Map is a Ruby method that you can use with Arrays, Hashes & Ranges. The main use for map is to TRANSFORM data. For example: Given an array of strings, you could go over every string & make every character UPPERCASE. Or if you have a list of User objects… You could convert them into … Read more
What is a private method in Ruby? It’s a type of method that you can ONLY call from inside the class where it’s defined. This allows you to control access to your methods. A Ruby method can be: private public (default) protected By default ALL your methods are public. Anyone can use them! But you … Read more
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 … Read more
What is a Ruby gem? A gem is a package that you can download & install. When you require an installed gem you’re adding extra functionality to your Ruby program. Gems allow you to: Add a login feature to your Rails app Easily work with external services (like APIs) Build a web application That’s just … Read more
You’re working with an integer but you would like to use string methods (like gsub) instead. What can you do? Convert it into a string (with to_s) then convert it back to an integer (with to_i). For example: You can convert the Integer 1 to the String “1”. Then you can use methods from the … Read more