Ruby: Concise way to conditionally join strings with newlines?

Question

I need to add a description string to an existing comments variable, which contains either a string or nil . I want to separate the new description from any existing comments with a newline, but only if there are existing comments. I've come up with a couple ways that are kind of concise,

old_comments = comments + "\n" rescue ""
new_comments = old_comments + description

or

new_comments = [comments, description].compact.join("\n")

but I'm surprised there's not a less "tricky" way to squeeze this into a one-liner. Or is there?

Answer 1

[*comments, description].join($/)