From: "David A. Black" <dblack@...>
Date: 2004-11-16T12:21:33+09:00
Subject: Re: Block passing

Hi --

On Tue, 16 Nov 2004, Zach Dennis wrote:

> I am curious how I can capture a block that was passed. Here's what I'm 
> trying to do:
> 
> class BaseClass
> 	def initialize( arg1 )
> 		puts "got a block" if block_given?
> 	end
> end
> 
> class SubBaseClass < BaseClass
> 	def initialize( arg1 , arg2 )
> 		super( arg1 )
> 	end
> end
> 
> sbc = SubBaseClass.new( "aarg1" , "arg2" ) { puts "my block" }
> 
> 
> I would like BaseClass to receive the block I passed to the SubBaseClass 
>   constructor. I have tried a few variations, but nothing went.

It involves '&'s:

  class BaseClass
    def initialize(arg1)
      puts "got a block" if block_given?
      yield
    end
  end
  
  class SubBaseClass < BaseClass
    def initialize(arg1, arg2, &block)
      super(arg1) &block
    end
  end
  
  sbc = SubBaseClass.new( "aarg1" , "arg2" ) { puts "my block" }


David

-- 
David A. Black
dblack@wobblini.net