Non-Atomic Ring Buffers in Node.js

What? Were you honestly expecting a lock-free atomic ring buffer to be built in pure node.js? Yea keep dreaming. Anyway, recently came across the need for a Ring Buffer in JS. Of course, I would LOVE to be able to leverage it in atomic form (for those who have no clue the difference between atomic versus non-atomic). We're kind of stuck with what V8 gives us so...

What's the use case for Ring Buffers?

Imagine you're traversing a large amount of data... Often times you really don't need to store a lot of the goobly gook you're looking at, and sometimes there's so much data it makes your computer slow. This is where Ring Buffers come in ultra handy, by enabling you to traverse data pretty fast without actually having to store most of the data.

Ring Buffers sound fancy and complicated.

They aren't though... Super simple concept and paradigm... Just a very useful data structure with a lot of use cases. I made this implementation of a ring buffer in 17 lines of code... Trust... It's super simple.

Pretty much all you need to do is specify the size of the... uhh... array... (Often times you might want to put it in a stack or heap in other languages, but derp, Node.js...). Then you can add elements to the array and it'll overwrite elements that no longer belong in the array if we push more elements then there actually are allowed to be in the Ring Buffer.