This project is my answer to the question asked for Intercom technical screener.
We have some customer records in a text file (customers.json) -- one customer per line, JSON-encoded. We want to invite any customer within 100km of our Dublin office for some food and drinks on us. Write a program that will read the full list of customers and output the names and user ids of matching customers (within 100km), sorted by User ID (ascending).
- You can use the first formula from this Wikipedia article to calculate distance. Don't forget, you'll need to convert degrees to radians.
- The GPS coordinates for our Dublin office are 53.339428, -6.257664.
- You can find the Customer list here.
⭑ Please don’t forget, your code should be production ready, clean and tested!
- Install Node.js® 8+ with npm
- Clone the repo:
git clone https://github.com/fabrice404/intercom-party.git - Install dependencies:
npm install
To launch tests use this command: npm test
To run the app use this command: npm start, it will run with default values given in the question, these values can be overridden with arguments.
| Argument | Description | Example |
|---|---|---|
| --lat | Latitude of the party location | npm start -- --lat 12.34 |
| --lng | Longitude of the party location | npm start -- --lng 56.78 |
| --distance | Max distance between customer and party location (km) | npm start -- --distance 50 |
| --file | Customer file path | npm start -- --file /tmp/customers-MMXVIII.json |
Example: npm start -- --lat 12.34 --lng 56.78 --distance 50 --file /tmp/customers-MMXVIII.json