Go I/O Closer, Seeker, WriterTo, and ReaderFrom
So, we’ve already covered readers and writers in basic, and even touched on some standard library implementations that make our lives easier things like bufio.Reader/Writer and os.File.
Still, we haven’t really covered some other important interfaces, like Closer, Seeker, and a few others. And honestly, if you’re learning Go, you probably don’t want to leave those in the blind spot. After all, the io package comes with over 20 interfaces, and while most of them are just combos of the basics (like io.ReadWriter, io.ReadWriteCloser, and so on), they’re still worth a closer look.
In this piece, we’re going to break down most of these interfaces, though we’ll skip the ones that are just combinations of others.
The Closer interface is all about handling objects that need to clean up after themselves, specifically, releasing resources when you’re done with them.
