Thanks a lot for open sourcing Color Picker Pro, I think it's an awesome utility. As for the calculator, it nice to see a different approach to a simple proble

Thanks a lot for open sourcing Color Picker Pro, I think it's an awesome utility. As for the calculator, it nice to see a different approach to a simple problem. There is, however, a line of code missing from the :buttonPressed function. For the case of kButtonSubtract, it needs to set deleteInput to YES. Thanks for the awesome Cocoa contributions. Please, keep it up.