Inside the file "http://tech2.bumbung.net/questions/article.txt" is an article that we would like to know the number of times each word has been shown.

word_count.rb

str = gets.chomp  # Take text input from console
# scan the text to remove punctuations and split
str = str.scan(/[\w']+/)
# create a Hash for storing the word count
words = Hash[str.uniq.map{ |i| [i, str.count(i)] }]

# print the number of times each word has been shown
for word, count in words
  puts("#{word} = #{count}")
end