[amibroker] How to Skip Empty Symbols when looping through wishlist

["Paolo Cavatore" <pcavatore@xxxxxxxxx>]

Does anyone know how to skip empty symbols when looping through a 
list of them?

The code below shows that IsNull function doesn't return TRUE for 
empty symbols.

Thanks,

paolo

// EmptySymbols finder
// retrive comma-separated list of symbols
// from Group 0
list = CategoryGetSymbols(categoryGroup, 0); 

Count = 0;

   for( i = 0; ( sym = StrExtract( list, i ) ) != ""; i++ ) 
   { 
        SetForeign(sym);      
	myforeign = C;
	RestorePriceArrays();
	
	//if the symbol is empty Count is not increased
	IIf(IsNull(myforeign), Count, Count++);
        _TRACE("symbol " + sym);
        _TRACE("Count " + Count);
        _TRACE("IsNull " + IsNull(myforeign));

    }


------------------------------------

**** IMPORTANT ****
This group is for the discussion between users only.
This is *NOT* technical support channel.

*********************
TO GET TECHNICAL SUPPORT from AmiBroker please send an e-mail directly to 
SUPPORT {at} amibroker.com
*********************

For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/

For other support material please check also:
http://www.amibroker.com/support.html

*********************************
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/amibroker/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/amibroker/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:amibroker-digest@xxxxxxxxxxxxxxx 
    mailto:amibroker-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    amibroker-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/