From: Kedar Mhaswade <kedar.mhaswade@...>
Date: 2011-01-07T04:45:41+09:00
Subject: Re: Class Initialization?

Brian Candler wrote in post #972835:
> Kedar Mhaswade wrote in post #972556:
>> It was not clear if the "class body" will be executed at most once.
>> That's now clear.
>
> And indeed, the execution of the code is what defines the class. The
> class and methods are defined *at runtime*.
>
> Foo.bar rescue nil     # uninitialized constant Foo
> class Foo
>   def self.bar
>     puts "hello!"
>   end
> end
> Foo.bar                # this works
>
> Amongst other things, this means you can conditionally define classes
> and methods.
>
> However the code will be executed multiple times if you force it to be -
> for example using 'load' instead of 'require'. This can also happen if
> you require the same file using variations of the name, e.g.
>
> require 'foo'
> require './foo'
> require '/path/to/foo'

Brian,

Interesting. So, the initialization is that of a file and not a class? I 
thought no matter how some ruby code "requires" a class defined 
elsewhere, the class initialization will be done at most once.

Thanks for the hint.

-Kedar

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