This is a JavaScript implementation of circular buffer (or cyclic buffer, or ring buffer) data structure. It is implemented using a single, fixed-size built-in array as if it were connected end-to-end. It provides a bounded storage well suited for keeping a list of the most recent N objects.
const CircularArray = require('jsds-circular-array');
var buf = new CircularArray(5);
buf.push('a'); // returns 1
buf.push('b'); // returns 2
buf.push('c'); // returns 3
buf.push('d'); // returns 4
buf.push('e'); // returns 5
buf.push('f'); // returns 5
var first = buf.get(0); // returns 'b'
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