[Biococoa-dev] BCSequenceRecord

Alexander Griekspoor mek at mekentosj.com
Sun Jul 10 04:16:48 EDT 2005

On 10-jul-2005, at 2:16, Koen van der Drift wrote:
> I like the NSData approach. So if we go for NSMutableData, we will  
> have mutable sequences, correct? Are we aso going to add immutable  
> sequences?

Here I am not sure, John had clear opinions in the past about this as  
far as I can recall. The "problem" is in the subclasses design.  
Ideally a mutable sequence object would be either a subclass of the  
immutable one which adds the editing possibilities, or we do  
something alike NSString vs NSMutableString class cluster approach  
(of which I don't know much, but I believe Charles or Phil can tell  
more.). Anyway, I would have no problem to make the public method  
return an NSData but the private property be an NSMutableData, also  
for the immutable sequence. But if there is a way to have the  
immutable bcsequence have an NSData property and the mutable version  
have an NSMutableData then that would be more elegant obviously...

                     ** Alexander Griekspoor **
               The Netherlands Cancer Institute
               Department of Tumorbiology (H4)
          Plesmanlaan 121, 1066 CX, Amsterdam
                   Tel:  + 31 20 - 512 2023
                   Fax:  + 31 20 - 512 2029
                   E-mail: a.griekspoor at nki.nl
             AIM: mekentosj at mac.com
               Web: http://www.mekentosj.com

                  EnzymeX - To cut or not to cut


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