Added some unility methods to Unl_Model_Collection

library/Unl/Model/Collection.php

@@ -113,5 +113,33 @@ class Unl_Model_Collection implements Iterator, Countable, ArrayAccess
 		}
 		return $ids;
 	}
+
+	public function orderBy($method)
+	{
+	    $valuesToSortOn = array();
+	    $modelKeys = array();
+	    foreach ($this->_models as $key => $model)
+	    {
+	        $valuesToSortOn[] = $model->$method();
+	        $modelKeys[] = $key;
+	    }
+	    $valuesToSortOn = array_map('strtolower', $valuesToSortOn);
+	    array_multisort($valuesToSortOn, $modelKeys);
+	    $sortedModels = array();
+	    foreach ($modelKeys as $modelKey) {
+	        $sortedModels[$modelKey] = $this->_models[$modelKey];
+	    }
+	    $this->_models = $sortedModels;
+	}
+
+	public function arrayFromMethod($method)
+	{
+	    $data = array();
+	    foreach ($this->_models as $model)
+	    {
+	        $data[$model->getId()] = $model->$method();
+	    }
+	    return $data;
+	}
 }