A matrix is a 2D (2-dimensional) array that can be used to store & work with spreadsheet-like data. They can be used for: Representing a board in a table game (chess, checkers, etc.) Statistics & data analysis Generating plots & graphs Because this is a powerful data structure it’s helpful to learn how to use … Read more
In this article you’ll learn how the Ruby inspect method works & why do we use it. When you print a string or array you see its contents. Example: puts [1,2,3] 1 2 3 But when you print your own objects… You see this: #<Cat:0x29458e0> Why? Because you haven’t told Ruby how to display this … Read more
Many people forget that Ruby can do things that aren’t web applications. In this article, I want to show you how to build a command-line application to help remedy that! Here are some command-line applications you may be familiar with: There are many ways to build a command-line application & in this article we are … Read more
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