Count words in sentece

# ----------------------------------------------------- #
# Roel Castaño Moreno.									#
# March 21, 2014.										#
# Problem 1 for Icalia Labs.							#
# ----------------------------------------------------- #

# Asks for user's input (sentence to be processed).
print "Please write a sentence: "
sentence = gets.chomp

# Downcases the user's input and splits it into an array.
arrayWords = sentence.downcase!.split

# Creates a hash were the values of the array are stored.
# If the word already exists in the hash, the value is incremented by 1.
list = Hash.new(0)
arrayWords.each do |i|
    list[i] += 1
end

# Outputs each of the words in the hash and its respective count.
list.each do |word, count|
    puts word + " = " + count.to_s
end