Backend>Blogs/Talks

Phantom Types in Gleam

CommunityNews

CommunityNews

Phantom Types in Gleam

In this post we’re going to be looking at a more advanced use of Gleam’s type system, known as phantom types. Hopefully by the end of this you’ll have another tool in your belt to help you better model data in your programs. And fear not, because many languages support phantom types (most common functional programming languages support them, but so do others like Rust, and TypeScript, and even PHP) so you can apply this knowledge elsewhere!

Before we get stuck into some examples, let’s tackle the obvious question…

https://blog.pd-andy.dev/phantom-types-in-gleam

This thread was posted by one of our members via one of our news source trackers.

View thread on forum
/gleam#types
0 1579 0

Where Next?

View thread on forum
gleam
types
Home Backend>Blogs/Talks
/gleam#types
0 1579 0
Last post

Popular Backend topics Top

Scorpil
Backend>Blogs/Talks

Things Elixir's Phoenix Framework Does Right
I dabbled in Phoenix for a while now, but never really got my hands dirty with it right up until now. Apart from the whole framework bein...
scorpil.com
/elixir/phoenix
17 1525 4
New
First poster: bot
Backend>Blogs/Talks

Taking PHP Seriously
Taking PHP Seriously - Slack Engineering. Slack uses PHP for most of its server-side application logic, which is an unusual choice these...
slack.engineering
/php
0 1178 1
New
AstonJ
Backend>Blogs/Talks

Industry vs Academia - Francesco Cesarini & Simon Thompson at Lambda Days 2021
Just listening to this now… Totally agree with @FrancescoC’s and @thompson_si’s comment “learn to learn” :sunglasses: In our talk we’...
youtube.com
/elixir/erlang#talk
7 1496 1
New
paulanthonywilson
Backend>Blogs/Talks

Blog on Content Security Policy configuration (in Phoenix with LiveView)
I had a bit of a mini-adventure following Sobelow’s advice on adding a CSP to a Phoenix App. If you want to follow along, or want to add ...
furlough.merecomplexities.com
/elixir/phoenix#blog-post/security
3 1860 0
New
First poster: dimitarvp
Backend>Blogs/Talks

I rewrote my Rust keyboard firmware in Zig: consistency, mastery, and fun
I’ve spent the last year building keyboards, which has included writing firmware for a variety custom circuit boards. I initially wrote ...
kevinlynagh.com
/rust/zig
3 2025 2
New
prajaut
Backend>Blogs/Talks

Golang Error Handling blog post
Being a part of the tech industry, it would be good to share thoughts on specific technologies. Having surrounded by skilled and experie...
bacancytechnology.com
/go
7 1898 2
New
First poster: bot
Backend>Blogs/Talks

Julia is the better language for extending Python
Just a small test with lists in cython. Considering echosystem, multithreading and ease of use, Julia is a clear winner here.
github.com
/julia/python
0 1445 0
New
wolf4earth
Backend>Blogs/Talks

ElixirMix 142 - Building PWAs in Elixir and Phoenix ft. Tej Pochiraju
Tej Pochiraju joins the mix to discuss Progressive Web Apps and how you can support them using Elixir and Phoenix to control IoT devices....
devchat.tv
/elixir/phoenix/flutter#podcasts#pwa
1 1616 0
New
brainlid
Backend>Blogs/Talks

Created my Personal AI Fitness Trainer in 2 Days
In a 2 day spike, I created my own Elixir-based AI Personal Fitness Trainer! The surprising part for me was how useful and helpful I foun...
fly.io
#ai/elixir#blog-post#fitness#chatgpt#workout
2 1120 0
New
penelopa
Backend>Blogs/Talks

How to Set Up a Free RTMP Server in 2025?
Learn how set up an RTMP server for free using the open-source Red5 software. This tutorial covers all steps from downloading the code fr...
red5.net
#opensource#red5#live-streaming
1 1213 0
New

Other popular topics Top

PragmaticBookshelf
Hybrid>Learning Resources

Programming Flutter
Instantly view the changes you make to an app with stateful hot reload, and define a declarative UI in the same language as the app logic...
pragprog.com
#pragprog/book-programming-flutter#published-book/flutter
11 4501 1
New
PragmaticBookshelf
Backend>Learning Resources

Programming Machine Learning
Machine learning can be intimidating, with its reliance on math and algorithms that most programmers don't encounter in their regular wor...
pragprog.com
#pragprog#ai/python#published-book/book-programming-machine-learning#math#algorithms
6 5350 3
New
PragmaticBookshelf
Backend>Learning Resources

Testing Elixir
Write Elixir tests that you can be proud of. Dive into Elixir’s test philosophy and gain mastery over the terminology and concepts that u...
pragprog.com
#pragprog/elixir#published-book/book-testing-elixir
33 5004 8
New
AstonJ
General Dev>Code Editors

Poll: Which code editor do you use?
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
#community#polls/vim/emacs#code-editors/vscode#notepad/sublime-text#atom/textmate#codespaces#brackets/onivim#geany
121 5796 61
New
dimitarvp
macOS>Chat

My thoughts on macOS vs Linux
Small essay with thoughts on macOS vs. Linux: I know @Exadra37 is just waiting around the corner to scream at me “I TOLD YOU SO!!!” but I...
#macos#linux
166 9730 69
New
Help
Game Dev>Questions

Can I use Java to program a game for Nintendo switch?
I am trying to crate a game for the Nintendo switch, I wanted to use Java as I am comfortable with that programming language. Can you use...
/java#nintendo
8 4771 3
New
AstonJ
macOS>Chat

How to block any website on Mac using Little Snitch
If you want a quick and easy way to block any website on your Mac using Little Snitch simply… File > New Rule: And select Deny, O...
#macos#how-to#littlesnitch
5 11227 3
New
PragmaticBookshelf
Backend>Learning Resources

Agile Web Development with Rails 8
Get the comprehensive, insider information you need for Rails 8 with the new edition of this award-winning classic. Sam Ruby @rubys ...
pragprog.com
#pragprog#web-development/ruby/rails#published-book/book-agile-web-development-with-rails-8
12 7404 7
New
AstonJ
AI>Chat

How to: Run DeepSeek on Mac, Windows, and Linux!
This is a very quick guide, you just need to: Download LM Studio: https://lmstudio.ai/ Click on search Type DeepSeek, then select the o...
#macs/deepseek#guides#lm-studio
14 9328 10
New
PragmaticBookshelf
Backend>Learning Resources

MySQL 9 Essentials
A concise guide to MySQL 9 database administration, covering fundamental concepts, techniques, and best practices. Neil Smyth MySQL...
pragprog.com
#pragprog#published-book/mysql/book-mysql-9-essentials
2 4162 0
New
Back to top

Sponsor Spotlight

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Latest in Gleam

Gleam Portal ❯

Backend>Blogs/Talks

Backend Blogs/Talks ❯

Latest on Devtalk

Devtalk ❯

We ❤️ helpful members!

We reward our most helpful members via our MOTM scheme - by giving away a whopping 25 books per year!

Member of the Month

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

Categories:

Sub Categories:

Popular Portals

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap