Counting non-printable characters in .js and .css files.

gistfile1.rb

class FileInfo
  def initialize(name, data)
    @name = name
    @length = data.length
    @space = data.each_char.inject(0) { |n, c|
      n += case c
           when '\t' then 8
           when /\s/ then 1
           else 0
           end
    }
  end

  attr_reader :name, :length, :space

  def rate
    (space / length.to_f * 10000).round / 100.0
  end
end

Dir.entries('.').map{ |filename|
  if ['.js', '.css'].include?(File.extname(filename))
    data = File.read(filename)
    FileInfo.new(filename, data)
  end
}.select{ |obj| obj and obj.length >= 100 }.sort{ |x, y|
  x.rate <=> y.rate
}.each do |file|
  puts "#{file.name.ljust(20)}#{file.length.to_s.rjust(8)}" +
       "#{file.space.to_s.rjust(8)}\t#{file.rate}%"
end

gistfile2.txt

steelseries-min.js    222018    2217  1.0%
bootstrap.min.js        3880      48	1.24%
jquery-1.9.1.min.js    92629    1212	1.31%
jquery-1.6.1.min.js    91342    1331	1.46%
jquery-1.4.2.min.js    72174    1222	1.69%
bootstrap.min.css      50517    2451	4.85%
dude.js                   15       1	6.67%
hello.js                  61       7	11.48%
empty.js                  30       4	13.33%
http.js                50085   11376	22.71%
classes.js              1488     340	22.85%
classes-old.js          1348     308	22.85%
json2_backbone.js      45618   10529	23.08%
jquery-1.6.1.js       234995   57258	24.37%
jquery-1.7.2.js       252881   61939	24.49%
bootstrap-modal.js      5677    1413	24.89%
style.css                917     231	25.19%
intro.js                 890     242	27.19%
intro-old.js             880     242	27.5%
modernizr.js           47402   13351	28.17%
app.js                  3319    1338	40.31%
uglify.js              52665   22177	42.11%
parser.js              80634   38364	47.58%