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Node.js

Node.js is an open-source, cross-platform JavaScript run-time environment for executing JavaScript code server-side.

Precise vs Accurate on Arbitrary-precision Arithmetic

When Math isn't accurate in code Precise vs Accurate So here's a simple example to get you started, punch a simple calculation 0.1 + 0.2 into any calculator, scientific, google, whatever. What result do you get? You should see 0.3 right? The code issues

Only inexperienced developers use infinite loops

A language agnostic look at this common programming pattern. My hope is that once you've read my post you'll never write an infinite loop again. > My favourite number: 8 What are infinite loops I've chosen Python as the language to demonstrate due to

Strategy To Manage Cache At Scale

One of the major challenges we face as modern developers in our infrastructure is how do we cache effectively so that we don't have to perform heavy I/O to serve identical requests. > The application is only as fast as its slowest component, usually that is relational

Correctly checking property exists in JavaScript

While maintaining some code recently I found myself writing out of pure habit Object.hasOwnProperty.call(obj, 'prop') as is expected in almost all OSS I've contributed to, and quickly editing that to just !!obj.prop which I chose because it worked more succinctly in my

Misconception on CPU: Node.js vs PHP blocking web requests

We know the Node.js engine runs our code asynchronously, and we know it does that using an event loop. When Node.js is used to handle web requests it is capable of managing them over each CPU available via its cluster functionality achieving incredible performance over rival server-side languages.

What's new in Node.js 6.0

This new release of node aims to improve performance, reliability, usability and security. Node 6.0 supports 93% of ES6 features. > Only 6 months after Node Foundation announced version 5.0 Announcement can be found here; https://nodejs.org/en/blog/release/v6.0.0/ Support for older versions

Prototypes and Inheritance

Recently I had the unique pleasure of presenting at General Assembly Melbourne, I was asked to share what I knew about Prototypal Inheritance and would like to now share that with you and dive a bit deeper into some examples. What is Prototypal Inheritance Prototypal Inheritance can be succinctly described

Callback Functions Double Executing? Dont Forget To return

Callback Functions Double Executing? A quick example function doSomething(err, result, final){ if(err){ final(err); } final(null,result); } Take the above as a simple way to express how you would have your final execute twice. It may not be immediately apparent why the callback executes twice, consider the scenario

Node.js Error Handling Patterns

The WRONG Way There is always a exceptionally bad way of doing something in NodeJS (or any language) so I figured covering this will put perspective on the alternatives. Listening for uncaughtException Listening for events on the global process variable is easy, and this is likely why we see this

Process Functions Asynchronously with a Final Callback

Purpose and use case Generally your functions are executed asynchronously with some exceptions, and the challenge for some is when you have a piece of code that can not be executed until previous functions are complete or data is returned. > So then why exactly would you want to process