Node Cookbook - Third Edition

How to do it...

We're going to write a simple program that strips all null bytes (bytes with a value of zero) from our file, and saves them in a new file called clean.dat.

First we'll require our dependencies:

const fs = require('fs') const path = require('path') 

Now let's load our generated file into the process:

const cwd = process.cwd() const bytes = fs.readFileSync(path.join(cwd, 'file.dat')) 

Synchronous operationsAlways think twice before using a synchronous API in JavaScript. JavaScript executes in a single threaded event-loop; a long-lasting synchronous operation will delay concurrent logic. We'll explore this more in the There's more... section.

Next, we'll remove null bytes and save:

const clean = bytes.filter(n => n) fs.writeFileSync(path.join(cwd, ...