Simple search on Hash

hash_search.rb

def search(hash, keyword)
  if (hash.respond_to?(:keys) && hash.keys.include?(keyword))
      hash[keyword]
  elsif hash.respond_to?(:find)
    result = nil
    hash.values.find { |value| result = search(value, keyword) }
    result
  end
end

# hash = {
# 	"a" => "b", 
# 	"c" => "d",
# 	"e" => {
# 		"f" => "g",
# 		"h" => {
# 			"i" => "j",
# 			"k" => "l"
# 		}
# 	}
# }

# puts search(hash, "a") => "b"
# puts search(hash, "i") => "j"
# puts search(hash, "n") => nil