Basketball Website

10 Points

access-behaviour

Instructions

You are working with a web development team to maintain a website for a local basketball team. The web development team is less familiar with Elixir and is asking for a function to be able to extract data from a series of nested maps to facilitate rapid development.

1. Extract data from a nested map structure

Implement the extract_from_path/2 function to take two arguments:

data: a nested map structure with data about the basketball team.
path: a string consisting of period-delimited keys to obtain the value associated with the last key.

If the value or the key does not exist at any point in the path, nil should be returned

data = %{
  "team_mascot" => %{
    "animal" => "bear",
    "actor" => %{
      "first_name" => "Noel"
    }
  }
}

BasketballWebsite.extract_from_path(data, "team_mascot.animal")
# => "bear"
BasketballWebsite.extract_from_path(data, "team_mascot.colors")
# => nil

Use the Access Behaviour when implementing this function.

Do not use any Map or Kernel module functions for working with the nested map data structure.

2. Refactor using included functions

Your coworker reviewing your code tells you about a Kernel module function which does something very similar to your implementation.

Implement get_in_path/2 to use this Kernel module function.

The arguments expected are the same as part 1.

BasketballWebsite.get_in_path(data, "team_mascot.actor.first_name")
# => "Noel"

elixir