Michael Buckley questions

Michael Buckley answers

• Obj-C: Class methods vs instance methods -- efficiency difference?
• Mapping pixel formats from CVPixelBuffer to their equivalent V4L
• Java Developer meets Objective-C on Mac OS
• mouseExited isn't called when mouse leaves trackingArea while scrolling
• Sending a message to nil in Objective-C
• #if directive graying out the inactive branch in XCode