Ruby 1.9: chain methods powered

 Often we use the "chain methods" technique to perform some operations on the same object in a "concise" way: puts "apples".reverse.upcase # => SELPPA How handy could be to do something "outside" the chain without leaving it? The new method tap was introduced (and backported to 1.8 too): puts "apples".reverse .tap{ |o| puts "reversed: #{o}" } .upcase # => reversed: selppa # => SELPPA As we can see it is really easy to code: class Object def tap yield self self end end

Picture credits to Ashu Mittal