Kesong Xie questions

• Error using 'git add': "-bash: syntax error near unexpected token `('"
• Confusion about where should put the [unowned self]
• Python: Recursive call counting ways of walking grid yield incorrect answer when grid size is too large
• why my file permission being changed after pull from git repository
• Core Data - The correct way to subclass NSManagedObject in objective-c project Xcode 8
• Comparing two identical Double value return false Swift 3

Kesong Xie answers