<?php 
 
/**
 * I
 * 
 * Iterator Base Class
 * 
 * @package   Kirby Toolkit 
 * @author    Bastian Allgeier <bastian@getkirby.com>
 * @link      http://getkirby.com
 * @copyright Bastian Allgeier
 * @license   http://www.opensource.org/licenses/mit-license.php MIT License
 */
class I implements Iterator {
 
  public $data = array();
 
  /**
   * Constructor
   * 
   * @param array $data
   */
  public function __construct($data = array()) {
    if(is_array($data)) $this->data = $data;
  }
 
  /** 
   * Checks if the current key is set
   * 
   * `isset($mycollection->mykey)`
   * 
   * @param string $key the key to check
   * @return boolean
   */
  public function __isset($key) {
    return isset($this->data[$key]);
  }
 
  /** 
   * Removes an element from the array by key