From: klochner <klochner@...>
Date: 2009-01-29T05:37:39+09:00
Subject: Re: yield vs. return

On Jan 28, 3:21 pm, Stefano Crocco <stefano.cro...@ali
> Can you give an example of a situation where you think yield is used in place
> of return? This way, we'll be able to understand better what you're referring
> to and make more useful comments.
>
> Stefano

The calling code would need to be modified to work with yield vs.
return.

Here's a slightly different example, because I see this a lot with
multivariate return values:

##return style, with calling code below
def returnfoo
  return foo1,foo2
end
a,b = returnfoo
puts a; puts b

 vs.

##yield style, with calling code below
def yieldfoo
  yield foo1, foo2
end
yieldfoo {|a,b| puts a; puts b }


What I'm getting at is that I see ruby programmers use yield to
essentially return values to the caller, the distinction being whether
the block is executed by the caller or by the method (returnfoo/
yieldfoo).  It could be done either way because no operations are
performed by the method after the yield.