This program written in Node.js parses customers.txt file and returns all the customers within 100 Km of Dublin office using the geographical coordinates of the office and the customers. This uses basic great-circle distance formula and its implemeted in Node.js and below are commands to run this program.
npm install
node index.js
npm test
any version greater than v7.6.x. To install Node.js please click on this link https://nodejs.org/en/download/