Add new Elixir template

template/dayN.exs

@@ -0,0 +1,48 @@
+defmodule DayREPLACE_ME do
+  def part1(input) do
+    input
+  end
+
+  def part2(input) do
+    input
+  end
+
+  def run do
+    with [input_filename] <- System.argv(),
+         {:ok, input} <- File.read(input_filename) do
+      run_parts_with_timer(input)
+    else
+      _ -> print_usage()
+    end
+  end
+
+  def run_parts_with_timer(input) do
+    {p1_microsecs, p1_result} = :timer.tc(fn -> part1(input) end)
+    IO.puts("Part 1 (completed in #{format_time(p1_microsecs)}):")
+    IO.write("\n")
+    IO.puts(p1_result)
+    IO.write("\n")
+
+    {p2_microsecs, p2_result} = :timer.tc(fn -> part2(input) end)
+    IO.puts("Part 2 (completed in #{format_time(p2_microsecs)}):")
+    IO.write("\n")
+    IO.puts(p2_result)
+  end
+
+  defp format_time(μsec) when μsec < 1_000, do: "#{μsec}μs"
+  defp format_time(μsec) when μsec < 1_000_000, do: "#{μsec / 1000}ms"
+  defp format_time(μsec) when μsec < 60_000_000, do: "#{μsec / 1_000_000}s"
+
+  defp format_time(μsec) when μsec < 3_660_000_000 do
+    total_secs = round(μsec / 1_000_000)
+    mins = div(total_secs, 60)
+    secs = rem(total_secs, 60)
+    "#{mins}m#{secs}s"
+  end
+
+  defp print_usage do
+    IO.puts("Usage: elixir dayREPLACE_ME.exs input_filename")
+  end
+end
+
+DayREPLACE_ME.run()

template/dayNpart1.exs

@@ -1,9 +0,0 @@
-defmodule DayREPLACE_MEPart1 do
-  def run do
-    File.read!("input")
-    |> String.split("\n", trim: true)
-    |> IO.inspect()
-  end
-end
-
-DayREPLACE_MEPart1.run()