From: Erik Veenstra <erikveen@...>
Date: 2008-10-01T10:11:33+09:00
Subject: Re: Mode method for Array

Using Enumerable#cluster_by (already defined in Facets):

module Enumerable
  def mode
    cluster_by do |element|
      element
    end.cluster_by do |cluster|
      cluster.length
    end.last.ergo do |clusters|
      clusters.transpose.first
    end # || []
  end
end

gegroet,
Erik V.