Guessing Games

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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Guess the Word

Create a word guessing game. Manually bind a guess and an answer. Return "Correct" if the guess is equal to the answer, and otherwise return "Incorrect."

Ensure your solutions works for both an incorrect and correct player guess.

Example Solution

  guess = "hello"
  answer = "hello"

  guess == answer && "Correct!" || "Incorrect."

Enter your solution below.

Bonus: Guess the Random Word

We can use Enum.random/1 to pick a random value from a list.

Enum.random(["hello", "hi", "howdy"])

Armed with this knowledge, you’re going to create a word guessing game.

• Bind a variable guess to the player’s guess as a string.

• Bind a variable answer to a random word (you may create a list of random words to choose from)

• If the guess matches the answer, return "Correct!", otherwise return "Incorrect.".

  Example Solution

  guess = "hello"
  answer = Enum.random(["hello", "hi", "howdy"])
  
  guess == answer && "Correct!" || "Incorrect."

Enter your solution below.

Bonus: Guess the Number

We can generate a random integer between two values by providing a range to Enum.random/1.

Enum.random(1..10)

Now let’s build a number guessing game

• Bind a variable answer to a random integer between 1 and 10.

• Bind a variable guess to the player’s guess.

• If the guess equals answer, return "Correct!".

• If the guess is lower than the answer, return "Too low!".

• If the guess is higher than the answer, return "Too high!".

  Example Solution

  cond allows us to handle several different conditions.

  guess = Enum.random(1..10)
  answer = 7
  
  cond do
    guess == answer -> "Correct!"
    guess < answer -> "Too low!"
    guess > answer -> "Too high!"
  end

  However, we can also solve this problem using purely boolean operators.

  guess = Enum.random(1..10)
  answer = 7
  
  guess == answer &amp;&amp; "Correct" || guess < answer &amp;&amp; "Too low!" || guess > answer &amp;&amp; "Too high!"

  We can optionally simplify the solution by omitting the last condition. However, this could lead to unhandled bugs.

Enter your solution below.

Mark As Completed

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

save_name =
  case Path.basename(__DIR__) do
    "reading" -> "guessing_games_reading"
    "exercises" -> "guessing_games_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 guessing-games-exercise
$ git add .
$ git commit -m "finish guessing games exercise"
$ git push origin guessing-games-exercise

Create a pull request from your guessing-games-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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