版本:

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 function has been called. A simplified version of the problem:

jQuery( document ).ready( function(){
    setInterval( "myFunction()", 3000 );
});

function myFunction()
{
    alert( "I have been called X times" );
}

那么，如何找出上面代码中的X?

So, how do I figure out the X in the above code?

推荐答案

您可以简单地使用一个全局变量，该变量在每次调用该函数时都会增加:

You could simply use a global variable, which is increased each time you call the function:

var myFuncCalls = 0;

function myFunction()
{
    myFuncCalls++;
    alert( "I have been called " + myFuncCalls + " times" );
}

一旦您的代码变得更加复杂(或者如果您使用许多其他库)，则应该考虑使用范围，如此处其他答案所示(Vilx的一本).

As soon as your code gets a little more complex (or if you use a lot of other libraries), you should, however, consider using scoping as shown in the other answers here (best explained in the one by Vilx).

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