Posts about go

Concurrent Map Writing and Reading in Go, or how to deal with the data races.
16 Jul 2021

Concurrent Map Writing and Reading in Go, or how to deal with the data races.

This time, I will show you how to work with the maps in go effectively and prevent the occurrence of the data race errors. Data races happen when several goroutines access the same resource concurrently and at least one of the accesses is a write.

go concurrent map data race
Ristretto - the Most Performant Concurrent Cache Library for Go
2 Mar 2021

Ristretto - the Most Performant Concurrent Cache Library for Go

Recently, I discovered a surprisingly reliable memory caching solution, which I’m planning to use in all my further applications to increase performance. In this blog post, I will share some code examples of how you can integrate Ristretto caching library into your application.

go caching ristretto performance
How to Show Flash Messages in Go web applications (with Echo framework)
4 Feb 2021

How to Show Flash Messages in Go web applications (with Echo framework)

When we create a web application, usually, there a need to communicate with the users to inform them about the results of their actions. The easiest way to communicate - is to send messages. These messages might be warnings, errors, or just informational text. In this article, we will improve the UX of our user authentication application from the previous article by adding an error flash message when the user entered a wrong password and a success message after user authorisation.

go echo flash messages
User Authentication in Go Echo with JWT
28 Jan 2021

User Authentication in Go Echo with JWT

In this article, we will build a simple user authentication functionality using JWT (JSON Web Token). In the examples, I’m going to use a Go Echo framework. This will allow us to avoid writing some boilerplate code.

go authentication JWT Echo
A Simple Queue Implementation in Golang with channels
12 Jan 2021

A Simple Queue Implementation in Golang with channels

In this post, I’m going to show the way how we can implement a simple queue in Golang, using channels.

go queue channel goroutine
How to Sort Strings With Go Alphabetically in Any Language
4 Jan 2021

How to Sort Strings With Go Alphabetically in Any Language

In this article I’m going to show how easy we can sort strings alphabetically in different languages, using Go. It seems like an easy task if we want to sort English words, however, it’s not so trivial if we want to sort correctly strings with special characters or in other languages, i.e Cyrillic based.

go sorting alphabetical sort
How to Control Router Access Permissions in Go Web Apps
23 Dec 2020

How to Control Router Access Permissions in Go Web Apps

In this post I’m going to describe how can we limit user access to the specific url in golang web application. I will use chi router - a lightweight, idiomatic and composable router for building Go HTTP services.

go router chi
How to test database interactions in golang applications
22 Dec 2020

How to test database interactions in golang applications

Testing of functions with database interactions always was challenging. Recently, I found a wonderful library go-sqlmock which will simplify writing tests and mocking database queries in golang applications a lot.

go testing sql
Go middleware example. How to alter a handler result
20 Dec 2020

Go middleware example. How to alter a handler result

Let’s imagine a situation when you want to alter the result, returned by some http handler to the client. Fortunately, Golang provides an easy mechanism for that, called a middleware. I’m going to dive directly to the source code, to save your time.

go middleware