Cleaning

day18/main.exs

@@ -11,6 +11,7 @@ defmodule Day18 do
 
     map_list1 = Enum.take(map_list, 1024)
 
+    # create the grid as a map
     map1 =
       Enum.reduce(0..(height - 1), %{}, fn row, acc ->
         Enum.reduce(0..(width - 1), acc, fn col, acc2 ->
@@ -29,10 +30,9 @@ defmodule Day18 do
     {_path, shortest} = walk(map1, q, dest, visited, [], 100_000_000_000, width, height)
     dbg(shortest)
 
+    # count up from 1024 and create a new map each time, until we create an impassable map
     part2 =
       Enum.reduce(1024..length(map_list), nil, fn idx, acc ->
-        dbg(idx)
-
         if !is_nil(acc) do
           # exit early, we already found the coord
           acc
@@ -57,7 +57,6 @@ defmodule Day18 do
           q = :queue.from_list([{start, 0, [{0, 0}]}])
 
           res = walk(map, q, dest, visited, [], 100_000_000_000, width, height)
-          dbg(res)
 
           if is_nil(res) do
             List.last(map_list)
@@ -112,38 +111,6 @@ defmodule Day18 do
       end
     end
   end
-
-  defp render(map, location \\ nil, visited \\ %{}) do
-    width = Map.keys(map) |> Enum.map(&elem(&1, 1)) |> Enum.max()
-    height = Map.keys(map) |> Enum.map(&elem(&1, 0)) |> Enum.max()
-
-    Enum.each(0..height, fn row ->
-      Enum.each(0..width, fn col ->
-        el = if Map.get(map, {col, row}, :wall) == :wall, do: "#", else: "."
-
-        visited? = Map.has_key?(visited, {col, row})
-
-        formatted =
-          if location == {col, row} do
-            IO.ANSI.format([:red_background, "@"])
-          else
-            if visited? do
-              IO.ANSI.format([:blue_background, el])
-            else
-              el
-            end
-          end
-
-        IO.write(formatted)
-      end)
-
-      IO.write("\n")
-    end)
-
-    IO.write("\n")
-
-    map
-  end
 end
 
 Day18.run()