If you work with any kind of images in your Ruby application, there is a good chance that you’ll want to change them in one way or another. Like resizing them to save space & faster download for your users. But how can you do this? MiniMagick is a gem that can help you. It’s … Read more
If your Ruby application uses any kind of external API then you probably have faced the problem of slow tests & API rate limits. What is the solution? You could manually stub the HTTP methods from your client library, and return some pre-determined responses. But that’s a lot of work & ugly code! A better … Read more
REPL stands for Read-Eval-Print-Loop. It’s a program that allows you to type Ruby code & see the result directly. One popular REPL is irb. Another is pry. They’re useful because you can quickly test how some Ruby code works. For example: If you’re trying to convert an array of strings into an array of integers. … Read more
Today you’ll learn about state machines, how they work & how to use them in your Ruby projects with the AASM gem. Now: Imagine a traffic light… It can be red, green or yellow. When it changes colors, the next color is based on the current one. Let’s say that this is the kind that … Read more
If you want to run an external command from Ruby… …like wkhtmltopdf to convert an HTML file into a PDF. There are a few Ruby methods you can use. Depending on the method you use you’ll get different results. Let’s explore these methods together! The Ruby System Method The Ruby system method is the simplest … Read more