Logging is the process of saving information about what your Ruby application is doing. It’s very helpful, both in development & production environments. Why? Because the whole point of logging is to collect information about what happened, what went wrong & what went right. All kinds of information can be logged: Slow SQL queries (so … Read more
With the uniq method you can remove ALL the duplicate elements from an array. Let’s see how it works! If you have an array like this one: n = [1,1,1,2,3,4,5] Where the number 1 is duplicated. Calling uniq on this array removes the extra ones & returns a NEW array with unique numbers. Example: n.uniq … Read more
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