A little help needed with creating a library

[eluser]matrim[/eluser]
I'm trying to create a library but am having problems to pass config values to it

I want to be able to pass values in 2 ways

1. user passes array of configuration parameters to set the values
or
2. user creates a config file (/system/application/config/myclass.php) and this is automatically picked up

So what I have so far is something like

Code:

class MyClass
{
   public user = "";
   public pass = "";

   function MyClass($config = array())
   {
      if($config > 0)
      {
         this->initialize($config)
      }
   }

   function initialize($config = array())
   {
       foreach ($config as $key => $val)
    {
       if (isset($this->$key))
       {
                $this->$key = $val;
       }
    }
   }

   function doSomething()
   {
   }
}

But it doesn't work either way.

I previously had it working passing a $params array directly into the constructor without the initialize function but want to be able to do it via a config file.

The docs say you can do this but I can't find an example of it to see if I'm doing it correctly. The above way is from me looking over the ci_email class in the build in libraries and trying to copy that