kddnewton

#!/usr/bin/python
# 
# Takes first command line argument as path to an input file.
# Input file is expected to contain 81 numbers, with 0 
# representing empty spaces, and 1-9 representing given numbers.

from sys import argv, stdout, exit

# tries different possibilities, backtracks if necessary
def backtracking(domains, assignments, constraints):

kddnewton

namespace :doc do
  desc "Print HTTP status codes with associated symbols"
  task :status_codes do
    Rack::Utils::SYMBOL_TO_STATUS_CODE.each do |symbol, status_code|
      puts "#{status_code}   :#{symbol}"
    end
  end
end

# Output from `bin/rake doc:status_codes`

kddnewton

class << ActiveRecord::Base
  prepend Module.new {
    class SelectChain < BasicObject
      INVALID_ARGUMENTS =
        '.select.not arguments must be a list of one or more symbols'.freeze

      def initialize(scope)
        @scope = scope
      end

kddnewton

# I really don't like getting routing error notifications when scanners try to
# find vulnerabilities in our application. As such, this extends our routing
# to actually give a response, but it's likely not what they were looking for.
# If they're not using a headless browser, the `alert` is going to kill their
# productivity. If they are, they just might enjoy the youtube video anyway.
class AnnoyScannersServer
  SCANNER_PATHS = %w[
    /a2billing/admin/Public/index.php
    /a2billing/common/javascript/misc.js
    /a2billing/customer/templates/default/css/popup.css

kddnewton

Faster Rails tests

Feedback loop speed in one of the biggest contributing factors to overall development time. The faster you get results, the faster you can move on to other things. A fast enough test suite is therefore critical to teams' success, and is worth investing some time at the beginning to save in the long run.

Below is a list of techniques for speeding up a Rails test suite. It is not comprehensive, but should definitely provide some quick wins. This list of techniques assumes you're using minitest, but most everything should translate over to rspec by simply replacing test/test_helper.rb with spec/spec_helper.rb.

• Lead with data
• bcrypt
• bootsnap
• Cache Time::utc calls

kddnewton

# frozen_string_literal: true

require 'ripper'

# A Ripper parser that will replace usage of Sorbet patterns with whitespace so
# that location information is maintained but Sorbet methods aren't called.
class Eraser < Ripper
  # Represents a line in the source. If this class is being used, it means that
  # every character in the string is 1 byte in length, so we can just return the
  # start of the line + the index.

kddnewton

def count_constant_refs(iseq)
  cached = false

  iseq.last.each_with_object([]) do |insn, counts|
    case insn
    in [:opt_getinlinecache, *]
      cached = true
      counts << 0
    in [:getconstant, *]
      counts[counts.length - 1] += 1 if cached

kddnewton

words = []
letters = ("a".."z").to_a

File.foreach("/usr/share/dict/words", chomp: true) do |word|
  words << word.downcase if word.match?(/\A[a-z]{5}\z/i)
end

while words.length > 1
  weights = letters.to_h { |letter| [letter, 0] }  
  words.each do |word|

kddnewton

kddnewton

# frozen_string_literal: true

module ActiveRecord
  class Migration
    class MigrationError < StandardError
    end

    RenameColumn = Struct.new(:table_name, :column_name, :new_column_name, keyword_init: true)
    RemoveColumn = Struct.new(:table_name, :column_name, keyword_init: true)
    AddColumn = Struct.new(:table_name, :column_name, :type, :options, keyword_init: true)