Programming

I want to add tags to products. And as usual there are a situation where a product can have many tags and a tag can belong to many products. However, in my opnion, the best option is to use a 'has_many :through' relationship. So for this, I need a table called tags and a join table called taggings. In this tutorial, I will go through how would do this.

Something I do in EVERY project is to setup some sort of relation between resources. And even though Phoenix comes with generators for migrations and CRUD opeartions, you still need to modify the code to suite for the relations you want. In this short tutorial, I will go through my usual steps regarding setting up a basic has_many / belongs_to - relation.

One thing I found confusing about Postgrex , the excellent PostgreSQL adapter for Elixir , was how to use PostgresSQL-specific data types (...

Components are a mechanism to compartmentalize state, markup, and events in LiveView. We can move a part of the LiveView's logic (and related template) into separate components. We start by moving the product card, the part inside the for comprehension, into a LiveComponent.

We see how to create thumbnails of Images and PDFs in Elixir and Phoenix, using ImageMagick and Mogrify.

Learn how to make use of functional components to create complex Phoenix LiveView UIs.

A step-by-step tutorial we see in depth how to build a Phoenix app from scratch, letting users upload their files using a multipart form. We learn how to easily run PostgreSQL with Docker, to receive uploads using Plug, and how to use Ecto to store upload details into the database.

Validate and define text-based and dynamic configuration

There are big changes in store for the Web IDE in the coming milestones.

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Convert hex strings to PGP word lists and vice-versa in elixir https://en.wikipedia.org/wiki/PGP_word_list Re-implementation of

Demystify encryption by taking a medium dive and building your very own encryption engine in Elixir. In this post, we'll build a light-weight Elixir library that leverages Erlang's :crypto to encrypt/decrypt sensitive data, and learn a little more about encryption along the way. Overview Our library will be able

Believe it or not, I spent 3 years of my career without knowing what testability really means, in fact, I never really heard that term until lately. I have been working on small-scale applications, writing tests for every feature I had implemented, b...

RStudio 1.4 was released in January 2021 and switched to calendar-based versioning as of 2021.09. Starting with 1.4, the IDE includes a visual markdown editor that works on any markdown-based document, such as .md or .Rmd files. Visual editing mode pro...

Website for Elixir

Over the decades, Humans have proved to be pretty bad at producing bug-free software. Trying to apply our approximative, fuzzy thoughts to perfectly logical computers seems doomed. While the practice of code reviews is increasing, especially with the culture of Open Source becoming dominant, the situation is still far from

When building a web application there is almost always some form of a database being utilized to persist the application's data.

Unless you already didn't know, when a LieView component is mounted on a page, it runs the mount/2 function twice. One when the page is rendered from the initial request, and one one when the socket is connected. So if you have data that is slow or resource heavy to load, you should consider to wait until the socket is connected so the intial load is not in vein. A popular approach is to use ghost cards. A ghost gard is a loading placeholder that looks similar to the content that you try to load in but without actual data. In this tutorial I will show you how

A collection of small Elixir programming language examples.

Last week I got a pleasant refresher on updating maps. As I type this it sounds like such a basic thi...

Joy of Elixir is a gentle introduction to programming, aimed at people who already know some things about computers, but who have little-to-no programming experience.

Master Anonymous Functions in Elixir by solving 3 exercises, with support from our world-class team.

I have a bit of an odd question, but I have read all sorts of Elixir documentation and textbooks in sort of an answer to this and have come up with nothing. I have a set of .txt files which each c...

Know the working of strings