Histogram

histogram.rb

def histogram_for(text)
  words = text.split(' ')
  frequency = Hash.new(0)
  words.each { |word| frequency[word.downcase] += 1 }
  frequency.sort_by {|_key, value| value}.to_h
end

# Read file
text = "word1 word2 word3"

histogram = histogram_for text

histogram.each do |word, frequency|
  puts "#{word}: #{frequency}"
end