Hi,

I use an associative array as cache:

void clearCache() {

char[][] keys = cache.keys;
for (int i = 0; i < keys.length; i++)
delete cache(keys[i]);
}

Is there a faster way to clear the cache?


Thanks Gerd

Does dup not work on associative arrays.

If iy does (I am on my mac), one could create a static associative array (empty) and then assuming cache is an ivar.

cache = BasicArray.dup();

or

class
{
	char[char[]] cache;

	void clearCache () {
		char[char[]] dummyCache;
		cache = dummyCache;
	}
}

this will only work if cache is an ivar, not for arguments passed to methods.

or something similiar would seem to be the right approach.

Reassigning the reference removes it as a strong root for GC and thus allows the elements to be collected if not referenced elsewhere.

Of course I could be absolutely wrong.

hope that helps

Justin

Gerd Janssen wrote:

> Hi,
> 
> I use an associative array as cache: 
> 
> void clearCache() {
> 
> char[][] keys = cache.keys;	
> for (int i = 0; i < keys.length; i++)
> delete cache(keys[i]);
> }
> 
> Is there a faster way to clear the cache?
> 
> 
> Thanks Gerd
> 
> 

Clearly, associative arrays should have a clear() method. I'm surprised that
they don't


"Gerd Janssen" <Gerd_member@pathlink.com> wrote in message news:bm35la$290l$1@digitaldaemon.com...
> Hi,
>
> I use an associative array as cache:
>
> void clearCache() {
>
> char[][] keys = cache.keys;
> for (int i = 0; i < keys.length; i++)
> delete cache(keys[i]);
> }
>
> Is there a faster way to clear the cache?
>
>
> Thanks
> Gerd
>
>

I think you only need to set it to null.
cache = null;


"Gerd Janssen" <Gerd_member@pathlink.com> wrote in message news:bm35la$290l$1@digitaldaemon.com...
> Hi,
>
> I use an associative array as cache:
>
> void clearCache() {
>
> char[][] keys = cache.keys;
> for (int i = 0; i < keys.length; i++)
> delete cache(keys[i]);
> }
>
> Is there a faster way to clear the cache?
>
>
> Thanks
> Gerd
>

That's not clearing the aa, that's "deleting" the instance. The two are separate.

It's important, because you may have shared references to the same aa, and wish to empty it. If you delete/replace the instance in one part, all the others will still point to the old, non-empty, instance.

"Vathix" <vathix@dprogramming.com> wrote in message news:bm4k9f$13jr$1@digitaldaemon.com...
> I think you only need to set it to null.
> cache = null;
>
>
> "Gerd Janssen" <Gerd_member@pathlink.com> wrote in message news:bm35la$290l$1@digitaldaemon.com...
> > Hi,
> >
> > I use an associative array as cache:
> >
> > void clearCache() {
> >
> > char[][] keys = cache.keys;
> > for (int i = 0; i < keys.length; i++)
> > delete cache(keys[i]);
> > }
> >
> > Is there a faster way to clear the cache?
> >
> >
> > Thanks
> > Gerd
> >
>
>