Finished day 5, part 1!

src/advent/day1.rb

@@ -39,7 +39,7 @@ def get_calibration_code(line)
 end
 
 def get_sum_of_calibration_code(document)
-  calibration_codes = document.split("\n").map do |line|
+  calibration_codes = document.split("\n").hash do |line|
     get_calibration_code line
   end
   calibration_codes.reduce 0, :+

src/advent/day2.rb

@@ -43,13 +43,13 @@ class Game
   def self.deserialize(line)
     id = /\s*Game\s+(\d+):/.match(line)[1].to_i
     draws_as_text = line[line.index(":") + 1..]
-    draws = draws_as_text.split(";").map(&Draw.method(:deserialize))
+    draws = draws_as_text.split(";").hash(&Draw.method(:deserialize))
     self.new id, draws
   end
 
   def fewer_number_of_cubes
     [:blue, :red, :green].map do |color|
-      @draws.map {|draw| draw.send color }
+      @draws.hash {|draw| draw.send color }
             .max || 0
     end
   end

src/advent/day3.rb

@@ -98,7 +98,7 @@ class EngineLine
 
   def extract_engine_numbers
     digit_indexes = extract_digit_indexes @line
-    group_digit_indexes(digit_indexes).map &method(:create_engine_number)
+    group_digit_indexes(digit_indexes).hash &method(:create_engine_number)
   end
 
   def extract_gears
@@ -119,13 +119,13 @@ class Engine
   end
 
   def self.deserialize(ser)
-    els = ser.strip.split("\n").each_with_index.map { |line, idx| EngineLine.new idx, line}
+    els = ser.strip.split("\n").each_with_index.hash { |line, idx| EngineLine.new idx, line}
     return self.new els
   end
 
   def extract_engine_numbers
     @engine_lines
-      .map {|line| line.extract_engine_numbers}
+      .hash {|line| line.extract_engine_numbers}
       .flatten
   end
 
@@ -159,7 +159,7 @@ class Engine
 
   def is_adjacent(engine_number, gear)
     gear.get_neighbourhood
-        .map {|point| engine_number.is_located_on(point[:line_index], point[:column_index])}
+        .hash {|point| engine_number.is_located_on(point[:line_index], point[:column_index])}
         .any?
   end
 
@@ -170,15 +170,15 @@ class Engine
 
   def extract_gears
     @engine_lines
-      .map {|line| line.extract_gears}
+      .hash {|line| line.extract_gears}
       .flatten
   end
 
   def get_gear_ratios
     extract_gears
-      .map {|gear| get_adjacent_number_parts(gear)}
+      .hash {|gear| get_adjacent_number_parts(gear)}
       .filter {|adjacent_numbers| adjacent_numbers.length == 2}
-      .map {|adjacent_numbers| adjacent_numbers.map {|a| a.value} .reduce(1, :*)}
+      .hash {|adjacent_numbers| adjacent_numbers.hash {|a| a.value}.reduce(1, :*)}
   end
   attr_accessor :engine_lines
 end
@@ -190,6 +190,6 @@ input_content = File.open(input_file_name).read
 
 engine = Engine.deserialize input_content
 
-puts engine.extract_engine_numbers_that_touches_symbols.map {|e| e.value} .sum
+puts engine.extract_engine_numbers_that_touches_symbols.hash {|e| e.value}.sum
 puts engine.get_gear_ratios.sum
 

src/advent/day3_test.rb

@@ -67,7 +67,7 @@ class EngineLineTest < Test::Unit::TestCase
   def test_extract_engine_numbers
     engine = Engine.deserialize @@easy_engine
     expt = [467, 114, 35, 633, 617, 58, 592, 755, 664, 598]
-    assert_equal expt, engine.extract_engine_numbers.map {|e| e.value}
+    assert_equal expt, engine.extract_engine_numbers.hash {|e| e.value}
   end
 
