Enumerable#compact_flat_map

compact_flat_map.rb

module Enumerable
  def compact_flat_map(&block)
    return to_enum(:compact_flat_map) unless block_given?
    compact.flat_map(&block)
  end
  alias_method :compact_collect_concat, :compact_flat_map
end

p [1, 2, nil, 4, 5, nil].compact_flat_map { |i| [i + 1, i - 1] }

["Bryan", "Baldur", nil, nil, "DAN"].compact_flat_map do |name|
  p "I'M #{name.upcase} AND I'M YELLING"
end

__END__
[2, 0, 3, 1, 5, 3, 6, 4]
"I'M BRYAN AND I'M YELLING"
"I'M BALDUR AND I'M YELLING"
"I'M DAN AND I'M YELLING"