Gabor Koos

@gkoos

Practical Go, JS, and TS tutorials.

London, UKJoined August 2025

About

Software engineer, open-source contributor, and tech writer. I write about Golang, TS/JS, algorithms, coding best practices, and real-world engineering solutions.

Available for

Nothing here yet.

Gabor Koos's blogs

the Pocket Gopherpocketgopher.hashnode.dev13 posts

freeCodeCamp Englishfreecodecamp.org/news8 posts

Articles Comments

Recently published

GKGabor Koosfreecodecamp.orgApr 6 · 17 min read

How to Go from Toy API Calls to Production-Ready Networking in JavaScript

Imagine this scenario: you ship a feature in the morning. By afternoon, users are rage-clicking a button and your UI starts showing nonsense: out-of-order results, missing updates, and random failures

0

GKGabor Koospocketgopher.hashnode.devMar 11 · 1 min read

How to Find the Top-K Items: Heap and Streaming Approaches in Go

My latest freeCodeCamp article walks through practical ways to solve Top-K problems efficiently in Go, including heap-based and streaming-friendly approaches, with a focus on performance and real-worl

0

GKGabor Koosfreecodecamp.orgMar 10 · 13 min read

How to Find the Top-K Items: Heap and Streaming Approaches in Go

Finding the top K items in a dataset pops up everywhere: from highlighting the hottest posts in a social feed, to detecting the largest transactions in a financial system, or spotting the heaviest use

0

GKGabor Koospocketgopher.hashnode.devJan 14 · 1 min read

Unit Testing in Go - A Beginner's Guide

My latest FreeCodeCamp article covers unit testing in Go, why it matters, and practical examples for writing cleaner, more testable code. Check it out here: https://www.freecodecamp.org/news/unit-testing-in-go-a-beginners-guide/

0

GKGabor Koosfreecodecamp.orgJan 12 · 15 min read

Unit Testing in Go - A Beginner's Guide

If you're learning Go and you’re already familiar with the idea of unit testing, the main challenge is usually not why to test, but how to test in Go. Go takes a deliberately minimal approach to testing. There are no built-in assertions, no annotatio...

0

Gabor Koos

About

Available for

Gabor Koos's blogs

Recently published

How to Go from Toy API Calls to Production-Ready Networking in JavaScript

How to Find the Top-K Items: Heap and Streaming Approaches in Go

How to Find the Top-K Items: Heap and Streaming Approaches in Go

Unit Testing in Go - A Beginner's Guide

Unit Testing in Go - A Beginner's Guide

Search Hashnode

Gabor Koos

About

Available for

Gabor Koos's blogs

Recently published

How to Go from Toy API Calls to Production-Ready Networking in JavaScript

How to Find the Top-K Items: Heap and Streaming Approaches in Go

How to Find the Top-K Items: Heap and Streaming Approaches in Go

Unit Testing in Go - A Beginner's Guide

Unit Testing in Go - A Beginner's Guide