From: Kirk Haines <khaines@...>
Date: 2004-02-13T15:08:05+09:00
Subject: Re: return from yielded block

On Fri, 13 Feb 2004, Ara.T.Howard wrote:

> what i want to do is something like
> 
>   value = meth 42
> 
> where
> 
>   def meth n
>     block_meth do
>       if n == 42
>         return 'forty-two'
>       else
>         return 'ask another question'
>       end
>     end
>   end
> 
>   def block_meth
>     yield
>   end
> 
> 
> the problem is that you can't 'return' from a block - so how is this done?

def block_meth
  yield
end

def meth n
  block_meth do
    r = nil
    if n == 42
      r = 'forty two'
    else
      r = 'ask another question'
    end
    r
  end
end


irb(main):018:0> x = meth 74
=> "ask another question"
irb(main):019:0> puts x
ask another question
=> nil
irb(main):020:0> y = meth 42
=> "forty two"
irb(main):021:0> puts y
forty two
=> nil



Is that what you are looking for?


Kirk Haines