Best way to convert hash keys to array only if their values are set to true

Question

I'm trying to find an elegant and compact way to convert hash keys into array that contains only those that have true as value

example = {"foo" => true, "bar" => false, "baz" => true}

become

example = ["foo", "baz"]

Answer 1

example = example.keys.select {|key| example[key].eql? true}

p example

output

["foo", "baz"]