This article explains class & module autoloading in Ruby. Including the new “Zeitwerk” gem which is part of Rails 6. Let’s start with a question… How do we bring together multiple source code files into one? We require them. Requiring a file makes Ruby read it & run the code inside. But if we have … Read more
What’s this “Puma” thing that starts running when you do rails server? It’s an app server! Let me explain what an application server is & why do we need them with an example. Understanding App Servers Let’s say you start building your new shiny web application in Ruby. And before you write any code… You … Read more
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