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
What is a heredoc? A heredoc is a way to define a multiline string, while maintaining the original indentation & formatting. This is used to embed snippets of code, like SQL or HTML. Here’s an example: query =
Did you know that you can copy an object in Ruby? Not only that, but there are two different methods to do this! These methods are: dup clone We will explore the differences in a moment, but first… Why would you want to clone an object? Many objects in Ruby are mutable, you can change … Read more