Hi guys,

On page 8 of 2nd Pickaxe or when I type ri GC under a window prompt 
command I get the message 1. It looks like GC is a class. But on page 
426 and page 491 it says GC is a built-in module. Since in Ruby a module 
and a class is different. So which one is correct? Do I miss something 
in message 1?

Thanks,

Li


#############message 1

C:\>ri GC
-------------------------------------------------------------- Class: GC
     The +GC+ module provides an interface to Ruby's mark and sweep
     garbage collection mechanism. Some of the underlying methods are
     also available via the +ObjectSpace+ module.

------------------------------------------------------------------------


Class methods:
--------------
     disable, enable, start


Instance methods:
-----------------
     garbage_collect



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