From: ara.t.howard@...
Date: 2006-02-07T08:01:04+09:00
Subject: Re: Method Definitions: &block vs. yield()

On Tue, 7 Feb 2006, James H. wrote:

> Suppose I had two methods:
>
> # First method
> def my_first_method(b)
>  yield b
> end
>
> # Second method
> def my_second_method(&block)
>  block.call
> end
>
> I know that the block in the 2nd example is converted to a Proc object,
> but a Proc object (to my newb eyes) doesn't seem to hold any advantages
> that might make me want to use the latter method.
>
> I was wondering if there are specific advantages to using the &block
> convention or yield()ing a block?  Is it merely a matter of preference
> and or convention?
>
> James


     harp:~ > cat a.rb
     class C
       def foo(&b) bar &b end
       def bar() yield end
     end
     C::new.foo{ p 42 }


     harp:~ > ruby a.rb
     42


-a

-- 
happiness is not something ready-made.  it comes from your own actions.
- h.h. the 14th dali lama