   def test_touches_symbol
@@ -79,7 +79,7 @@ class EngineLineTest < Test::Unit::TestCase
   def test_extract_engine_numbers_that_touches_symbols
     engine = Engine.deserialize @@easy_engine
     expt = [467, 35, 633, 617, 592, 755, 664, 598]
-    assert_equal expt, engine.extract_engine_numbers_that_touches_symbols.map {|e| e.value}
+    assert_equal expt, engine.extract_engine_numbers_that_touches_symbols.hash {|e| e.value}
   end
 
   def test_empty
@@ -96,14 +96,14 @@ class EngineLineTest < Test::Unit::TestCase
 .........."
     engine = Engine.deserialize input
     expt = []
-    assert_equal expt, engine.extract_engine_numbers_that_touches_symbols.map {|e| e.value}
+    assert_equal expt, engine.extract_engine_numbers_that_touches_symbols.hash {|e| e.value}
   end
 
 
   def test_day_3_part_1_easy
     engine = Engine.deserialize @@easy_engine
     expt = 4361
-    assert_equal expt, engine.extract_engine_numbers_that_touches_symbols.map {|e| e.value} .sum
+    assert_equal expt, engine.extract_engine_numbers_that_touches_symbols.hash {|e| e.value}.sum
   end
 
   def test_extract_gears

src/advent/day4.rb

@@ -19,8 +19,8 @@ class Card
   def self.deserialize(line)
     id_match = /Card\s+(\d+)/.match(line)
     id = id_match[1].to_i
-    winning_numbers = line[(line.index(":") + 1)..(line.index("|") - 1)].split(/\s+/).filter {|x| !x.empty?}.map {|x| x.to_i}
+    winning_numbers = line[(line.index(":") + 1)..(line.index("|") - 1)].split(/\s+/).filter {|x| !x.empty?}.hash {|x| x.to_i}
-    selected_numbers = line[(line.index("|") + 1)..line.length].split(/\s+/).filter {|x| !x.empty?}.map {|x| x.to_i}
+    selected_numbers = line[(line.index("|") + 1)..line.length].split(/\s+/).filter {|x| !x.empty?}.hash {|x| x.to_i}
     Card.new id, selected_numbers, winning_numbers
   end
 
@@ -40,12 +40,12 @@ class Cards
     cards = ser
               .split("\n")
               .filter {|line| !line.empty?}
-              .map {|line| Card.deserialize line}
+              .hash {|line| Card.deserialize line}
     self.new cards
   end
 
   def scores
-    @cards.map {|card| card.score}
+    @cards.hash {|card| card.score}
   end
 
   def scratchcards_generated_by_card(card)
@@ -57,7 +57,7 @@ class Cards
     if score > 0
       sub_cards = @cards.filter {|sub_card| sub_card.id > card.id and sub_card.id <= card.id + score }
       ret += sub_cards
-                  .map {|sub_card| scratchcards_generated_by_card(sub_card)}
+                  .hash {|sub_card| scratchcards_generated_by_card(sub_card)}
                   .flatten
     end
     @scratchcards_generated_by_card_cache[card.id] = ret

