Game of Life in one Ruby statement... inspired by APL

But let me explain. Last week, I stumbled upon a new APL apology post. It struck some deep chord in me and gave me an impulse to make another attempt to understand this beautifully weird language.What I (somewhat unexpectedly) find out, is that besides the use of extensive character set and extreme terseness, APL has two main features that are not at all alien to Ruby: calculations through operation chaining, and an extensive library of array operations, suitable for said chaining (in Ruby, they are represented by Enumerable module).