ES6-Original-Module-Demo

module-demo.js

import fs from 'fs'
import readline from 'readline'
import path from 'path'

const noop = () => false

let Module = {
	readLineInFile(filename, cb = noop, done = noop){
    	let rl = readline.createInterface({
        	input: fs.createReadStream(path.resolve(__dirname, './big_file.txt'))
        })
        
        rl.on('line', line=> cb(line))
        rl.on('close', done)
        return rl
    }
}

export default Module