bbum questions

bbum answers

• How can a copy of an instance of an object be made for a class which does not adopt NSCopying?
• executing NSTask in the background
• Core Data with multiple sqlite files
• Crash when object deallocated while running a background thread
• How to avoid/evade garbage-collection bug resulting in NSClipViewBackingLayer being over-retained
• Instruments show memory leak - Xcode 5 / iOS7
• Extending existing classes by adding instance variables
• Memory management - finding bugs earlier
• Is `super` local variable?
• Blocks and messaging