From: Martin DeMello <martindemello@...>
Date: 2010-07-07T23:18:34+09:00
Subject: Re: Ruby switches

On Wed, Jul 7, 2010 at 6:23 PM, Kenneth <ken70r@gmail.com> wrote:

> I was hoping there would be something like
> case user
> when banned?    then ...
> when activated? then ...
> end
>
> I would like to see something like this but it seems hard to implement.

class User
  attr_accessor :banned

  def banned?
    banned
  end

  def active?
    not banned
  end
end

class Symbol
  def ===(other)
    other.send(self)
  end
end

a = User.new
a.banned = true

case a
when :banned? ; puts "banned!"
when :active? ; puts "active!"
end

a.banned = false

case a
when :banned? ; puts "banned!"
when :active? ; puts "active!"
end

martin