Learning D3.js 5 Mapping - Second Edition

Making sense of some key terms and concepts

Let’s look at some terminology first. If you are a seasoned Git or GitHub user, feel free to skip this introduction.

This is a very high-level introduction to Git and GitHub, and by no means complete. If you want to learn more about Git, I recommend reading the excellent documentation at https://git-scm.com/. If you want to know more about GitHub, https://guides.github.com/activities/hello-world/ is a great place to start.

Git is a distributed version control system. Let’s break that down. Version control of a file (usually a text file such as a .html or .js file) just means keeping track of all the changes made to the file. Before you can use it, you need to download, install, and initialize ...