The program returns the top N most frequently occurring words in the file hosted at http://terriblytinytales.com/test.txt

• Download NodeJs from https://nodejs.org
• Install latest vesrion of NPM

sudo apt-get install npm

• For Database, download mongoDB from https://www.mongodb.com/download-center

• Clone the repository from GitHub.
• Go to the repo folder through Terminal.
• Run the following commands to install dependencies and run the program

npm install
npm start

• App will run on localhost machine with 8000 port at http://localhost:8000.

• Express : Node's framework, makes it easier to use.
• Body Parser : To parse the data from HTML Form
• Request : To send a request to http://terriblytinytales.com/test.txt
• Mocha : Testing framework for Nodejs
• Chai : Assertion library for tests

This function takes an array of words as a parameter and returns an array with the even indexes containing the words and the immediately next odd indexes containing their frequencies.

frequency(arr); //where arr is the array of words

This function takes a data string and an integer N and returns the top N most frequently occurring words in the string.

convert(data, N); //where data is the data string and N is the integer.

The function is explained more with inline comments in the code.

Tests are run on a sample string and array that is defined in the file test.js itself. To run the tests, use the following command.

npm test

All the tests are self-explanatory and run perfectly. Below is a screenshot attached.