AppSignal Academy

AppSignal is all about building better apps. In our Academy series, we'll explore application stability and performance, and explain core programming concepts.

The Inherited Hook Method in Ruby - and More Parenting Lessons

By Mehdi Farsi on Sep 3

Today, we will explore the inherited hook method and dive into preventing inheritance

Cleaning Up Ruby Strings 13 Times Faster

By Maud de Vries on Aug 20

In this post we dive into when generic methods are worth replacing with specific alternatives. Illustrated by cleaning up strings.

The Ultimate Checklist to Properly Internationalize Devise

By Maud de Vries on Jun 11

The checklist I wish existed when I discovered the complexities of Internationalising Devise

Up the Ancestor Chain with method_missing

By Mehdi Farsi on May 7

In this post we'll follow a method and travel all the way up the ancestor chain

Object Marshalling in Ruby

By Mehdi Farsi on Mar 26

In this article, we’re going to dive into object marshalling, the Marshall module, and compare the `_dump` and `self._load` methods.

Diving into Ruby's #dup and #clone

By Jeroen van Baarsen on Feb 26

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

An instrumental intro to GraphQL with Ruby

By Peter Ohler on Jan 29

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

Don't be mean: Statistical means and percentiles 101

By Robert Beekman on Dec 4

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

Testing Asynchronous Threads in Ruby

By Peter Ohler on Nov 6

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

The innards of a RubyGem

By Robert Beekman on Oct 23

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

#to_s or #to_str?
Explicitly casting vs. implicitly coercing types in Ruby

By Tom de Bruijn on Sep 25

We'll look into difference between explicit casting and implicit coercing in Ruby, and the difference between typecasting Leonard Nimoy and Michael Keaton.

Differences Between #nil?, #empty?, #blank?, and #present?

By Joyce Echessa on Sep 11

In this article, we'll refresh your knowledge by looking at the differences between #nil?, #empty?, #blank? and #present? in Ruby and Rails.

Aug 28 2018 Push and Pub/Sub in Ruby
Aug 14 2018 Rails Collection Caching
Jul 31 2018 Generating Random Numbers in Ruby
Jul 17 2018 JavaScript-sprinkled Rails Applications
Jul 3 2018 Custom Exceptions in Ruby
Jun 19 2018 Caching counters with ActiveRecord's counter caches
Jun 5 2018 Ruby's redo, retry and next keywords
May 23 2018 Speeding up your app’s navigation with Turbolinks
May 16 2018 Ensuring execution, retrying failures and reraising exceptions in Ruby
May 1 2018 Client-side caching in Rails: conditional GET requests
Apr 24 2018 ActiveRecord performance: the N+1 queries antipattern
Apr 17 2018 Rails' built-in cache stores: an overview
Apr 10 2018 Rescuing exceptions in Ruby
Apr 3 2018 Russian doll caching in Rails
Mar 28 2018 Understanding system load and load averages
Mar 20 2018 Fragment caching in Rails
Mar 13 2018 Exceptions in Ruby
Mar 6 2018 Understanding CPU statistics
Feb 27 2018 Benchmarking Ruby code
Feb 21 2018 Inspecting data in Ruby
Feb 13 2018 Debugging exceptions in Rails
Feb 6 2018 Reading and understanding Ruby stack traces

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