Day 1 part 1

2022/.gitignore

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+*.beam
+*.ez
+build
+erl_crash.dump

2022/README.md

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+# advent_of_code
+
+[![Package Version](https://img.shields.io/hexpm/v/advent_of_code)](https://hex.pm/packages/advent_of_code)
+[![Hex Docs](https://img.shields.io/badge/hex-docs-ffaff3)](https://hexdocs.pm/advent_of_code/)
+
+A Gleam project
+
+## Quick start
+
+```sh
+gleam run   # Run the project
+gleam test  # Run the tests
+gleam shell # Run an Erlang shell
+```
+
+## Installation
+
+If available on Hex this package can be added to your Gleam project:
+
+```sh
+gleam add advent_of_code
+```
+
+and its documentation can be found at <https://hexdocs.pm/advent_of_code>.

2022/gleam.toml

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+name = "advent_of_code"
+version = "0.1.0"
+
+# Fill out these fields if you intend to generate HTML documentation or publish
+# your project to the Hex package manager.
+#
+# licences = ["Apache-2.0"]
+# description = "A Gleam library..."
+# repository = { type = "github", user = "username", repo = "project" }
+# links = [{ title = "Website", href = "https://gleam.run" }]
+
+[dependencies]
+gleam_stdlib = "~> 0.25"
+gladvent = "~> 0.4"
+
+[dev-dependencies]
+gleeunit = "~> 0.7"

2022/manifest.toml

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+# This file was generated by Gleam
+# You typically do not need to edit this file
+
+packages = [
+  { name = "gladvent", version = "0.4.0", build_tools = ["gleam"], requirements = ["gleam_otp", "gleam_erlang", "gleam_stdlib", "snag", "glint"], otp_app = "gladvent", source = "hex", outer_checksum = "F3030B5A8E9F83DCCE6F09C596D5AF8412996FD336EEA5CD806D739DF07EE15F" },
+  { name = "gleam_erlang", version = "0.17.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "A3BB3D4A6AFC2E34CAB1A4960F0CBBC4AA1A052D5023477D16B848D86E69948A" },
+  { name = "gleam_otp", version = "0.5.2", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "24B88BF1D5B8DEC2525C00ECB65B96D2FD4DC66D8B2BB4D7AD4D12B2CE2A9988" },
+  { name = "gleam_stdlib", version = "0.25.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "AD0F89928E0B919C8F8EDF640484633B28DBF88630A9E6AE504617A3E3E5B9A2" },
+  { name = "gleeunit", version = "0.7.2", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "5F4FBED3E93CDEDB0570D30E9DECB7058C2D327996B78BB2D245C739C7136010" },
+  { name = "glint", version = "0.10.0", build_tools = ["gleam"], requirements = ["shellout", "snag", "gleam_stdlib"], otp_app = "glint", source = "hex", outer_checksum = "540D6435A0CE5C3660769B364CFF9BC98724DF3ED942FA80946A47C653B4ED02" },
+  { name = "shellout", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "shellout", source = "hex", outer_checksum = "310662075CDCB6E3928B03E3FD371B1DDCD691E1C709E606AB02195E36675D4E" },
+  { name = "snag", version = "0.2.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "snag", source = "hex", outer_checksum = "35C63E478782C58236F1050297C2FDF9806A4DD55C6FAF0B6EC5E54BC119342D" },
+]
+
+[requirements]
+gladvent = "~> 0.4"
+gleam_stdlib = "~> 0.25"
+gleeunit = "~> 0.7"

2022/src/advent_of_code.gleam

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+import gladvent
+
+pub fn main() {
+  gladvent.main()
+}

2022/src/days/day_1.gleam

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+import gleam/string
+import gleam/int
+import gleam/list
+import gleam/io
+
+pub fn pt_1(input: String) -> Int {
+  assert Ok(max) =
+    string.split(input, on: "\n")
+    |> aggregate_calories([0])
+    |> list.reduce(int.max)
+  max
+}
+
+pub fn pt_2(input: String) -> Int {
+  todo
+}
+
+fn aggregate_calories(lines: List(String), sums: List(Int)) -> List(Int) {
+  case lines {
+    [] -> sums
+    ["", ..rest] -> aggregate_calories(rest, [0, ..sums])
+    [num, ..rest] -> {
+      assert Ok(calories) = int.parse(num)
+      inc(calories, sums)
+      |> aggregate_calories(rest, _)
+    }
+  }
+}
+
+fn inc(num: Int, sums: List(Int)) -> List(Int) {
+  case sums {
+    // should be unreachable
+    [] -> []
+    [first, ..rest] -> [first + num, ..rest]
+  }
+}

2022/test/advent_of_code_test.gleam

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+import gleeunit
+import gleeunit/should
+
+pub fn main() {
+  gleeunit.main()
+}
+
+// gleeunit test functions end in `_test`
+pub fn hello_world_test() {
+  1
+  |> should.equal(1)
+}