Text Analyzer with error handling and logging

analyzer2.rb

require 'logger'

$LOG = Logger.new('analyzer.log', 'monthly')

def document_to_string(filename)
  $LOG.debug("File name : #{filename}")
  text = ''
  begin
    File.open(filename) do |f|
      while line = f.gets
        text << line
      end
    end
    rescue Exception => e
      $LOG.error "File not found! #{e}"
      puts "#{e}"
      exit
  end
  text
end

def character_count(text)	
  text.length
end

def character_count_without_spaces(text)
  text.gsub(/ /,'').length
end

def line_count(text)
  text.split("\n").size
end

def word_count(text)
  words = text.split(' ')
  words.size
end

def sentence_count(text)
  sentences = text.gsub(/ /,'')
  no_punctuations = sentences.gsub(/[\.\?\!\;]/, ' ')
  no_punctuations.split(' ').size
end

def paragraph_count(text)
  text.split("\n\n").size
end

def calculate_average_number_of_words_per_sentence(words, sentences)
  words/sentences.to_f
end

def calculate_average_number_of_sentences_per_paragraph(sentences, paragraphs)
  sentences/paragraphs.to_f
end

print "Enter filename : "
fname = gets.chomp!
sample = document_to_string(fname)
average_words = calculate_average_number_of_words_per_sentence(word_count(sample), sentence_count(sample.gsub(/\n/, '')))
average_sentences = calculate_average_number_of_sentences_per_paragraph(sentence_count(sample.gsub(/\n/, '')), paragraph_count(sample))
puts "Analyzing #{fname} . . .\n"
puts "The number of characters is #{character_count(sample)}"
puts "The number of characters (without spaces) is #{character_count_without_spaces(sample.gsub(/\n/, ''))}"
puts "The number of lines is #{line_count(sample)}"
puts "The number of words is #{word_count(sample)}"
puts "The number of sentences is #{sentence_count(sample.gsub(/\n/, ''))}"
puts "The number of paragraphs is #{paragraph_count(sample)}"
puts "The average number of words in a sentence is %.2f" % average_words
puts "The average number of sentences in a paragraph is %.2f" % average_sentences