You've successfully subscribed to The Poor Coder | Hackerrank Solutions
Great! Next, complete checkout for full access to The Poor Coder | Hackerrank Solutions
Welcome back! You've successfully signed in.
Success! Your account is fully activated, you now have access to all content.
Enable dark mode
Ruby - Enumerable - group_by
Hackerrank Ruby - Enumerable - group_by Solution
Another function often used with data collections is one which groups the elements according to some evaluation result. Consider the following example. Let's say you have a list of 100 integers and you want to group them according to their even and odd value. In Ruby, you can easily do