Digests » 62

this week's favorite

Gathering metrics in Elixir applications

Metrics are a fundamental part of most pieces of software. They’re a great insight on how a system behaves and performs, and can be used for different purposes, such as performance monitoring or alerting in case of anomalies.

Concurrent Elixir: Processes

Processes are the bread and butter of Elixir’s concurrency. Unlike operating system threads, Elixir has green threads which are efficient and light on resources. These processes communicate and synchronize with each other by message passing.

Elixir for Rubyists

When I started my first project in Elixir I was still thinking in Ruby. At first, this was not much of a setback: both Ruby and Elixir share similar syntax and are high-level, readable, fun programming languages. The fast-growing, supportive community is reminiscent of Ruby during the early days of Rails.

Using Ecto changeset form for HTML input validations

All web applications with user submitted input have some constraints on what input is acceptable. We as developers have two methods to make sure what the user entered falls within those constraints.

The minimum knowledge you need to start metaprogramming in Elixir

Metaprogramming is writing code that writes code. In Elixir, we use macros to transform our internal program structure (AST) in compile time to something else. For example, the if macro is transformed to case during compilation, we call this macro expansion.