From: Brian Candler <b.candler@...>
Date: 2010-09-24T04:50:22+09:00
Subject: Re: Defining a class without opening an existent one

Hagbard Celine wrote:0
> I want to define a class which happens to have the same name as a
> builtin class. It shouldn't be a problem because it's in an extra
> namespace, but Ruby opens the existing class instead of defining a new
> one. Here's an example:
> 
> module MyNamespace
>   class Array
>     # Some stuff
>   end
> end

That's fine. What makes you think that this didn't create a separate 
class?

> I tried using the full qualifier (class MyNamespace::Array) but it
> didn't help.

In what way didn't it help? Did you get an error message? Post your full 
code and the exception.

> Is there a possibility to actually define a new class?

Sure, you've just done it :-)

>> module MyNamespace; class Array; end; end
=> nil
>> Array.object_id
=> 70098182563360
>> MyNamespace::Array.object_id
=> 70098182326040
>> a = MyNamespace::Array.new
=> #<MyNamespace::Array:0x7f820281f520>
>> a[1]
NoMethodError: undefined method `[]' for 
#<MyNamespace::Array:0x7f820281f520>
  from (irb):5
  from :0
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