From: Justin Bailey <jgbailey@...>
Date: 2006-05-06T01:43:15+09:00
Subject: Re: Ruby 2.0: Symbol uniqueness?

------=_Part_27644_33408257.1146847388859
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline

This may be a question for the Ruby Core list?

On 5/5/06, MenTaLguY <mental@rydia.net> wrote:
>
> I just learned yesterday that different string values can intern to the
> same symbols; for example:
>
> p "!".intern =3D=3D "!@".intern # =3D> true
> p "-(unary)".intern =3D=3D "-@".intern # =3D> true
>
> There aren't many such cases, but it makes life awkward if you're writing
> code where two such strings are valid input (e.g. "!" and "!@" are both
> valid, if unusual, identifiers in Scheme s-expressions).
>
> This seems to be a side-effect of the current implementation of unary
> operators in Ruby 1.x -- is it slated for change in Ruby 2.0?
>
> I think it'd be nice if Ruby symbols were guaranteed to uniquely represen=
t
> string values, and x.intern.to_s =3D=3D x were an invariant for non-empty
> strings.
>
> -mental
>
>
>

------=_Part_27644_33408257.1146847388859--