solve 2023 1.2

2023/elixir/config/config.exs

@@ -3,7 +3,6 @@ import Config
 config :advent_of_code_utils,
   auto_compile?: true,
   time_calls?: true,
-  gen_tests?: true,
   session: System.get_env("ADVENT_OF_CODE_SESSION")
 
 config :iex, inspect: [charlists: :as_lists]

2023/elixir/lib/2023/1.ex

@@ -2,26 +2,98 @@ import AOC
 
 aoc 2023, 1 do
   def p1(input) do
-    input
-    |> String.split("\n")
-    |> Stream.map(&get_first_and_last_numbers_as_number/1)
+    lines = String.split(input, "\n")
+
+    firsts =
+      lines
+      |> Stream.map(&to_digits/1)
+      |> Stream.map(&List.first/1)
+
+    lasts =
+      lines
+      |> Stream.map(&String.reverse/1)
+      |> Stream.map(&to_digits/1)
+      |> Stream.map(&List.first/1)
+
+    Stream.zip_with(firsts, lasts, &digits_to_number/2)
     |> Enum.sum()
   end
 
-  def p2(_input) do
+  def p2(input) do
+    lines = String.split(input, "\n")
+
+    firsts =
+      lines
+      |> Stream.map(&to_digits_2/1)
+      |> Stream.map(&List.first/1)
+
+    lasts =
+      lines
+      |> Stream.map(&String.reverse/1)
+      |> Stream.map(&to_digits_3/1)
+      |> Stream.map(&List.first/1)
+
+    Stream.zip_with(firsts, lasts, &digits_to_number/2)
+    |> Enum.sum()
   end
 
-  def get_first_and_last_numbers_as_number(str) do
-    trimmed =
-      str
-      |> String.replace(~r/^[^\d]+/, "")
-      |> String.reverse()
-      |> String.replace(~r/^[^\d]+/, "")
-      |> String.reverse()
+  def digits_to_number(f, l), do: String.to_integer("#{f}#{l}")
 
-    first = String.first(trimmed)
-    last = String.last(trimmed)
+  def to_digits(""), do: []
+  def to_digits("1" <> rest), do: [1 | to_digits(rest)]
+  def to_digits("2" <> rest), do: [2 | to_digits(rest)]
+  def to_digits("3" <> rest), do: [3 | to_digits(rest)]
+  def to_digits("4" <> rest), do: [4 | to_digits(rest)]
+  def to_digits("5" <> rest), do: [5 | to_digits(rest)]
+  def to_digits("6" <> rest), do: [6 | to_digits(rest)]
+  def to_digits("7" <> rest), do: [7 | to_digits(rest)]
+  def to_digits("8" <> rest), do: [8 | to_digits(rest)]
+  def to_digits("9" <> rest), do: [9 | to_digits(rest)]
+  def to_digits(<<_::binary-size(1), rest::binary>>), do: to_digits(rest)
 
-    String.to_integer(first <> last)
-  end
+  def to_digits_2(""), do: []
+  def to_digits_2("1" <> rest), do: [1 | to_digits_2(rest)]
+  def to_digits_2("one" <> rest), do: [1 | to_digits_2(rest)]
+  def to_digits_2("2" <> rest), do: [2 | to_digits_2(rest)]
+  def to_digits_2("two" <> rest), do: [2 | to_digits_2(rest)]
+  def to_digits_2("3" <> rest), do: [3 | to_digits_2(rest)]
+  def to_digits_2("three" <> rest), do: [3 | to_digits_2(rest)]
+  def to_digits_2("4" <> rest), do: [4 | to_digits_2(rest)]
+  def to_digits_2("four" <> rest), do: [4 | to_digits_2(rest)]
+  def to_digits_2("5" <> rest), do: [5 | to_digits_2(rest)]
+  def to_digits_2("five" <> rest), do: [5 | to_digits_2(rest)]
+  def to_digits_2("6" <> rest), do: [6 | to_digits_2(rest)]
+  def to_digits_2("six" <> rest), do: [6 | to_digits_2(rest)]
+  def to_digits_2("7" <> rest), do: [7 | to_digits_2(rest)]
+  def to_digits_2("seven" <> rest), do: [7 | to_digits_2(rest)]
+  def to_digits_2("8" <> rest), do: [8 | to_digits_2(rest)]
+  def to_digits_2("eight" <> rest), do: [8 | to_digits_2(rest)]
+  def to_digits_2("9" <> rest), do: [9 | to_digits_2(rest)]
+  def to_digits_2("nine" <> rest), do: [9 | to_digits_2(rest)]
+
+  def to_digits_2(<<_::binary-size(1), rest::binary>>),
+    do: to_digits_2(rest)
+
+  def to_digits_3(""), do: []
+  def to_digits_3("1" <> rest), do: [1 | to_digits_3(rest)]
+  def to_digits_3("eno" <> rest), do: [1 | to_digits_3(rest)]
+  def to_digits_3("2" <> rest), do: [2 | to_digits_3(rest)]
+  def to_digits_3("owt" <> rest), do: [2 | to_digits_3(rest)]
+  def to_digits_3("3" <> rest), do: [3 | to_digits_3(rest)]
+  def to_digits_3("eerht" <> rest), do: [3 | to_digits_3(rest)]
+  def to_digits_3("4" <> rest), do: [4 | to_digits_3(rest)]
+  def to_digits_3("ruof" <> rest), do: [4 | to_digits_3(rest)]
+  def to_digits_3("5" <> rest), do: [5 | to_digits_3(rest)]
+  def to_digits_3("evif" <> rest), do: [5 | to_digits_3(rest)]
+  def to_digits_3("6" <> rest), do: [6 | to_digits_3(rest)]
+  def to_digits_3("xis" <> rest), do: [6 | to_digits_3(rest)]
+  def to_digits_3("7" <> rest), do: [7 | to_digits_3(rest)]
+  def to_digits_3("neves" <> rest), do: [7 | to_digits_3(rest)]
+  def to_digits_3("8" <> rest), do: [8 | to_digits_3(rest)]
+  def to_digits_3("thgie" <> rest), do: [8 | to_digits_3(rest)]
+  def to_digits_3("9" <> rest), do: [9 | to_digits_3(rest)]
+  def to_digits_3("enin" <> rest), do: [9 | to_digits_3(rest)]
+
+  def to_digits_3(<<_::binary-size(1), rest::binary>>),
+    do: to_digits_3(rest)
 end

2023/elixir/test/2023/1_test.exs

@@ -1,9 +0,0 @@
-import AOC
-
-aoc_test 2023, 1, async: true do
-  describe "p1" do
-    test "works for the example input" do
-      assert p1(example_string()) == 142
-    end
-  end
-end

README.md

@@ -14,7 +14,7 @@
 1. [2020] **17/50** 🌟
 1. [2021] **43/50** 🌟
 1. [2022] **14/50** 🌟
-1. [2023] **1/50** 🌟
+1. [2023] **2/50** 🌟
 
 [2015]: ./2015
 [2017]: ./2017