What is infinity in Ruby? It’s something that has a starting point but no ending. In Ruby, we can express this concept of infinity with the Float::INFINITY constant. You may be wondering how this is useful. Let me explain with examples! Infinity As A Result Of Arithmetic Operations Ruby returns an Infinity object, as the … Read more
In Rails, you can query the database through your models to access your data. You can do this using ActiveRecord methods. Like where, find, or find_by. As a result you get: With find_by, a single record or nil With where, an ActiveRecord::Relation object With find, a single record, found by its primary column (usually id), … Read more
Combining multiple strings together is something that you have to do often in Ruby. But how can you do that? Well… There are two ways: Ruby string concatenation Ruby string interpolation Concatenation looks like this: a = “Nice to meet you” b = “, ” c = “do you like blueberries?” a + b + … Read more
Let’s talk about Ruby’s gsub method & how to use it. First, you’ll need a string to play with this method. Why? Because the whole point of gsub is to replace parts of a string. In fact: The “sub” in “gsub” stands for “substitute”, and the “g” stands for “global”. Here is an example string: … Read more
If you want to learn about Ruby instance variables, how they work & why they’re useful. You’re in the right place! First question… What’s an instance variable? In the Ruby programming language, an instance variable is a type of variable which starts with an @ symbol. Example: @fruit An instance variable is used as part … Read more