Book Image

Node Cookbook - Fourth Edition

By : Bethany Griggs
4 (1)
Book Image

Node Cookbook - Fourth Edition

4 (1)
By: Bethany Griggs

Overview of this book

A key technology for building web applications and tooling, Node.js brings JavaScript to the server enabling full-stack development in a common language. This fourth edition of the Node Cookbook is updated with the latest Node.js features and the evolution of the Node.js framework ecosystems. This practical guide will help you to get started with creating, debugging, and deploying your Node.js applications and cover solutions to common problems, along with tips to avoid pitfalls. You'll become familiar with the Node.js development model by learning how to handle files and build simple web applications and then explore established and emerging Node.js web frameworks such as Express.js and Fastify. As you advance, you'll discover techniques for detecting problems in your applications, handling security concerns, and deploying your applications to the cloud. This recipe-based guide will help you to easily navigate through various core topics of server-side web application development with Node.js. By the end of this Node book, you'll be well-versed with core Node.js concepts and have gained the knowledge to start building performant and scalable Node.js applications.
Table of Contents (14 chapters)

Piping streams

A pipe is a form of one-way redirection. In our Terminal (DOS or Unix-like), we often utilize the pipe operator (|) to pipe the output of one program as the input to another program. For example, we can enter $ ls | head -3 to pipe the output of the ls command to the head -3 command, resulting in the first three files in our directory being returned.

Similar to how we can use the pipe operator in our shells to pipe output between programs, we can use the Node.js pipe() method to pipe data between streams.

In this recipe, we'll learn how to use the pipe() method.

Getting ready

  1. Create a directory to work in:
    $ mkdir piping-streams
    $ cd piping-streams
  2. Start by creating a file named file.txt:
    $ touch file.txt
  3. Add some dummy data to file.txt, such as the following:
    Node.js is a JavaScript runtime built on Google Chrome's V8 JavaScript engine.
    Node.js is a JavaScript runtime built on Google Chrome's V8 JavaScript engine.
    Node.js is a JavaScript...