Inherits Reference / Object
The grouped_articles variable is a Hash where: Key: category (String) Value: Array of tuples { id, title, summary, created, category }
Appends a short String representation of this object which includes its class name and its object address.
class Person def initialize(@name : String, @age : Int32) end end Person.new("John", 32).to_s # => #<Person:0x10a199f20>