src/advent/day5.rb

@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+class WeirMapRange
+  def initialize(destination, source, range_length)
+    @destination = destination
+    @source = source
+    @range_length = range_length
+  end
+
+  def includes_source?(source)
+    @source <= source and source <= (@source + @range_length)
+  end
+
+  def destination_for_source(source)
+    @destination + (source - @source)
+  end
+
+  def self.deserialize(ser)
+    parts = ser.strip.split(/\s+/).map {|p| p.to_i}
+    self.new parts[0], parts[1], parts[2]
+  end
+
+  attr_accessor :destination
+  attr_accessor :source
+  attr_accessor :range_length
+end
+
+class WeirdMap
+  def initialize(weird_map_ranges)
+    @weird_map_ranges = weird_map_ranges
+  end
+
+  def [](source)
+    @weird_map_ranges.each do |wmr|
+      if wmr.includes_source? source
+        return wmr.destination_for_source source
+      end
+    end
+    source
+  end
+
+  def self.deserialize(ser)
+    wmr = ser.strip.split("\n")
+       .filter {|line| !line.empty?}
+       .map {|line| WeirMapRange.deserialize line}
+    self.new wmr
+  end
+end
+
+
+class TodoMap
+  def initialize(from, to, hash)
+    @from = from
+    @to = to
+    @hash = hash
+  end
+
+  def self.deserialize(ser)
+    ser = ser.strip
+    from_to =ser[(0...ser.index(/\s+/))].split("-")
+    weird_map_ser = ser[ser.index("\n")..ser.length]
+    self.new from_to[0], from_to[2], WeirdMap.deserialize(weird_map_ser)
+  end
+
+  def [](source)
+    @hash[source]
+  end
+
+  attr_accessor :from
+  attr_accessor :to
+  attr_accessor :hash
+end
+
+class PlanningMaps
+  def initialize(seeds, toto_maps)
+    @seeds = seeds
+    @toto_maps = toto_maps
+  end
+
+  def [](source)
+    ret = source
+    @toto_maps.each {|tm| ret = tm[ret]}
+    ret
+  end
+
+  def self.deserialize(ser)
+    blocks = ser.strip.split(/^$/)
+    seeds = blocks[0].split(" ")[(1..)].map {|s| s.to_i}
+    toto_maps = blocks[(1..)].map {|b| TodoMap.deserialize b}
+    self.new seeds, toto_maps
+  end
+
+  def min_destinations
+    @seeds.map {|seed| self[seed]}
+          .min
+  end
+
+  attr_accessor :seeds
+end
+
+
+if __FILE__ == $0
+  input_file_name = File.join(File.dirname(__FILE__), "day_5_input.txt")
+  input_content = File.open(input_file_name).read
+  pms = PlanningMaps.deserialize input_content
+
+  puts "Solution to part 1: #{pms.min_destinations}"
+
+end

src/advent/day5_test.rb

@@ -0,0 +1,96 @@
+# frozen_string_literal: true
+
+require 'test/unit'
+require_relative './day5'
+
+
+class TestWeirMapRange < Test::Unit::TestCase
+  def test_deserialize
+    wmr = WeirMapRange.deserialize "37 52 2"
+
+    assert_equal 37, wmr.destination
+    assert_equal 52, wmr.source
+    assert_equal 2, wmr.range_length
+  end
+end
+
+
+class TestWeirdMap < Test::Unit::TestCase
+  def test_deserialize
+    ser = "
+50 98 2
+52 50 48"
+    wm = WeirdMap.deserialize ser
+    assert_equal 0, wm[0]
+    assert_equal 48, wm[48]
+    assert_equal 49, wm[49]
+    assert_equal 52, wm[50]
+    assert_equal 53, wm[51]
+    assert_equal 98, wm[96]
+    assert_equal 99, wm[97]
+    assert_equal 50, wm[98]
+    assert_equal 51, wm[99]
+  end
+end
+
+class TestTodoMap < Test::Unit::TestCase
+  def test_deserialize
+    ser = "
+light-to-temperature map:
+45 77 23
+81 45 19
+68 64 13"
+    tm = TodoMap.deserialize ser
+    assert_equal "light", tm.from
+    assert_equal "temperature", tm.to
+    assert_equal 86, tm[50]
+
+  end
+end
+
+
+class TestPlanningMaps < Test::Unit::TestCase
+  @@easy_input = "seeds: 79 14 55 13
+
+seed-to-soil map:
+50 98 2
+52 50 48
+
+soil-to-fertilizer map:
+0 15 37
+37 52 2
+39 0 15
+
+fertilizer-to-water map:
+49 53 8
+0 11 42
+42 0 7
+57 7 4
+
+water-to-light map:
+88 18 7
+18 25 70
+
+light-to-temperature map:
+45 77 23
+81 45 19
+68 64 13
+
+temperature-to-humidity map:
+0 69 1
+1 0 69
+
+humidity-to-location map:
+60 56 37
+56 93 4"
+
+  def test_deserialization
+    pms = PlanningMaps.deserialize @@easy_input
+    assert_equal [79, 14, 55, 13], pms.seeds
+  end
+
+  def test_day_4_part_1
+    pms = PlanningMaps.deserialize @@easy_input
+    assert_equal 2, pms.min_destinations
+  end
+end

