From: 7stud -- <lists@...>
Date: 2012-09-17T13:52:33+09:00
Subject: Re: Breaking Down the Block

def mode(array)
  freq_for = Hash.new(0)
  array.each {|number| freq_for[number] += 1}

  nums_with_frequs = freq_for.sort_by {|key, val| -val}
  top_count = nums_with_frequs[0][1]
  most_seen = nums_with_frequs.take_while {|number, freq| freq == 
top_count}

  most_seen.map {|number, freq| number}
end


p mode([10, 10, 10, 20, 30, 30, 40, 40, 40])

--output:--
[10, 40]

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