From: "Florian Groß" <florgro@...>
Date: 2005-07-15T22:17:38+09:00
Subject: Re: Difference between Class.new and class

Robert Klemme wrote:

> A disadvantage of the latter approach is that you cannot define methods 
> that receive a block.  There is no equivalent (yet) for "def foo(&b) 
> b.call(1) end" with define_method, because you cannot do 
> define_method(:foo) {|&b| b.call(1)}.  Also, you cannot have default 
> values for method arguments with define_value.  The bottom line is: use 
> the block form only if you need anonymous classes or have to otherwise.  

But you can use def in Class.new blocks:

Bar = Class.new do
   def two_times(&block)
     2.times(&block)
   end
end

Bar.new.two_times { puts "Hello World!"}

This is on 1.8.2.