JS array.inGroupsOf() behaviour for Ruby

array_group.rb

class Array
  def groups_of(s)
    resp = []
    g=[]
    self.each do |i|
      g << i
      if g.count == s
        resp << g
        g= []
      end
    end
    resp << g unless g.empty?
    resp    
  end
  alias / groups_of
end