dmkolobov/Howl-Denver — comment on commit c29a254dcdf0395206ee36281e39c1d795c0a5f7
File: app/views/concerts/_form.html.erb line 39
By cjolly:

hint: `@concert.artists.present?`

It is one of those methods that we've talked about that is actually provided by Rails' ActiveSupport, and not ruby itself. But it's a nice shortbuc