Implement New Concept Exercise: Stringers

[andrerfcsantos]

Getting Started

If you have not yet contributed to concept exercises before, this task requires some upfront reading to acquire the necessary background knowledge.

Here you can read about what Concept Exercises are and how they are structured:

• What are Concept Exercises?
• Concept Exercises
• Concepts

Also, be aware of these general guidelines:

• Exercism Markdown Specification
• Exercism Formatting and Style Guide

Goal

The goal here is to create a new concept exercise that teaches about structs that implement the fmt.Stringer interface.
That includes writing a concept and creating a new exercise.

Concepts

The following concept needs to be created:

• stringers

You can use the introduction.md file of the concept also as introduction.md file of the exercise. No need to create different content at this point. Additionally, if you want to save some time it is ok to not have an extensive about.md at this point. It can also be mainly the instructions.md content, maybe with some additions you would like to make.

Learning Objectives

The student should learn about the following topics and then practice them in the concept exercise:

• present the fmt.Stringer interface
• implement a struct that satisfies the fmt.Stringer
• the use of a type that satisfies fmt.Stringer with fmt.Sprintf and other methods of fmt

Prerequisites

• strings
• string-formatting
• interfaces
• methods
• structs

These prerequisites should be listed in the config.json entry for the exercise.
The prerequisites above are a baseline of the prerequisites that might be needed for the exercise.
When implementing the exercise, feel free to add more prerequisites if the exercise needs them.

Story

Try to think of a story for the exercise that ties all the tasks together.
The story doesn't need to be highly complex.
Even a small story goes a long way to improve the enjoyment of the exercise.

Resources

Some links that might be helpful as a starting point and/or for the links section of the concept:

• Tour of Go: Stringers

How to proceed

1. First accept this issue by saying "I'd like to work on this" (no need to wait for a response, just go ahead).
2. Use this issue to discuss any questions you have, what should be included in the content and whatnot, and to collect more reference material.
3. Create a PR and set "exercism/go" as reviewers. Additionally, you can write in #maintaining-go on Slack that your PR is ready for review. Once you incorporated any critical feedback that the reviewer might give you and the PR is approved, it will be merged by a maintainer.

[norbs57]

I would be happy to work on this.