[Biococoa-dev] Caching the NSArray of BCSymbol

[Koen van der Drift]

On Jul 6, 2005, at 1:44 PM, Charles Parnot wrote:

> Then, we should only cache it in one place: the accessor. Though for 
> mutable sequences, we also need to remember to set the cached array to 
> nil after modifications. Something like this:
>
> - (NSArray *)symbolArray
> {
>     if ( cachedArray == nil ) {
>         cachedArray = ...  //generate the array (and retain it)
>     }
>     return cachedArray;
> }
>
> - (void)emptyCache
> {
>     [cachedArray release];
>     cachedArray = nil;
> }
>
> - (void)appendSequence:(BCSequence *)otherSequence
> {
>     //code to append the sequence
>     ...
>     //empty the cache: the array is not valid anymore!!
>     [self emptyCache];
> }
>
>
> what do you think?
>


Looks like a good start to me :)  Maybe we can write the code in such a 
way that the BCSequence can be a delegate of another object (eg a 
view).


- Koen.