Yeah it's really hard to introduce, let alone completely stick with, FP in a non-FP language. I started to introduce some into our Ruby/Rails project, but halfw

Yeah it's really hard to introduce, let alone completely stick with, FP in a non-FP language. I started to introduce some into our Ruby/Rails project, but halfway through, the code was more procedural than functional (which admittedly is more concise and cogent than OO); it's really hard to remember to treat everything as immutable all the time.