What Ruby Doesn't Have

• The pre- and post-increment and decrement operators
  
• Two's complement arithmetic
  
• Constant constants (it's ALWAYS possible to modify or unfreeze frozen objects)
  
• Declaring any arbitrary variable constant
  
• Overriding of the assignment operator

Otherwise, I really like Ruby.

However, I think I love Objective-C even more. We basically learned it in a day, and it's surprisingly very intuitive and easy to use! Apple, you continue to make me a happy programmer.