With Points

Mix.install([
  {:jason, "~> 1.4"},
  {:kino, "~> 0.9", override: true},
  {:youtube, github: "brooklinjazz/youtube"},
  {:hidden_cell, github: "brooklinjazz/hidden_cell"}
])

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With Points

You’re going to create a Points module which determines the total score of each team in a generic game after three rounds.

game = %{
  team1_name: "Team Team",
  team2_name: "Exersport",
  round1: %{
    team1: 10,
    team2: 20
  },
  round2: %{
    team1: 30,
    team2: 10
  },
  round3: %{
    team1: 25,
    team2: 30
  }
}

Points.tally(game)
%{"Team Team" => 65, "Exersport" => 60}

Use with to ensure the following:

• If the game provided does not have a :team1_name or team2_name keys return {:error, :invalid}.
• If the game does not have a round1, round2, or round3 key, each with :team1 and :team2 keys return {:error, :invalid}.

Example Solution

defmodule Points do
  def tally(game) do
    with %{team1_name: team1, team2_name: team2} <- game,
         %{round1: %{team1: t1r1, team2: t2r1}} <- game,
         %{round2: %{team1: t1r2, team2: t2r2}} <- game,
         %{round3: %{team1: t1r3, team2: t2r3}} <- game do
      %{}
      |> Map.put(team1, t1r1 + t1r2 + t1r3)
      |> Map.put(team2, t2r1 + t2r2 + t2r3)
    else
      error -> 
        IO.inspect(error)
        {:error, :invalid}
    end
  end
end

Enter your solution below.

defmodule Points do
  @doc """
  Tally points in a generic three round game.

  A valid game will return the teams and their total scores in a map.

      iex> game = %{team1_name: "Team Team", team2_name: "Exersport", round1: %{team1: 10, team2: 20}, round2: %{team1: 30, team2: 10}, round3: %{team1: 25, team2: 30}}
      iex> Points.tally(game)
      %{"Team Team" => 65, "Exersport" => 60}

  The `game` must have a `team1_name` and `team2_name` keys.

      iex> Points.tally(%{no_team_names: true})
      {:error, :invalid}

  The `game` must have a `round1`, `round2`, and `round3` keys.

      iex> Points.tally(%{team1_name: "name1", team2_name: "name2"})
      {:error, :invalid}
  """
  def tally(game) do
  end
end

Commit Your Progress

DockYard Academy now recommends you use the latest Release rather than forking or cloning our repository.

Run git status to ensure there are no undesirable changes. Then run the following in your command line from the curriculum folder to commit your progress.

$ git add .
$ git commit -m "finish With Points exercise"
$ git push

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