Is there a ProcessWire way to do this?

[PWaddict]

Hello, I'm outputing repeater content in ProcessWire way like this instead of the classic foreach.

<?= preg_replace('/(.*),/','$1 &', $page->datetimes->implode(", ", "{day} {time_start}-{time_end}"))
// Monday 19:00-21:00, Tuesday 19:00-21:00 & Wednesday 19:00-21:00 ?>

Is there a ProcessWire way to output the content like below where if the time_start and time_end have the same values on all days then display them only once at the end of the string:

Monday, Tuesday & Wednesday 19:00-21:00