One Quickie

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Minimal KVC accessors for arrays (Bindings->General)

For an attribute named "layers", here are the KVC accessors to write to let observers react to object addition and removal:

- (NSArray *) layers
{
    return (layers);
} // layers


- (void) insertObject: (id) obj
      inLayersAtIndex: (unsigned) index
{
    [layers insertObject: obj  atIndex: index];
} // insertObjectInLayers


- (void) removeObjectFromLayersAtIndex: (unsigned) index
{
    [layers removeObjectAtIndex: index];
} // removeObjectFromLayersAtIndex