From: Rolando Abarca <funkaster@...>
Date: 2008-10-17T09:39:19+09:00
Subject: about lambda and its binding

is there a way to specify the binding of a proc created through lambda?

eg:

$ cat test.rb
class A
   attr_reader :foo
   def initialize
     @foo = lambda { do_that_thing }
   end
end

class B
   def do_that_thing
     puts "yeah, do it!"
   end

   def initialize
     a = A.new
     a.foo.call
   end
end

B.new

$ ruby test.rb
test.rb:4:in `initialize': undefined local variable or method  
`do_that_thing' for #<A:0x127f28 @foo=#<Proc:0x00128608@test.rb:4>>  
(NameError)
	from test.rb:15:in `call'
	from test.rb:15:in `initialize'
	from test.rb:19:in `new'
	from test.rb:19

So... is there a way to call the lambda defined in A with the binding  
of B?
thanks a lot for any hint...
-- 
Rolando Abarca M.