words

words = [
  'apple',
  'banana',
  'banana',
  'foo',
  'ruby',
  'apple',
  'piston',
  'eagle',
  'lemon',
  'apple',
  'banana',
  'ruby'
]

result = Hash.new

words.map do |x|
  result[x] = result[x].to_i + 1
end

r = result.sort_by { |word, count| count}.reverse.take(3)
puts r.inspect