Autoloaded Classes that Receive Values During Instantiation

[eluser]Krumpet[/eluser]
Ok, I've been able to call classes and pass in arrays. Thanks for the suggestion.

Let's say I'm at http://www.somewhere.com/calling/ and my Calling class needs to work with the Called library. I can do this as follows:

Code:

class Calling{
  public function index()
  {
    $foo = array();
    $this->load->library('called',$foo);
  }
}

Code:

class Called{
  public function __construct($foo = array())
  {
    whatever
  }
}

However, I don't always want to pass in an array. Sometimes I want to pass a string, sometimes an integer, and sometimes an object.

How can I create the Called class so it will accept different types of arguments?

EDIT: I've also verified I can put an object into an array and pass it to the Called class. Still wondering if CI requires everything to be passed in array form.