wconrad

#!/usr/bin/env ruby

# Reproduce an anomaly in Ruby's built-in dbm library: When iterating
# over a DBM file, accessing a second dbm file's enumerator
# prematurely ends the first file's iteration.

require "dbm"
require "tmpdir"

system("ruby -v")         # => ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]

wconrad

# frozen_string_literal: true

require "activerecord-sqlserver-adapter"

# Monkey-patch the SqlServer/ActiveRecord adapter to set
# certain connection options.
#
# --- SET ARITHABORT ON
#
# SqlServer, when a tcp/ip connection is made, sets some default

wconrad

#!/usr/bin/env ruby

# http://adventofcode.com/day/20

input = 34000000

def deliver_presents(num_houses)   
  presents = [0] + [0] * num_houses
  (1..num_houses).each do |elf|
    (elf..num_houses).step(elf) do |house_number|

wconrad

#!/usr/bin/env ruby

# http://adventofcode.com/day/17

def containers_totalling(containers, target_sum)
  Enumerator.new do |yielder|
    (0...(2 ** containers.size)).map do |mask|
      selected_containers = containers.select.with_index do |container, bitnum|
        (mask & (1 << bitnum)) != 0
      end

wconrad

#!/usr/bin/env ruby

# http://adventofcode.com/day/16

Sue = Struct.new(:id, :attrs)

sues = File.read("input").each_line.map do |line|
  id = Integer(line[/(\d+)/])
  attrs = Hash[
    line.scan(/(\w+): (\d+)/).map do |key, value|

wconrad

# http://adventofcode.com/day/15

require "forwardable"

Ingredient = Struct.new(:coefficients, :calories)

class Ingredients

  extend Forwardable

wconrad

#!/usr/bin/env ruby

# http://adventofcode.com/day/6

class Lights

  def initialize
    @lights = HEIGHT.times.map do
      [false] * WIDTH
    end

wconrad

class Raindeer

  attr_reader :name

  def initialize(name:, speed:, sprint_time:, rest_time:)
    @name = name  
    @speed = speed
    @sprint_time = sprint_time
    @rest_time = rest_time
  end

wconrad

#!/usr/bin/env ruby

# http://adventofcode.com/day/13

INPUT_PATTERN = /^(\w+) would (gain|lose) (\d+) happiness units by sitting next to (\w+).$/

@deltas = Hash[
  File.read("input").lines.map do |line|
    raise line.inspect unless line =~ INPUT_PATTERN
    person, sign, delta, neighbor = $~.captures

wconrad

#!/usr/bin/env ruby

# http://adventofcode.com/day/12

require "json"

# part 1

puts File.read("input").scan(/-?\d+/).map(&:to_i).reduce(0, &:+)