Arun205

// Accepts the array and key
const groupBy = (array, key) => {
  // Return the end result
  return array.reduce((result, currentValue) => {
    // If an array already present for key, push it to the array. Else create an array and push the object
    (result[currentValue[key]] = result[currentValue[key]] || []).push(
      currentValue
    );
    // Return the current iteration `result` value, this will be taken as next iteration `result` value and accumulate
    return result;

Arun205

public void loadProducts() {

		InputStream inputStream = getFileFromResourceAsStream("products.csv");
		try (InputStreamReader streamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
				BufferedReader reader = new BufferedReader(streamReader)) {

			String line;
			line = reader.readLine();
			line = reader.readLine();
			while ((line = reader.readLine()) != null) {