Véase También

1. Pat Shaughnessy - Functional Programming In Ruby YouTube. Trasparencias en https://speakerdeck.com/pat_shaughnessy/functional-programming-and-ruby
2. An Introduction to Procs, Lambdas and Closures in Ruby (CooperPress)
3. Ruby 2.0 - Getting Started and Named Parameters
4. Programming with Nothing por Tom Stuart (Rubymanor)
5. "Impossible Programs" a talk by Tom Stuart, author of "Understanding Computation" (O'Reilly)
6. Ruby Conf 12 - Y Not- Adventures in Functional Programming by Jim Weirich YouTube