From: daniel <daniel@...>
Date: 2006-12-11T07:30:10+09:00
Subject: Re: Scope of block


Gustav Paul schreef:

> The following seems to work:
> #########
> class BlockTest
>   def process(&block)
>     @block=block
>   end
>
>   def myblock
>     instance_eval{@block}.call
>   end
> end
>
> out_of_scope_var = "out of scope, me"
> t = BlockTest.new
> t.process {"var = #{out_of_scope_var}"}
>
> p t.myblock
> #=> "var = out of scope, me"
> ###########
> Hope this helps,
> Gustav Paul

Hi paul, i know that's works, but i need it slightly differtent
because you set out_of_scope_var before you create the block
I want it to be accessible when you set it after you create the block
With your method it is in the scope of the block
I want the block to have access to the scope when you call it
So this should work :


class BlockTest
  def process(&block)
    @block=block
  end
  def myblock
    instance_eval{@block}.call
  end
end


t = BlockTest.new
t.process {"var = #{out_of_scope_var}"}



out_of_scope_var = "out of scope, me"
p t.myblock


But that gives :

blocktest.rb:40: undefined local variable or method `out_of_scope_var'
for main:Object (NameError)
        from blocktest.rb:34:in `myblock'
        from blocktest.rb:45  

:( thanks anyway :)