Will Chat GPT replace developers?
Spoiler: no.

Interesting article about “almost real life application”
I asked Chat GPT to build a To-Do app - Have we finally met our replacement?

Be aware - results can shock you.

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#gptchat

If you’re familiar with event loop and concept of microtasks and macrotasks it’ll be easy for you to answer all questions in

10 JavaScript Promise Challenges Before You Start an Interview

PS. Try from the last one.

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#javascript #promise

Knowledge about Communication Protocols, Web Servers, Database Engineering, Messaging Systems, Security are essential in modern backend development.

Few thoughts about
How to Become a Good Backend Engineer

Wish all the readers to have great careers.

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#backend

I want to close this year’s posts with the old but awesome video with Kavya Joshi’s talk about
Applied Performance Theory

This will be super useful for the performance testing specialists and those who are trying to investigate the possibilities of the systems with load testing.

You’ll know more about Opened and Closed Systems and the rules that describe real-life applications.

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#performance

Fresh look at ChatGPT possibilities in article:

20 Entertaining Uses of ChatGPT You Never Knew Were Possible

As for me, a great idea is Guest speaker Q&A prompts but the opposite way - preparing for Q&A sessions with AI generated questions can be a great tool for public speakers.
Also as I mentioned in previous posts it can be a great instrument for tests generation.

Highly recommend you to read the article and subscribe to my Tech Read channel where you’ll find a lot of interesting materials every week.
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#gptchat

Alternatives and competition are always good.
In this article you’ll find few not well known alternatives of React - Solid, Qwik, Marko, and Hotwire

Now That React is Dying — Here Are Some (Better) Alternatives

PS. Btw For the first look Qwik looks cool. Probably I will try it in my next projects.

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#react #solid #qwik #marko #hotwire

I think all of us at least once see this error:
{ a: 'Hello World!', b: { c: [Circular *1] } }

There are different types of Circular Dependencies:
- circular file imports
- circular module imports
- circular constructors

Recommend to check simple but useful article about Circular Dependency, instruments and principles for avoiding it -
Circular Dependencies in NestJS and how to Avoid Them

Follow the Trilon.io blog.
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#nestjs #dependencies

It’s impossible to build a great system quickly.
That’s why stories about service’s evolution are very important to be familiar with.

Old but interesting story about Uber’s experience with architecture of one part of the system - Designing Edge Gateway, Uber’s API Lifecycle Management Platform

Specifically about the goals of each stage of evolution - Decoupling, Protocol transformations, Streaming payloads and some non-technical challenges.

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#systemdesign #architecture

Written 5 years ago but still an impressive story about performance optimization and client refactoring by the Slack team.

Reducing Slack’s memory footprint

Even more important that this article includes the notification’s workflow diagram of one of the most widely used messaging application.

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#notifications #performance #optimization

Indexes are the essential part of most of the databases. These data structures are used to optimize the performance of database queries. But duplicate, redundant, and unused indexes can dramatically reduce performance.

In the article Duplicate, Redundant, and Invisible Indexes by Percona you’ll find small tips about finding such indexes in MySQL and I hope reduce the time of some queries.

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#databases #mysql #indexes

It’s great to know what your technologies and tools can do. But sometimes it is even more important to know what they cannot.

For the last few weeks I worked a lot with the dates, frequency and cron jobs. If you have tasks in same area next article could be very useful:

What Cron Can't Do and How To Do It Anyway

In it you’ll find ways to solve intervals and specific dates (for example holidays).
I’ve solved such issues with additional variables - interval names (“day”, “week”, “month”) and values.

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#cron

In software development it is very important to keep the errors consistent.
You can check github repository that describes the way of handling Node.js apps errors:

Handle errors in a simple, stable, consistent way

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#nodejs #errors

During application development you usually need to run some tasks at specific times or with some intervals. This means that sooner or later you’ll face the need to choose the scheduler.

Main criterias here are: Support for Persistence, Prevention of Duplicate Job Execution and Scaling.

In the blog post What is a Job Scheduler you’ll find the most common Node.js modules for this - Agenda, Bull, Bree, Node-Cron.

Among them I recommend Bull (anyway you probably use Redis in your app and don’t want to install additional db) or using separate (micro)service.

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#nodejs #scheduler

Videos and animations become a more and more important part of web development. So the skill of rendering and automatic generation of this kind of content is essential for Node.js developers.

Good tutorial to start with is Video Rendering with Node.js and FFmpeg.

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#nodejs #ffmpeg #video

The JavaScript Promise Integration (JSPI) - Google V8 API that bridges WebAssembly and asynchronous web. The WebAssembly JSPI API suspends a Wasm application when it issues a synchronous API call and resumes it when the asynchronous I/O operation is completed.

Some time ago I’ve written an article Node.js: In Go We Trust where described generation of WASM file built with Golang.

But nothing stays the same and in article
Introducing the WebAssembly JavaScript Promise Integration API you’ll find the description of the new API and examples with Emscripten and C/C++.

So follow me on Medium and subscribe to Tech Read channel.
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#webassembly #wasm

Changes in 9th version of npm (released some time ago but anyway) you’ll be able to find in article Exploring New Features in npm 9.

As for me the most interesting is install-strategy - hoisted, nested and shallow.

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#npm

Blue-green deployment is a release management technique that reduces risk and minimizes downtime. It uses two production environments, known as Blue and Green to provide reliable testing, continuous no-outage upgrades, and instant rollbacks.

If you for some reason don’t use Kubernetes you still are able to release this deployment strategy for the Node.js application with Nginx and pm2.

How? You’ll find instruction in article Blue Green Deployment for Node.js Without Kubernetes

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#nodejs #nginx #pm2 #deployment

If you are a JavaScript developer - check your code again.
Are you sure that you handled all the “unhandled rejections”?

If not - check the post of Jake Archibald The gotcha of unhandled promise rejections

Spoiler: sometimes you need to write something like “preventUnhandledRejections” specifically if you use old versions of Node.js (please update) for example (<12.9.0).

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#javascript #nodejs #promises

In article Middleware for web applications: it’s not just for enterprises you’ll find the reasons and ways to implement with middlewares such common functionalities as authentication/authorization (hope you know the difference) using 3 different languages - Golang, JavaScript and Python.

Additionally you’ll find a lot of useful links in the “Learn More” section.

Also a lot of useful links you can find in Tech Read channel so subscribe and enjoy.
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#middleware #javascript #golang #python

Let’s talk a little bit about Npm audit. It’s a great tool to protect you code in several ways:
- Generate and review security audit reports
- Verify the registry signatures of downloaded packages
- Checking and fixing of vulnerabilities

More - in NPM Audit: 5 Ways to Use it to Protect Your Code article and don’t forget to subscribe to Tech Read channel.
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#npm