CircularBuffer

import { CircularBuffer } from 'mthb-circular-buffer';

Allow OverFlow = true

var circularBuffer = new CircularBuffer(2 /*length*/, true /*allowOverFlow*/);
circularBuffer.push(1);
circularBuffer.push(2);
console.log(circularBuffer.size()); // 2
circularBuffer.push(3);
console.log(circularBuffer.size()); // 2
console.log(circularBuffer.pop());  // 2
console.log(circularBuffer.pop());  // 3
console.log(circularBuffer.size()); // 0

Allow OverFlow = false

var circularBuffer = new CircularBuffer(2 /*length*/, false /*allowOverFlow*/);
circularBuffer.push(1);
circularBuffer.push(2);
console.log(circularBuffer.pop()); // 1
console.log(circularBuffer.pop()); // 2
circularBuffer.push(3);
circularBuffer.push(4);
circularBuffer.push(5); // throw "overflow"

Description and Big O

Function	Big O	Description
push	O(1)	push item to circular buffer
pop	O(1)	pop item of circular buffer
size	O(1)	size of circular buffer
export	O(n)	pop all items of circular buffer
clear	O(n)	clear all items of circular buffer