Rock Paper Scissors Lizard Spock

Mix.install([
  {:jason, "~> 1.4"},
  {:kino, "~> 0.8.0", override: true},
  {:youtube, github: "brooklinjazz/youtube"},
  {:hidden_cell, github: "brooklinjazz/hidden_cell"}
])

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Rock Paper Scissors Lizard Spock

YouTube.new("https://www.youtube.com/watch?v=_PUEoDYpUyQ")

You’re going to create a Rock Paper Scissors Lizard Spock game. Rock Paper Scissors Lizard Spock is a more complex adaptation of Rock Paper Scissors.

The rules start the same as normal rock paper scissors.

• Rock beats Scissors.
• Paper beats Rock.
• Scissors beats Paper.

Then we add the following extra rules

• Rock beats Lizard.
• Lizard beats Spock.
• Spock beats Scissors.
• Scissors beats Lizard.
• Lizard beats Paper.
• Paper beats Spock.
• Spock beats Rock.

We’ll represent these choices as atoms :rock, :paper, :scissors, :lizard, :spock.

1. Create a beats?/2 function which determines if once choice beats another.

RockPaperScissorsLizardSpock.beats?(:rock, :lizard) # true

1. Create a play/2 function which determines if player 1 or player 2 won the game.

RockPaperScissorsLizardSpock.play(:rock, :lizard) # "Player 1 Wins!"
RockPaperScissorsLizardSpock.play(:lizard, :rock) # "Player 1 Wins!"
RockPaperScissorsLizardSpock.play(:lizard, :lizard) # "Draw!"

Implement the RockPaperScissorsLizardSpock module as documented.

defmodule RockPaperScissorsLizardSpock do
  @moduledoc """
  Rock Paper Scissors Lizard Spock Game
  """

  @doc """
  Returns `true` if the first guess beats the second, and `false` otherwise.

  ## Winning Examples

    iex> RockPaperScissorsLizardSpock.beats?(:rock, :lizard)
    true

    iex> RockPaperScissorsLizardSpock.beats?(:lizard, :rock)
    false

    iex> RockPaperScissorsLizardSpock.beats?(:rock, :rock)
    false
  """
  def beats?(guess1, guess2) do
  end

  @doc """
  Return "Player 1 Wins!", "Player 2 Wins!", or "Draw" depending on which player guess won.

  ## Examples

    iex> RockPaperScissorsLizardSpock.play(:rock, :lizard)
    "Player 1 Wins!"

    iex> RockPaperScissorsLizardSpock.play(:lizard, :rock)
    "Player 2 Wins!"

    iex> RockPaperScissorsLizardSpock.play(:lizard, :lizard)
    "Player 2 Wins!"
  """
  def play(player1, player2) do
  end
end

Mark As Completed

file_name = Path.basename(Regex.replace(~r/#.+/, __ENV__.file, ""), ".livemd")

save_name =
  case Path.basename(__DIR__) do
    "reading" -> "rock_paper_scissors_lizard_spock_reading"
    "exercises" -> "rock_paper_scissors_lizard_spock_exercise"
  end

progress_path = __DIR__ <> "/../progress.json"
existing_progress = File.read!(progress_path) |> Jason.decode!()

default = Map.get(existing_progress, save_name, false)

form =
  Kino.Control.form(
    [
      completed: input = Kino.Input.checkbox("Mark As Completed", default: default)
    ],
    report_changes: true
  )

Task.async(fn ->
  for %{data: %{completed: completed}} <- Kino.Control.stream(form) do
    File.write!(
      progress_path,
      Jason.encode!(Map.put(existing_progress, save_name, completed), pretty: true)
    )
  end
end)

form

Commit Your Progress

Run the following in your command line from the curriculum folder to track and save your progress in a Git commit. Ensure that you do not already have undesired or unrelated changes by running git status or by checking the source control tab in Visual Studio Code.

$ git checkout -b rock-paper-scissors-lizard-spock-exercise
$ git add .
$ git commit -m "finish rock paper scissors lizard spock exercise"
$ git push origin rock-paper-scissors-lizard-spock-exercise

Create a pull request from your rock-paper-scissors-lizard-spock-exercise branch to your solutions branch. Please do not create a pull request to the DockYard Academy repository as this will spam our PR tracker.

DockYard Academy Students Only:

Notify your teacher by including @BrooklinJazz in your PR description to get feedback. You (or your teacher) may merge your PR into your solutions branch after review.

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