From: Bertram Scharpf <lists@...>
Date: 2007-01-13T13:37:49+09:00
Subject: Re: What does this mean? ||=

Hi Justin,

Am Samstag, 13. Jan 2007, 04:52:29 +0900 schrieb Justin Ko:
> I'm looking at this method and don't understand what ||= means:
> 
> def current_account
>     @account ||= Account.find(session[:account_id])
>  end

A scheme I practice a lot:

  def meth parm = nil
    parm ||= "default"
    ...
  end

  ...

  a = some_calculation
  obj.meth a   # a may be nil and still hits the default value

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de