Top N words

top_n_words.rb

puts "Enter sentence"
sentence = gets.chomp
puts "You entered '#{sentence}'"

puts "How many top words would you like to see?"
n = gets.chomp.to_i
puts "Alright, let me get that for you.."

words = sentence.split

frequency_map = {}

words.each do |word|
  if frequency_map.key?(word)
    frequency_map[word] = frequency_map[word] + 1
  else
   frequency_map[word] = 1
  end
end

frequency_map = frequency_map.sort_by {|k, v| v}.reverse

top_n = frequency_map.take(n).map { |k, v| k }

puts "And the winners are:"

top_n.each { |t| puts t }