Hi Zentara, Thanks for all your posts. Let me make my requirement very simple. Forget about object oriented programming a also whether B.pm is derived from Tk::Tree or not. Just think about procedural programming. I just need to build the logic where the called function (i.e getItemStyle )can stringify the passed parameter set and make them the key of a hash. The value of the hash shoud be the created ItemStyle object. I am trying to write the pseudocode below : 


 &getItemStyle($tree, 'text', -anchor => 'w',-fg => 'red');


sub getItemStyle 
{

   my $obj =  shift;  ## holds $tree
   my $type = shift;  ## holds text
   ## Now stringify the "-anchor =>'w' -fg => 'red'
   ## and make them a hash key and create the ItemStyle.
   ## So that next time if I call getItemStyle with same
   ## same parameters(-anchor and -fg ), it does not create
   ## the ItemStyle all over again and checks the hash if 
   ## the paramters exist as a key then returns its value. 
   ## Also we need to sort the parameters so that if we 
   ## cal getItemStyle with the same two parameters and 
   ## reverse the order of mentioning them (-fg => red , 
   ## -anchor =>'w') , it considers it as the same call 
   ## as (-anchor => 'w', -fg =>red) happened earlier .

[download]

Hope the problem is clear now. Main thing is to elegantly and easily stringify the parameters, use them as a hash key, store the object in the value corresponding to that key and return. If it is a new parameter set, then make a new key and create the itemstyle.

In reply to Re^4: ItemStyle causing high memory consumption by ghosh123
in thread ItemStyle causing high memory consumption by ghosh123

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