[V3] Implement new Concept Exercise: conditionals-ternary

[biancapower]

This issue describes how to implement the conditionals-ternary concept exercise for the Ruby track.

Getting started

Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read up on the following documents:

• The features of v3.
• Rationale for v3.
• What are concept exercise and how they are structured?

Please also watch the following video:

• The Anatomy of a Concept Exercise.

Goal

The goal of this exercise is to teach the student how and when to use ternary expressions and the ?: operator in Ruby.

Learning objectives

• Know how to use ternary expressions - using the ?: operator.

Out of scope

N/A

Concepts

• conditionals-ternary

Prerequisites

• booleans
• conditionals-if

Other prerequisites will depend on the story.

Resources to refer to

Hints

• Ruby Docs on Ternary If
• What is the ternary operator in Ruby?

After

• Ruby ❤ Shorthand: Ternary Operators
• How to Use The Ruby Ternary Operator (?:) (including Complex Ternary Operators)

Representer

This exercise does not require any specific representation logic to be added to the representer.

Analyzer

This exercise does not require any specific analyzer logic to be added to the analyzer.

Implementing

To implement this exercise, please follow these instructions.

Help

If you have any questions while implementing the exercise, please post the questions as comments in this issue.

[dvik1950]

I think it's a bit of an overkill to create a whole exercise just for the ternary operator. It makes more sense to add this to another exercise. I can't think of an exercise that would cover this. Would the student be required to write a few methods just using the ternary operator? How would those methods differ from each other?