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/**
 * Returns a Promise which resolves with a value in form of a tuple.
 * @param promiseFn A Promise to resolve as a tuple.
 * @returns Promise A Promise which resolves to a tuple of [error, ...results]
 */
export function tuple (promise) {
  return promise
    .then((...results) => [null, ...results])
    .catch(error => [error])
}

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defmodule AdventOfCode2021.Day02 do
  @moduledoc """
  --- Day 2: Dive! ---
  Now, you need to figure out how to pilot this thing.

  It seems like the submarine can take a series of commands like forward 1, down 2, or up 3:

  forward X increases the horizontal position by X units.
  down X increases the depth by X units.
  up X decreases the depth by X units.

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defmodule AdventOfCode2021.Day01 do
  @moduledoc """
  --- Day 1: Sonar Sweep ---
  You're minding your own business on a ship at sea when the overboard alarm goes off! You rush to see if you can help. Apparently, one of the Elves tripped and accidentally sent the sleigh keys flying into the ocean!

  Before you know it, you're inside a submarine the Elves keep ready for situations like this. It's covered in Christmas lights (because of course it is), and it even has an experimental antenna that should be able to track the keys if you can boost its signal strength high enough; there's a little meter that indicates the antenna's signal strength by displaying 0-50 stars.

  Your instincts tell you that in order to save Christmas, you'll need to get all fifty stars by December 25th.

  Collect stars by solving puzzles. Two puzzles will be made available on each day in the Advent calendar; the second puzzle is unlocked when you complete the first. Each puzzle grants one star. Good luck!

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### Keybase proof

I hereby claim:

  * I am 0x6a68 on github.
  * I am 0x6a68 (https://keybase.io/0x6a68) on keybase.
  * I have a public key ASDmTfB7x8vU9rkTy_x_SXJaUEa9n9GL_TXswurkjJXSRwo

To claim this, I am signing this object:

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version: '2'
services:
    postgres:
      image: postgres:9.5
      restart: always
      environment:
       - "POSTGRES_USER=${POSTGRES_USER}"
       - "POSTGRES_PASSWORD=${POSTGRES_PASSWORD}"
       - "POSTGRES_DB=gogs"
      volumes:

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{
  "*.tsx": {
    "alternate": "{dirname}/__tests__/{basename}.test.tsx",
    "type": "source",
    "template": [
      "import type {open} FC {close} from 'react';",
      "",
      "type {basename|camelcase|capitalize}Props = {open}",
      "  property?: unknown;",
      "{close};",

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defmodule MyApp.Foo do
  @on_definition MyApp.SpecToCallback
  
  @spec bar(String.t()) :: String.t()
  def bar(foobar) do
    impl().bar(foobar)
  end
  
  defp impl, do: Application.get_env(:my_app, :my_app_foo_impl, __MODULE__.DefaultImpl)
end

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Commands and Helpers

CAUTION - in examples by tilde (~) we mean a directory where you cloned the repository.

Invoking tests

~ $ mix test

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module Main exposing (main)

import Graphqelm.Operation exposing (RootQuery)
import Graphqelm.Http
import Graphqelm.SelectionSet exposing (SelectionSet, with)
import Html exposing (Html, a, div, h1, h2, p, pre, text)
import RemoteData exposing (RemoteData)
import Github.Object
import Github.Object.User as User
import Github.Query as Query

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query IntrospectionQuery {
  __schema {
    queryType {
      name
    }
    mutationType {
      name
    }
    subscriptionType {
      name