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Our team handles over 30 billion requests each month. We run a stack with Ruby, MongoDB, Rust, Go, React and are improving this all the time.

Iteration, recursion, and tail-call optimization in Elixir

By Jeff Kreeftmeijer on

It’s time for another Elixir Alchemy! This week, we’ll dive into recursion in Elixir to find the fastest looping method. (Spoiler: it depends). 🎢

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Diving into Ruby's #dup and #clone

By Jeroen van Baarsen on

How #dup and #clone differ and how they work under the hood, triggered by a practical example.

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Unraveling Classes, Instances and Metaclasses in Ruby

By Jeff Kreeftmeijer on

Through examining metaclasses, we'll learn how class and instance methods work in Ruby.

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An instrumental intro to GraphQL with Ruby

By Peter Ohler on

We'll learn about GraphQL by making an application about music

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Serving Plug: Building an Elixir HTTP server from scratch

By Jeff Kreeftmeijer on

It’s time for another Elixir Alchemy! We'll learn by building today. We're building an HTTP server with a Plug adapter, which parses requests and builds responses so it can run Plug apps.

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Bindings and Lexical Scope in Ruby

By Jeff Kreeftmeijer on

In this edition of Ruby Magic, we’ll show how scope works in Ruby’s methods and closures. We’ll also take a peek at how ERB uses the binding object to render templates.

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Don't be mean: Statistical means and percentiles 101

By Robert Beekman on

A post about the statistics we use at AppSignal and how they work.

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Fibers and Enumerators in Ruby: Turning Blocks Inside Out

By Julik Tarkhanov on

In this edition of Ruby Magic, we shine a light on Enumerable and Fiber to explain flow controlling enumerables and turning blocks inside out.

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Understanding Elixir’s GenStages: Querying the Blockchain

By Miguel Palhas on

A dive into Elixir's GenStage module and backpressure using an example querying the blockchain

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Testing Asynchronous Threads in Ruby

By Peter Ohler on

Using a mental model with a Batman metaphor we explain testing asynchonous threads in Ruby

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Building a Ruby C Extension From Scratch

By Thijs Cadier on

In this edition of Ruby Magic, we'll show you how to use code written in C from Ruby.

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The innards of a RubyGem

By Robert Beekman on

Share code with yourself or others by utilizing the RubyGems ecosystem.

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