Reorders a csv file by the specified column.

quick_sort.rb

#!/usr/bin/env ruby -wKU
require "csv"

begin
  puts "Reordering the index.txt file"

  # Read in the csv and set it up to be overwritten
  csv = CSV.read( File.new( '../index.txt', 'r') , 
                            { :headers => true, :col_sep => ';' } )
  new = CSV.open( '../index.txt', 'w', { :col_sep => ';' } )
  new << csv.headers # Add the header line to the new csv

  # reorder the hash and write it backout to the csv.
  csv = csv.sort_by { |col| col['document_modify_date'].to_s }
  csv.each do |row|
    new << row
  end
  puts "Finished reordering."
rescue Exception => e
  puts "Error: #{e.message}"
end