From: Joel VanderWerf <vjoel@...>
Date: 2003-12-13T04:37:31+09:00
Subject: Re: Nuby interruption (Was: Can't define +@ for Symbol (plus ruby install problem))

T. Onoma wrote:
> As far as I know -@ and +@ are the only unary operators that can be defined.

One more, at least:

irb(main):001:0> class Foo; def ~@; "FOO"; end; end
=> nil
irb(main):002:0> ~Foo.new
=> "FOO"

I like this one because ~ is less suggestive than + and -, so it could 
be used for a wider variety of concepts.