From: nobu@...
Date: 2006-10-04T09:17:58+09:00
Subject: Re: eval confusion

Hi,

At Wed, 4 Oct 2006 08:00:32 +0900,
Paolo Negri wrote in [ruby-talk:217920]:
> #!/bin/ruby
> class DefMethod
>   M_COLLECTION = ('a'..'c')
>   M_COLLECTION.each do |alpha|
>     define_method(alpha) {
>       block_given? ? puts(yield(alpha)) : puts(alpha)

This block_given? sees the context where define_method is
called, that is defining DefMethod and always false.

>     }
>   end
> end

In 1.9, you have to write as:

>     define_method(alpha) {|&block|
>       block ? puts(yield(alpha)) : puts(alpha)
>     }

No way in 1.8.

-- 
Nobu Nakada