Ever wanted to know which method caused an exception - even if the exception was swallowed before you could get your hands on it? You can do all this and more with the magic of TracePoint.
It's super handy to be able to refer to processes by name. But default process names can be pretty cryptic. This post will show you how to set friendly process names, and even how to use the process name to provide status summaries for long running processes like Unicorn.
The &: trick is a great shortcut when using enumerable methods like map. The way it works may surprise you. In this post we'll look in detail at exactly how code like users.map(&:name) functions under the hood.
I needed a script that will fetch our most recent blog posts and output a "digest" HTML email that I can personalize. In this post we walk through the process of creating it. You'll learn about fetching and parsing RSS as well as templating with ERB. Yes! You can use ERB outside of Rails!
An OpenStruct is around 10x slower to initialize than a Struct. That was the surprising result of this benchmark where we pitted structs vs classes vs hashes vs OpenStruct. Hashes didn't do much better.
Is your Rails app is taking up a lot of RAM? Perhaps your application’s memory footprint is being enlarged by one or more bloated gems. The Derailed gem provides some awesome tools for detecting gem bloat.
Did you know you can use lambdas as a kind of dynamic hash replacement? The truth is, lambdas are pretty cool once you start to investigate them. In this post we'll cover basic usage and then show you some cool lambda tricks.
In a previous post we showed you how the environment variable system works, and busted some common myths. But as one helpful reader pointed out, we didn't say much about security. Since it's become common to use env vars for storing secret API keys and other valuable information, It's important to understand the security implications. Let's take a look.