Golang - Pg. 2
The Ultimate Guide to JSON in Go
by Lane Wagner - Boot.dev co-founder and backend engineer
As a language designed for the web, Go provides extensive support for working with JSON data. JSON (JavaScript Object Notation) is an incredibly popular data exchange format whose syntax resembles simple JavaScript objects. It's one of the most common ways for applications to communicate on the modern web.
How Replace a String in Go - Top 5 Examples
by Lane Wagner - Boot.dev co-founder and backend engineer
Go has a powerful standard library that makes string manipulation easy right out of the box. One of the functions I use most often is the strings package's Replace() function. strings.Replace() returns a copy of its input string after replacing all instances of a given substring with a new one.
How and Why to Write Enums in Go
by Lane Wagner - Boot.dev co-founder and backend engineer
An enum (short for enumerator), is a set of named constant values. An enum is a powerful tool that allows developers to create complex sets of constants that have useful names and yet simple and unique values.
Splitting a String into a Slice in Golang
by Lane Wagner - Boot.dev co-founder and backend engineer
I can't begin to tell you how often I split strings in Go. More often than not I'm just parsing a comma-separated list from an environment variable, and Go's standard library gives us some great tools for that kind of manipulation.
For Loops in Go
by Lane Wagner - Boot.dev co-founder and backend engineer
For loops are a programmer's best friend! They allow us execute blocks of code repeatedly and iterate over collections of items. In Go, there are several different ways to write one.
Using a High-Level RabbitMQ Client in Golang
by Lane Wagner - Boot.dev co-founder and backend engineer
So you might already know that the amqp package is awesome and you can get up and running with just 40-50 lines of simple code. Unfortunately, the bare-bones amqp library doesn't handle a lot of the stuff you probably wish it did, things like reconnecting logic, the spawning of threads, queue and binding boilerplate, and flow control.
Why should you learn Golang? [2026]
by Meghan Reichenbach
Golang has skyrocketed in popularity year over year, making it one of the best choices for career-conscious developers to learn. As an example, StackOverflow's Developer survey saw it climb in popularity among developers from 10th in 2019 all the way to 5th in 2020. Additionally, a full 32% of developers surveyed in Insights Dice want to learn it. Go developers are paid well - globally, the StackOverflow survey found that Perl, Scala, and Go programmers have the highest salaries.
Should You Commit the Vendor Folder in Go?
by Lane Wagner - Boot.dev co-founder and backend engineer
If you're asking "should I commit the vendor folder in my Go project to Git?", the answer is "almost always". Let's talk about why committing is generally better than not.
Learn Go Fast - Top Courses and Resources
by Lane Wagner - Boot.dev co-founder and backend engineer
Want to learn Go fast? The good news is that Go is one of the simplest programming languages out there. It was designed to have a compact feature set, which means you can learn it much faster than most other languages.
The Nuances of Constants in Go; Go Isn't JavaScript
by Lane Wagner - Boot.dev co-founder and backend engineer
Constants can be confusing and easy to misuse in Go if you are coming from an untyped language. Let's take a look at some of the nuanced details of how they work in Go. It's probably unsurprising, but Go's constants are almost nothing like JavaScript's bastardized version of the concept.
How to Structure a Golang Project
by Lane Wagner - Boot.dev co-founder and backend engineer
I lead a team that's responsible for anywhere from 15-25 Go microservices at any given time. We're constantly creating new services and libraries, so it's become important to streamline the project creation process. I'm mostly writing this article for myself as a kind of self-documentation, but hopefully, you'll find it useful as you create new Go projects for yourself.
Running Go in the Browser with WASM and Web Workers
by Lane Wagner - Boot.dev co-founder and backend engineer
We've recently made big changes to how we execute Go in the browser on boot.dev and want to explain the enhancements. Web Workers are the reason we've been able to solve some of the serious browser-related coding problems that were holding us back. Consider this article a sequel to Running Go in the Browser with Web Assembly.
How to Make Pure Functions in Golang
by Lane Wagner - Boot.dev co-founder and backend engineer
Pure functions are often hyped up in the JavaScript world, probably because of the abundance of stateful front end applications. While pure functions have their downsides (i.e. inconvenience, potentially large argument lists), they should be used as much as reasonably possible.
Create a Golang Video Streaming Server Using HLS
by Lane Wagner - Boot.dev co-founder and backend engineer
In this tutorial, we'll go step-by-step through building a video streaming API (which will work for music as well) in Go. Don't worry, it's surprisingly easy to build a robust media streaming server, especially if we utilize a modern communication protocol, HLS.
