basic_streams_implementation.js

// Simple example to read a file line by line and multiply values by 2 and write
// to an output file
'use strict';

const stream = require('stream');
// const readStream = new ReadStream({
//   read(size) {
//     if ()
//   }
// });
const input = process.stdin;
const output = new stream.Writable({
  write(chunk, enc, cb) {
    process.stdout.write(`${chunk}: ${chunk.length}`);
    cb();
  }
});

input.on('end', () => {
  console.log('Bye!');
});

input.pipe(output);