Using splat and optional arguments in Ruby methods

This section explains how to use the splat and optional argument types with Ruby methods to give flexible interfaces to programs. So far, we've covered traditional, named, and default arguments. However, Ruby isn't done yet. When it comes to passing data to methods, Ruby gives a few more key tools that we can use:

• Traditional splat arguments
• Keyword-based splat arguments
• Optional arguments

Traditional splat arguments

One of my favorite features in Ruby is how explicit many of its methods are, and splat may be one of my preferred arguments. The splat argument allows developers to pass an array of values into a method. Imagine that we are building a program that...