From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-08-27T07:21:57+09:00
Subject: Re: doubling numbers with Object#object_id

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EbFFA:

> I was playing with Ruby and wrote an interesting method:

>     def double n
>       n.object_id - 1
>     end

> Anyone know why this works? Why Ruby was implemented this way?

Note that other Ruby implementations (JRuby, Rubinius, IronRuby=E2=80=A6) do
not have to keep this contract; it=E2=80=99s best considered as MRI peculia=
rity.
But yes, I do find this design beautiful =E2=80=93 as well as Ruby=E2=80=99=
s method
lookup: http://www.viddler.com/explore/CobyR/videos/1/

=E2=80=94 Shot
--=20
It is absurd to have a hard and fast rule about what one should read and
what one shouldn=E2=80=99t. More than half of modern culture depends on wha=
t one
shouldn=E2=80=99t read.           [Oscar Wilde, The Importance of Being Ear=
nest]

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