From: Urabe Shyouhei <shyouhei@...>
Date: 2009-05-11T21:58:42+09:00
Subject: [ruby-core:23427] Re: [Bug #1363] Wrong value for Hash of NaN

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Yukihiro Matsumoto wrote:
> Hi,
>=20
> In message "Re: [ruby-core:23423] Re: [Bug #1363] Wrong value for Hash =
of NaN"
>     on Mon, 11 May 2009 19:03:59 +0900, Nobuyoshi Nakada <nobu@ruby-lan=
g.org> writes:
>=20
> |At Wed, 8 Apr 2009 14:38:31 +0900,
> |Heesob Park wrote in [ruby-core:23154]:
> |> Ruby cannot handle NaN as a unique key of Hash.
> |
> |It's easy to make them unique as key, I'm not sure which is
> |"correct" behavior though.
>=20
> Two NaN values are not equal with each other by definition, in that
> sense, even though some might want to use NaN as a hash key, the
> current behavior seems to be "correct".

I don't argue about correctness on NaNs being different each other, but I=
 also
agree with the reporter with Hash being inconvenient when NaNs used as ke=
ys.


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