src/advent/day_5_input.txt

@@ -0,0 +1,219 @@
+seeds: 2041142901 113138307 302673608 467797997 1787644422 208119536 143576771 99841043 4088720102 111819874 946418697 13450451 3459931852 262303791 2913410855 533641609 2178733435 26814354 1058342395 175406592
+
+seed-to-soil map:
+1270068015 1235603193 242614277
+13415696 1478217470 21049126
+825250550 1160341941 75261252
+3786189027 1971702238 242038712
+3191605340 3433644052 172752250
+2389904665 3088515862 345128190
+0 1499266596 13415696
+1197451933 0 72616082
+2139929050 1721726623 249975615
+900511802 222541761 147014452
+1047526254 72616082 149925679
+34464822 980591812 179750129
+2735032855 2631943377 456572485
+3364357590 3606396302 421831437
+214214951 369556213 611035599
+1721726623 2213740950 418202427
+
+soil-to-fertilizer map:
+226793587 358613369 356867344
+0 1838890301 226793587
+2741010192 0 358613369
+2257843811 715480713 173982825
+3099623561 1264222741 3082010
+1810570233 2912833547 326150077
+4038242924 3815312886 256724372
+2431826636 3268919687 279247493
+866869902 1671637223 167253078
+3102705571 889463538 374759203
+1615333950 2646894858 125679350
+2136720310 1550513722 121123501
+3477464774 2772574208 140259339
+1034122980 2065683888 581210970
+2711074129 3238983624 29936063
+583660931 1267304751 283208971
+1741013300 3548167180 69556933
+3815312886 4072037258 222930038
+
+fertilizer-to-water map:
+2197389106 1911800263 305927673
+3117278994 244526473 20512291
+2957263700 4069704360 136102838
+1536592951 2749121858 245216219
+3093366538 840656765 23912456
+815267737 2718368501 30753357
+3137791285 3392529258 82147206
+3770129899 390297301 198889495
+2168252150 2217727936 29136956
+770420674 2367771416 44847063
+3304122356 4205807198 44047643
+94626393 318562852 71734449
+2518697514 2262245627 10899396
+1967704281 265038764 53524088
+846021094 2994338077 264934624
+1215514867 3881882833 187821527
+1781809170 2556752263 100818318
+1882627488 1690877042 85076793
+208796777 631622731 209034034
+2583608714 3508227847 39876494
+519341481 1587040614 19652563
+599791964 104559149 139967324
+3430004623 1246915338 340125276
+1110955718 0 104559149
+2623485208 3548104341 333778492
+1403336394 3259272701 133256557
+0 2273145023 94626393
+2529596910 1857788459 54011804
+166360842 589186796 42435935
+3219938491 1606693177 84183865
+2165362153 3505337850 2889997
+2021228369 2412618479 72557496
+538994044 2657570581 60797920
+739759288 3474676464 30661386
+417830811 1154801218 92114120
+509944931 864569221 9396550
+2093785865 2485175975 71576288
+3969019394 873965771 280835447
+2503316779 2246864892 15380735
+3348169999 1775953835 81834624
+
+water-to-light map:
+3059617387 1101868951 93963271
+2772853640 2098642805 169363292
+193287974 683814429 1482323
+3780234682 1734000399 364642406
+194770297 193287974 490526455
+3550500423 902417243 199451708
+3466829263 2268006097 83671160
+3379471616 2976813583 87357647
+2283311570 2369871058 489542070
+3768145932 1195832222 12088750
+1202605712 3064171230 1080705858
+2942216932 2859413128 107440729
+3749952131 2351677257 18193801
+3049657661 2966853857 9959726
+902417243 1433811930 300188469
+3153580658 1207920972 225890958
+
+light-to-temperature map:
+1088722200 1345179841 10000894
+4202170199 3029124889 92797097
+3016749137 3130683307 53232372
+534766220 331633133 9297796
+190275035 286706851 44926282
+3069981509 1355180735 96127340
+1579189291 3913052943 379484702
