Curiosum TILs

In the world of Elixir programming, there are numerous features and syntactic constructs that contribute to the language's elegance and expressiveness. One such hidden gem is the concept of "implicit try".

Today's Advent of Code puzzle inspired me to create this TIL. It may sound trivial, but in fact, it's tricky if you are unfamiliar with the nuances of guards' functioning.

Warnings in Elixir are usually an important sign of a problem in the codebase. There is an easy way to make them gone.

Pattern-matching is one of the finest elixir-lang features. Whoever knows the power of this tool once, will want to use it forever.

Did you ever create a commit that you wish never happened? Let's be honest - we all did. There is an easy way to revert it in Git.

TLDR: With jest-extended package you can write: expect([...set]).toIncludeSameMembers([value1, value2]);. If you are looking to a native, but longer solution scroll down a bit.

If you ever had to count occurrences of values in Elixir's list, this short post might be helpful for you!

There are a bunch of operations you may want to perform before the rendered response in conn is sent to the client, such as minification. In this post I'll show you how to do it easily.

In this post, you'll learn how to easily redirect users to the previous path using the Navigation History plug.

The macro mechanism in Elixir is not only an interesting metaprogramming feature - in fact, it is at the language's very core. And the more awesome fact is that, using macros, you can override the algorithm of defining functions itself!

So you don’t know what’s the type of struct you’re passing somewhere? Maybe it can be one of few types and you have to distinguish them? Or any other reason… But it’s about checking the struct type. Just use one of the coolest Elixir features - pattern matching!

Sooner or later you'll have to change the null constraint in one of your DB relations. How to do it easily in Ecto?