src/Helper/ToolboxFile.php
protected function addClasses(&$arrSource)
    {
        $countFiles = count($arrSource);
        foreach (array_keys($arrSource) as $k) {
            $arrSource[$k]['class'] = (($k == 0) ? ' first' : '') .
                (($k == ($countFiles - 1)) ? ' last' : '') .
                ((($k % 2) == 0) ? ' even' : ' odd');
        }
    }
protected function addClasses(&$arrSource)
    {
        $countFiles = count($arrSource);
        foreach (array_keys($arrSource) as $k) {
            $arrSource[$k]['class'] = (($k == 0) ? ' first' : '') .
                (($k == ($countFiles - 1)) ? ' last' : '') .
                ((($k % 2) == 0) ? ' even' : ' odd');
        }
    }
Attach first, last and even/odd classes to the given array.

@param array $arrSource The array reference of the array to which the classes shall be added to.

@return void