From: Ryan Davis <ryand-ruby@...>
Date: 2011-06-25T05:20:02+09:00
Subject: Re: Honoring #to_ary and such


On Jun 24, 2011, at 12:38 , Intransition wrote:

> Well, for about the first time I am writing a library that has to be
> very strict about types. Per the usual I am testing types with `case`,
> e.g.
> 
>    def foo=(foo)
>     @foo = \
>       case foo
>       when Array
>          foo
>       when String
>          [foo]
>       else
>         raise
>       end
>    end
> 
> Now as I do this it occurs to me, shouldn't I also honor anything that
> responds_to?(:to_ary) as an Array? And if so, what's the "usual" way
> to handle it then?

def foo= foo
  @foo = Array(foo)
end