+3918942962 3793498681 21754451
+262413801 377451173 88614642
+2452226090 2443004441 143726844
+1958673993 2586731285 188604820
+2595952934 3815253132 97799811
+882433672 754981589 206288528
+608195463 3121921986 8761321
+393888178 145828809 140878042
+3166108849 1530740045 97835767
+351028443 139489318 6339491
+3410232629 961270117 222147493
+2449796439 4292537645 2429651
+2401067597 1890048598 48728842
+3263944616 2376148398 66856043
+3330800659 1451308075 79431970
+3632380122 2019388074 205952206
+1548873457 1323582243 21597598
+2693752745 2225340280 142089882
+357367934 340930929 36520244
+0 493278299 50785717
+768194739 645497224 68742488
+2876584504 1183417610 140164633
+235201317 466065815 27212484
+1570471055 2367430162 8718236
+2147278813 2775336105 253788784
+874238988 3335153634 8194684
+2835842627 714239712 40741877
+3838332328 1938777440 80610634
+50785717 0 139489318
+616956784 3183915679 151237955
+836937227 608195463 37301761
+1098723094 3343348318 450150363
+3940697413 1628575812 261472786
+
+temperature-to-humidity map:
+3865679795 3411240257 137388137
+0 569718370 128927628
+2284256983 1093255418 349419361
+2189606444 2745948834 16886013
+3861728218 3796217004 3951577
+700036088 2134161201 67667679
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+4003067932 4146768977 27598493
+569558723 2311178479 130477365
+4125126694 3887925067 11822916
+1884679865 1442674779 129657290
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+862461784 1577785221 531688422
+4030666425 4120171499 26597478
+195554894 115268399 39538402
+235093296 235252943 334465427
+2132287170 698645998 57319274
+4158735055 3550090086 136232241
+2206492457 157488417 77764526
+3562496130 3899747983 220423516
+2653485248 2201828880 109349599
+2014337155 154806801 2681616
+1580787383 2536413861 97415145
+3453031511 3880534101 7390966
+1394150206 2633829006 45492562
+4057263903 3686322327 7821024
+4157273363 3548628394 1461692
+3460422477 3694143351 102073653
+4136949610 3800168581 20323753
+1678202528 872422329 206477337
+1556099825 2109473643 24687558
+128927628 2679321568 66627266
+2017018771 0 115268399
+4065084927 3820492334 60041767
+3411240257 4253176042 41791254
+767703767 2441655844 94758017
+1439642768 755965272 116457057
+3782919646 4174367470 78808572
+
+humidity-to-location map:
+347042062 4204488573 2962316
+877642375 2878291222 23518224
+3638916554 3484768713 5466055
+2890676240 3280663590 83564486
+201731623 3228655138 52008452
+1692198890 1946017811 25211210
+1717410100 1270737209 92827656
+3598929376 3630765534 39987178
+2226479211 1578430526 262844314
+687169155 3670752712 117494406
+3884728324 1515480569 62949957
+3494186405 1841274840 104742971
+2753482998 2630924017 120642845
+572458731 2235388494 114710424
+3947678281 3490234768 140530766
+3433348031 3167816764 60838374
+350004378 2406580589 222454353
+804663561 1442501755 72978814
+4132461733 2901809446 35781203
+4088209047 2937590649 38937925
+1441554453 2350098918 56481671
+3644382609 201731623 240345715
+2489323525 1971229021 264159473
+2974240726 3086380958 81435806
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+901160599 4207450889 87516407
+988677006 442077338 350976352
+1498036124 3369542837 115225876
+1810237756 3788247118 416241455
+1613262000 1363564865 78936890
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+3431458956 2629034942 1889075
+4168242936 2751566862 126724360