node_default_modules

var EventEmitter = require('events').EventEmitter;

var emitter = new EventEmitter();

var hello = function(){

    console.log('Hello event Called');

}

var bye = function(){

    console.log('bye event called...');

}

emitter.on('hello', hello);

emitter.on('bye', bye);##registers 'bye' function as listener to hello event ;

emitter.emit('hello');

emitter.emit('bye'); ##triggers 'bye' event.

global.emitter._events; ##lists all event listeners with respective event.

var fs = require('fs');

var dataStream = fs.createReadStream('db.tsv', 'utf8');

var readLine = require('readline').createInterface(dataStream);

readLine.on('line', function (data) {

    console.log(data);

});

readLine.on('end', function(){

    console.log('Reading complete...');

    dataStream.end();

});

var fs = require('fs');

fs.unlinkSync('<FILE TO DELETE>');