1 files changed, 26 insertions, 0 deletions
diff --git a/aoc-2019-elixir/lib/util.ex b/aoc-2019-elixir/lib/util.ex
new file mode 100644
index 0000000..ada31be
--- /dev/null
+++ b/aoc-2019-elixir/lib/util.ex
@@ -0,0 +1,26 @@
+defmodule Util.Integer do
+  @spec parse!(binary) :: integer
+  def parse!(binary) do
+    {integer, _remainder} = Integer.parse(binary)
+    integer
+  end
+end
+
+defmodule Util.Input do
+  @spec read_text(binary) :: binary
+  def read_text(filename) do
+    File.read!("data/#{filename}.txt")
+  end
+
+  @spec read_lines(binary) :: [binary]
+  def read_lines(filename) do
+    filename |> read_text() |> String.split()
+  end
+
+  @spec read_numbers(binary) :: [integer]
+  def read_numbers(filename) do
+    filename
+    |> read_lines()
+    |> Enum.map(&Util.Integer.parse!/1)
+  end
+end