glv

def evolve(generation)
 live_neighbor_stats = generation_stats(generation)
 live_neighbor_stats[3] + (live_neighbor_stats[2] & generation)
end

def generation_stats(live_cells)
  live_cells.each_with_object(Hash.new(0)) {|live_cell, counter|
    neighbors(*live_cell).each {|neighbor| counter[neighbor] += 1 }
  }.each_with_object(Hash.new {|h,k| h[k] = []}) {|(cell, count), collector| collector[count] << cell}
end

glv

entries.map(&:job).sort_by(&:number).map(&:project).compact.uniq