README.md

Instructions

Your task is to extend existing code with new functionality. The existing code deals with a website for basketball team. The website displays lots of data, but unfortunately what is displayed changes often. As the data is stored in a single object, this is not hard to do, but it is time-consuming and boring. To automate this, the content team can specify which data to display by specifying a path to the data to be displayed in the website's content editor.

The code you'll be working with has a function named extract that takes:

• an object (the Object which data to extract),
• a path (a String with the data's path, separated by dot characters)

The function returns the value within the object that matches the path, returning null if no value was found:

const team = { coach: { name: "Jane" }, name: "Hoop Masters" };

extract(team, "name");
// => "Hoop Masters"

extract(team, "coach.name");
// => "Jane"

The content team is very excited about this new functionality, and has already requested a new feature to be added. They'd like to be able to display data of specific elements in an array.

Your job is to extend the extract function to allow extracting array data. This will be done by adding an indexer after the array property:

const team = {
  players: [
    {
      name: "Becky",
      position: "Point guard"
    },
    {
      name: "Maya",
      position: "Center"
    }
  ]
};

extract(team, "players[0].name");
// => "Becky"

extract(team, "players[1].position");
// => "Center"

If the index does not point to an actual value, null should be returned.