PF is a renown firewall application that is maintained upstream by the security-driven OpenBSD project. It is more accurately expressed as a packet filtering tool, hence the name, and it is known for its simple syntax...

In this tutorial, we will see how to upload a photo to an Express app and manipulate it (resize, crop, greyscale, etc) before writing it to storage.

Koa is a new web framework created by the team behind Express. It aims to be a modern and more minimalist version of Express. Some of its characteristics are its support and reliance on new JavaScript features such as...

The MERN stack consists of MongoDB, Express, React / Redux, and Node.js. The MERN stack is one of the most popular JavaScript stacks for building modern single-page web applications.

Replacing text in strings is a common task in JavaScript. In this article you'll look at using replace and regular expressions to replace text.

GraphQL is a specification and therefore language agnostic. When it comes GraphQL development with Node.js, there are various options available ranging from graphql-js, express-graphql, to apollo-server. In this tutor...

The Node.js Read-Eval-Print-Loop (REPL) is an interactive shell that processes Node.js expressions. The shell reads JavaScript code the user enters, evaluates the result of interpreting the line of code, prints the re...

TensorFlow is open-source machine learning software used to train neural networks.TensorFlow's neural networks are expressed in the form of stateful dataflow graphs. Each node in the graph...

In this tutorial, you'll install Hadoop in stand-alone mode on a Debian 9 server. You'll also run an example MapReduce program to search for occurrences of a regular expression in text files.

In this tutorial, you'll learn how to install Hadoop in stand-alone mode on an Ubuntu 18.04 server. You'll also run an example MapReduce program to search for occurrences of a regular expression in text files.

ARCHIVED: MEAN is a quick start boilerplate for creating applications based on MongoDB, Node.js, Express, and AngularJS. DigitalOcean's MEAN One-Click Application pre-installs the Mean.js implementation of the stack. ...

ARCHIVED: MongoDB is a highly-scalable NoSQL database with a document-based data model and an expressive query language. DigitalOcean's MongoDB One-Click application allows you to quickly spin up a droplet with MongoD...

This tutorial will give an insight to regular expressions without going into particularities of any language. We will simply use egrep to explain the concepts. Regular expressions are templates to match patterns (or s...

Use these instructions to setup an Ubuntu server to run Node.js applications, including apps based on Express, Geddy, or Sails. This will help you avoid some security mistakes and will provide some surprising benefits.

Learn how to install Express and set up Socket.io on a VPS.

This tutorial will cover how to use regular expressions to explore the power of the "grep" command. Grep is a tool used to search for specified patterns within text input using regular expressions. Regular expressio...

This article outlines the steps necessary to run a "Hello world" in node.js + express, running on a 64bit Centos 6.4 installation.

GraphQL is a query language created with the purpose of building client applications based on intuitive and flexible syntax for describing their data requirements and interactions. In this tutorial, we are going to im...