gistfile1.rb

class Output <
  Struct.new(:name, :price)
end

unless ARGV.length == 1
  puts "Wrong number of Arguments"
  puts "Usage: ruby #{File.basename(__FILE__)} InputFile.tsv > SortedOutputFile.tsv\n"
  exit
end

# get the input filename from the command line
input_file = ARGV[0]

# define an array to hold the Output records
arr = Array.new

#loop through tsv, add to array
f = File.open(input_file, "r")
f.each_with_index { |line, i|
  name_index = ""
  price_index = ""
  if(i==0) then
    headers = line.split("\t")
    headers[2] = headers.last.strip
    name_index = headers.index("Name")
    price_index = headers.index("Price")
  end 
  next if i == 0
  next if line[0] == "#" 
  words = line.split("\t")
  p = Output.new
  puts name_index
  p.name = words[0]
  p.price = words[2].to_f
  arr.push(p)
}

# sort the data by the price field
arr.sort! { |a,b| a.price <=> b.price }
# print out all the sorted records
puts "Name" + "\t" + "Price"
arr.each { |p| 
  puts p[0] + "\t" + p[1].to_s + "\n"
}
~