getcodes

#!/usr/bin/ruby -w
# Get all of the codewords from Koopman's catalog, write to stdout.
require 'open-uri'
codes=""
koop = "https://users.ece.cmu.edu/~koopman/crc/"
open(koop + "crc32.html").each do |line|
    # find all linked crcnn.html pages
    line.scan(/href="(crc\d+\.html)"/i).map(&:first).each do |page|
        open(koop + page).each do |row|
            # in each crcnn.html page, look for *_len.txt links
            row.match(/href="(.*_len\.txt)"/i) {
                # add each *_len.txt to str (if there -- some are not)
                begin
                    codes += open(koop + $1).read.strip + "\n"
                    STDERR.puts $1
                rescue
                end
            }
        end
    end
end
puts codes