textalyzer.rb

def textalyzer (string)

  file_name = ARGV[0]
  string = open(file_name).read
  histogram(freq(count(str_char(sanitize(string)))))
  return
end

def count (string)

  to_count = {}
  string.each do |element|
    if to_count[element]
      to_count[element] += 1
    else to_count[element] = 1
    end
  end
  to_count
end

def freq (count_hash)
  frequency = {}
  frequency_scrub = {}
  tally = 0

  count_hash.each do |element, value|
    if element < "a" || element > "z"
      frequency_scrub[element] = 1
    else
      tally += value
    end
  end

  count_hash.each do |element, value|
    if element < "a" || element > "z"
      frequency_scrub[element] = 1
    else
      frequency[element] = value.to_f/tally
      frequency[element] *= 100
    end
  end

  frequency.sort
end

def histogram (freq_hash)

  freq_hash.each do |element, value|
    puts element + " [" +  value.round(2).to_s + "%]"  + "=" * (value/0.2)
  end
end

def str_char (string)
  string.chars
end

def sanitize (string)
  string.downcase
end

if __FILE__ == $0

  p textalyzer(ARGV)

end