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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 solution is to use a powerful combination of gems like Webmock + VCR. WebMock intercepts HTTP

A new version of Ruby is coming with new features & performance improvements. Would you like to keep up with the changes? Let’s have a look! Endless Ranges Ruby 2.5 & older versions already support one form of endless range (with Float::INFINITY), but Ruby 2.6 takes this to the next level. The new endless range looks like this: (1..) This is different from a regular range because it doesn’t have a

This article is about method delegation in Ruby. You’re going to learn how to use the delegate method, the Forwardable module & the SimpleDelegator class. Why do we need delegation? In Object-Oriented Programming, there are two ways for classes to work together. They are: Inheritance Composition With inheritance, you create class hierarchies, where a parent class shares methods, constants & instan

New Ruby versions keep improving & Ruby 2.5 is no different. Ruby 2.5 introduces these optimizations: String interpolation will be around 72% faster when a large string is created String#prepend will be around 42% faster if only one argument is given Enumerable#sort_by, Enumerable#min_by & Enumerable#max_by will be about 50% faster Let's see some benchmarks! String Interpolation Performance I took

Did you know that using the right Ruby method can save you a lot of work? The more methods you are familiar with the faster you can produce working code & the better this code will be, both in performance & quality. That’s why today I want to introduce 7 interesting methods to you that you may not have seen before. Integer#digits Method (Ruby 2.4) This is a new method introduced in Ruby 2.4 & it’s