input_output.rb

#Problem 1

require 'rubygems'
require 'rest-client'
require 'open-uri'


wiki_url = "http://en.wikipedia.org/"
wiki_local_filename = "wiki-page.html"

File.open(wiki_local_filename, "w") do |file|
   file.write(RestClient.get(wiki_url))
end


url = "http://ruby.bastardsbook.com/files/fundamentals/hamlet.txt"
puts open(url).readline
#=> THE TRAGEDY OF HAMLET, PRINCE OF DENMARK 

        
url = "http://ruby.bastardsbook.com/files/fundamentals/hamlet.txt"
local_fname = "hamlet.txt"
File.open(local_fname, "w"){|file| file.write(open(url).read)}

File.open(local_fname, "r") do |file|
   file.readlines.each_with_index do |line, idx|
      puts line if idx % 42 == 41
   end   
end


DIRNAME = "data-hold"
Dir.glob("#{DIRNAME}/**/*.*").sort_by{|fname| File.size(fname)}.reverse[0..9].each do |fname|
   puts "#{fname}\t#{File.size(fname)}"
end


DIRNAME = "data-hold"

hash = Dir.glob("#{DIRNAME}/**/*.*").inject({}) do |hsh, fname|
   ext = File.basename(fname).split('.')[-1].to_s.downcase
   hsh[ext] ||= [0,0]
   hsh[ext][0] += 1
   hsh[ext][1] += File.size(fname)   
   hsh
end               
File.open("file-analysis.txt", "w") do |f|
   hash.each do |arr|
     txt = arr.flatten.join("\t")
      f.puts txt
      puts txt
   end
end

require 'open-uri'

BASE_URL = "https://chart.googleapis.com/chart?cht=p&chs=500x300"
rows = File.open("file-analysis.txt"){|f| f.readlines.map{|p| p.strip.split("\t")} }

headers = rows[0]
[1,2].each do |idx|
   labels = []
   values = []
   rows[1..-1].each do |row|
      labels << row[0]
      values << row[idx]
   end
   
   remote_google_img = URI.encode"#{BASE_URL}&chl=#{labels.join('|')}&chd=t:#{values.join(',')}"
puts remote_google_img
  File.open('file-pie-chart.png', 'w'){|f| 
    f.write(open(remote_google_img))
  }
end