farhadf questions

• Can you override a method by including a module? [duplicate]
• Why are instance variables defined in the header file in Objective-C
• How to inherit from NSDictionary?
• Can you override an aliased method in Ruby?
• In Ruby why won't `foo = true unless defined?(foo)` make the assignment?
• Why can't you change a UIView background color in drawRect?
• How do I get Ruby to parse time as if it were in a different time zone?

farhadf answers