[SOLVED] how to filter by a string that contains a comma?

I have a Ditto filter: This outputs items that contain a certain artist name in their tags. Sometimes an artist name happens to a substring of another artist name: like ’Alexa’ in ’Alexander’. Tags in my documents are delimited with comma and space.

The question is: How can I add my delimiter (comma+space) to my filter parameter? I see that won’t work...

you can change the delimiter to be something other than a comma:
http://ditto.modxcms.com/files/snippet-ditto-php.html#localFilterDelimiter

oh thanks! I must have missed that parameter:) Thanks!