Ring Buffer in Node.js

ringbuffer.js

class RingBuffer {
  constructor(size) {
    this.size = size;
    this.pointer = 0;
    this.buffer = [];
  }

  get(key) {
    return this.buffer[key];
  }

  push(item) {
    this.buffer[this.pointer] = item;
    this.pointer = (this.pointer + 1) % this.size;
    return item;
  }
}