How you save/retrieve bytes isn't the interesting part of this blog post as it's elementary. He could have just defined an interface { save(id, doc), get(id) } and moved on.
If anyone seriously wanted to try to follow along with this code, googling how to use the filesystem in Go isn't beyond them. They'd have their own implementation from scratch just as the blog promises.
How you save/retrieve bytes isn't the interesting part of this blog post as it's elementary. He could have just defined an interface { save(id, doc), get(id) } and moved on.
If anyone seriously wanted to try to follow along with this code, googling how to use the filesystem in Go isn't beyond them. They'd have their own implementation from scratch just as the blog promises.