Shortest way to write ternary in Ruby that returns other value for nil?

Question

Often I want to write something that returns "Yes" if true, "No" if false, or "NA" (or any other string really) if nil. Currently I do this:

@contact.boolean ? 'Yes' : (@contact.boolean.nil? ? "NA" : "No")

Is this the shortest way to write this?

Answer 1

Here's one idea:

> {true => "Yes", false => "No", nil => "N/A"}[true]
 => "Yes" 

So, of course, you would do {true => "Yes", false => "No", nil => "N/A"}[value]