From: Robert Klemme <shortcutter@...>
Date: 2008-10-01T20:43:26+09:00
Subject: Re: Mode method for Array

2008/10/1 Erik Veenstra <erikveen@gmail.com>:
> Speed is also the reason for "pre-defining" variables used in
> iterations. (6% faster!!)

Premature optimization IMHO.

Here's another nice and short one:

irb(main):001:0> module Enumerable
irb(main):002:1>   def mode
irb(main):003:2>     max = 0
irb(main):004:2>     c = Hash.new 0
irb(main):005:2>     each {|x| cc = c[x] += 1; max = cc if cc > max}
irb(main):006:2>     c.select {|k,v| v == max}.map {|k,v| k}
irb(main):007:2>   end
irb(main):008:1> end
=> nil
irb(main):009:0> [3, 1, 1, 55, 55].mode
=> [55, 1]
irb(main):010:0> [].mode
=> []
irb(main):011:0>

Cheers

robert

-- 
remember.guy do |as, often| as.you_can - without end