From: Gareth Adams <gareth.adams@...>
Date: 2007-02-27T00:57:30+09:00
Subject: Re: symbol to true object

> > > Or
> >
> > > class Symbol
> > >   def to_bool
> > >     if to_s.eql?("true")
> >
> >       if eql?(:true)>       true
> > >     elsif to_s.eql?("false")
> >
> >       elsif eql?(:false)>       false
> > >     else
> > >       raise ArgumentError
> > >     end
> > >   end
> > > end
> >
> > > :true.to_bool => true
> > > :false.to_bool => false
> > > :nothing.to_bool => ArgumentError

class Symbol
  def to_bool
    case to_s
      when "true" then true
      when "false" then false
      else raise ArgumentError
    end
  end
end