# [:foo, :bar, :baz].map{|s| s.to_s }.map{|s| s.upcase } # [:foo, :bar, :baz].map(&:to_s).map(&:upcase) [:foo, :bar, :baz].map(&:to_s >> :upcase ) # => ["FOO", "BAR", "BAZ"] # [:foo, :hoge, :bar, :fuga].select{|s| s.to_s.length > 3} # => [:hoge, :fuga] [:foo, :hoge, :bar, :fuga].select(&:to_s >> :length >> 3._(:<)) # => [:hoge, :fuga] project page rubygems.org Build status Installation Add this li