reverse_words.rb

def reverse_each_word(sentence)
  arr = []
  sentence.split.map do |word|
    reversed = ""
    i = 0
    while i < word.length
      reversed << word[word.length-(i+1)]
      i += 1
    end
    arr << reversed
  end
  puts arr = arr.join(" ")
end

reverse_each_word("Hello there, and how are you?")
#=> "olleH ,ereht dna woh era ?uoy"