Articles about Ruby, the language
If you’re on the path to learning Ruby then you might have heard of this thing called an ‘Enumerator’. As scary as it sounds, Enumerators are actually your friends and will be helping you a lot on your journey to becoming a Ruby *aficionado*. Since they are so important, let’s quickly get you up and …
You are probably familiar with the ‘if else’ control flow but there are certain situations where there may be a visually better way to write these statements. Here we will discuss how you can achieve this via the ‘unless’ keyword in Ruby and the different ways you can use it. Unless you already know… When …
In Ruby, the classic ‘switch statement’ is possible with the *case/when* keywords. Whenever if statements become too long and start looking messy you might want to consider using the case statement to write cleaner code. So how do you switch to case/when ? Case statements in Ruby are very powerful. To quote the popular ProgrammingRuby book, “The …
A tiny hack about how to declare and use private method in Ruby. How to declare a private method All methods above the keyword “private” is considered as public, all methods below are considered as private. Note that “private” here is not a keyword, but a method of the Kernel module. What is a private …
Posted March 30, 2021 – tagged ruby More often than not, you have to check if an object is empty or not, to avoid the famous *NullPointerException* – which is a *NoMethodError* in Ruby. “if” alone may not be enough if false or if nil won’t execute the corresponding condition, because false and nil are considered as falsy values. In other words, if …
Check emptiness in Ruby : nil? vs blank? vs empty? vs presence? Read More »
tagged ruby There’s always a tiny doubt about how to “map with index” when using Ruby. Let’s see how, and we’re also going back to basics of Ruby map in this article. Intro Just like many other programming languages, the Map method is also in ruby. You use a ruby map or map, in general, to …