On 12/25/10, Garrett Smith <dhtmlkitc...@gmail.com> wrote:
> On 12/25/10, Yu-Hsuan Lai <rainco...@gmail.com> wrote:
>> Will closure create references to every object outer even when I don't
>> explicitly use them?
>>
>> example:
>> function outer () {
>> var div = document.createElement("div");
>> function inner() {
>> var a,b,c.... and do something blahblah without div;
>> }
>> outer = inner();
>> return inner;
>> }
>>
>> In this case, I still have a memory leak?
>>
> Yes, you do. But what are you doing there?
>
> You assigning `outer` to be the *result* of `inner`, and then return
> `inner`, from `outer`. This will result in outer being called the
> first time, returning the inner function. The second call to `outer`
> will result in a call to the return value for inner. SInce inner
> returns undefined, it means that `outer` is now holding value
> `undefined`. Calling `undefined` MUST result in TypeError
>
> For example, with eval:
>
[snip code]
I should have omitted that first function. I copy'n'pasted Yu's
example and then noticed a problem and fixed it, then decided to
mention about the odd problem but did not delete it.
I accidentally sent the email message with a combination of
keystrokes. I don't know what those keystrokes were; I was typing and
then all of a sudden, the page in gmail loaded. I may have tabbed to
send, or I'm not sure what I did.
But this example was the right one.
>
> function outer(s) {
> var div = document.createElement("div");
> function inner() {
> // do something without div;
> return eval(s);
> }
> outer = inner;
> return inner(s);
> }
>
And the question that follows it -- and really everything else in my
msg looks right.
--
Garrett
--
To view archived discussions from the original JSMentors Mailman list:
http://www.mail-archive.com/jsmentors@jsmentors.com/
To search via a non-Google archive, visit here:
http://www.mail-archive.com/jsmentors@googlegroups.com/
To unsubscribe from this group, send email to
jsmentors+unsubscr...@googlegroups.com
