Order Processing Program

This program processes order data and calculates product averages and determines the most popular brands. It reads a CSV file containing order information, performs the required calculations, and generates output files.

Prerequisites

Dart SDK: Make sure you have Dart SDK installed on your machine. You can download it from the official Dart website: https://dart.dev/get-dart

Installation

Clone the repository or download the source code files.
Open a terminal and navigate to the project directory.

Usage

Prepare your order data in a CSV file. The CSV file should have the following columns: OrderID, DeliveryArea, ProductName, Quantity, Brand. Each row represents an order.
Run the program using the Dart SDK by executing the following command in the terminal:

cssCopy code

dart csv_problem.dart" assets/data.csv

Replace <assets/data.csv> with the path to your input CSV file.
The program will process the order data and generate two output files: 0_<input_file_name> and 1_<input_file_name>. These files will contain the calculated product averages and the most popular brands, respectively.
Locate the output files in the same directory as the input CSV file.

Example

Suppose you have an input CSV file named orders.csv with the following contents:

OrderID,DeliveryArea,ProductName,Quantity,Brand 1001,New York,Shirt,2,Brand X 1002,Los Angeles,Shoes,1,Brand Y 1003,Chicago,Shirt,3,Brand X 1004,Houston,Shoes,2,Brand Z

To process the orders and generate the output files, run the following command:

dart main.dart orders.csv

After execution, you will find two output files: 0_orders.csv and 1_orders.csv. These files will contain the calculated product averages and the most popular brands, respectively.

Notes

Make sure the input CSV file is properly formatted with the correct column order and headers.
The program uses the fast_csv package for CSV parsing. If it's not already installed, the program will automatically download and install it during the first run.