Should You Return Empty or Nil Slices in Go?
by Lane Wagner - Boot.dev co-founder and backend engineer
In Go, we often need to return zero values. Idiomatic Go encourages the use of guard clauses, and guard clauses necessitate the need to return early. When returning early with an error, by convention all other return values should be zero values. The confusion arises with data types like maps and slices. Should maps and slices be returned as a simple nil value, or should an empty but instantiated value be returned?
Top 15 Golang Interview Questions [Updated 2026]
by Lane Wagner - Boot.dev co-founder and backend engineer
Let's take a look at some good technical questions to be familiar with, whether you are looking to nail your next Golang interview, or if you're the interviewer yourself..
Unexpected Printf Behavior in Go WASM - Nothing Prints
by Lane Wagner - Boot.dev co-founder and backend engineer
While working on boot.dev's Go Playground, I came across a very strange error. The standard library's fmt.Printf() function prints nothing to the console when called. Nothing.
Authenticate Users with "Sign In With Google" in Golang
by Lane Wagner - Boot.dev co-founder and backend engineer
Users love convenience. If your goal is to make it easy for users to register with your app or website, then implementing the "Sign in with Google" option should be at the top of your priority list. If you are like me, then you may find Google's documentation on the subject to be lackluster at best, and downright confusing at worst. Here we will go step-by-step through the authentication process so you can implement Google sign-in easily.
Rust Backend vs Go Backend in Web Development
by Lane Wagner - Boot.dev co-founder and backend engineer
Rust and Go are two of the industry's biggest successes when it comes to developing modern programming languages. Both languages compete in terms of backend web development, and it's a fierce competition. Golang and Rust are new languages, have growing communities, and are fast and efficient. When it comes to microservice architectures, frameworks, and apps, Rust and Go are household names on the backend.
Running Go in the Browser With Web Assembly (WASM)
by Lane Wagner - Boot.dev co-founder and backend engineer
If you are familiar with the Go Playground, then you know how convenient it is to be able to have a Go scratchpad in the browser. Want to show someone a code snippet? Want to quickly test some syntax? Browser-based code pads are helpful. On that note, I created a new playground. The cool thing about this new playground that it doesn't use a remote server to run code, just to compile it. The code runs in your browser using web assembly (WASM).
Make Maps and Slices in Golang - A Guide to Initialization
by Lane Wagner - Boot.dev co-founder and backend engineer
There are quite a few ways to create new maps and slices in Go, for example, they can both be initialized using the make() function, the new() function, as literals, or by using the var keyword. With so many choices, which option is best? Or perhaps better asked, which one is best in your situation? Let's take a look.
Go-CoNLLU - Some Much Needed Machine Learning Support in Go
by Lane Wagner - Boot.dev co-founder and backend engineer
Python is commonly seen as the AI/ML language, but is often a dull blade due to unsafe typing and being slow, like really slow. Many popular natural language processing toolkits only have Python APIs, and we want to see that change. At Nuvi, a social media marketing tool, we use Go for the majority of our data processing tasks because we can write simple and fast code. Today we are open-sourcing a tool that has helped make our ML lives easier in Go. Say hello to go-conllu.
Go's WaitGroup vs JavaScript's PromiseAll
by Lane Wagner - Boot.dev co-founder and backend engineer
In applications that are i/o heavy, it can get clunky to synchronously execute high-latency functions one after the other. For example, if I have a web page that needs to request seven files from the server before it can show the page, I need to asynchronously fetch all those files at the same time. The alternative of making each request one at a time will take much too long. This is where JavaScript's PromiseAll and Go's WaitGroup come in.
How to Sort a Slice in Go
by Lane Wagner - Boot.dev co-founder and backend engineer
Sorting is a common task in programming, and for that reason, most languages have a default sorting algorithm in their standard library. Go is one such language. Go has gone about providing sorting functionality in one of the most elegant ways possible, via an interface.
Don't Go To Casting Hell - Use Default Native Types in Go
by Lane Wagner - Boot.dev co-founder and backend engineer
Go is strongly typed, and with that, we get many options for simple variable types like integers and floats. The problem arises when we have a uint16, and the function we are trying to pass it into takes an int. We find code riddled with int(myUint16) that can become slow and annoying to read. In other words, when Go developers stray from the "default" type for any given type family, the code can get messy quickly.
