From: Ralph Mason <ralph.mason@...>
Date: 2001-12-24T10:22:56+09:00
Subject: [ruby-talk:29388] Re: a better way?

From: "Ron Jeffries" <ronjeffries@REMOVEacm.org>
>
> >Or in recent 1.7.2,
> >
> >  class Temp
> >    @@save = Hash.new do |h, c|
> >      puts "Performing calculation...."
> >      h[c] = c * 9 / 5 + 32
> >    end
> >    def fahrenheit(c)
> >      @@save[c]
> >    end
> >  end
>
> These are way cool.  I gather the 1.7.2 feature is new? I think I'm in
> 1.6 and it doesn't work there.

This does lead me to think that there is a surprise here.  Notably that a
function that does not expect a block will happily accept one and not make
any noise about it.

It would be nice to get some warning, e.g.  : Hash.new()  - block supplied
but not used

Ralph