Instructions

In this exercise, you're implementing a way to keep track of the high scores for the most popular game in your local arcade hall.

1. Define a new high score map

To make a new high score map, define the HighScore.new/0 function which doesn't take any arguments and returns a new, empty map of high scores.

2. Add players to the high score map

To add a player to the high score map, define HighScore.add_player/3, which is a function which takes 3 arguments:

• The first argument is the map of scores.
• The second argument is the name of a player as a string.
• The third argument is the score as an integer. The argument is optional, implement the third argument with a default value of 0.

Store the default initial score in a module attribute. It will be needed again.

3. Remove players from the score map

To remove a player from the high score map, define HighScore.remove_player/2, which takes 2 arguments:

• The first argument is the map of scores.
• The second argument is the name of the player as a string.

4. Reset a player's score

To reset a player's score, define HighScore.reset_score/2, which takes 2 arguments:

• The first argument is the map of scores.
• The second argument is the name of the player as a string, whose score you wish to reset.

The function should also work if the player doesn't have a score.

5. Update a player's score

To update a player's score by adding to the previous score, define HighScore.update_score/3, which takes 3 arguments:

• The first argument is the map of scores.
• The second argument is the name of the player as a string, whose score you wish to update.
• The third argument is the score that you wish to add to the stored high score.

The function should also work if the player doesn't have a previous score - assume the previous score is 0.

6. Get a list of players

To get a list of players, define HighScore.get_players/1, which takes 1 argument:

• The first argument is the map of scores.