function removeDuplicates(array $aArray)
{
    $aResult = array();
    $aTemp = array();
    foreach($aArray AS $sKey => $sValue )
    {
        if (isset($aTemp[$sValue]))
        {
            unset($aResult[$aTemp[$sValue]]);
        } // if
        else
        {
            $aTemp[$sValue] = $sKey;
            $aResult[$sKey] = $sValue;
        } // else
    } // foreach

    return $aResult;
} // function