'use strict';
  
  const CircularBuffer = require("circular-buffer");

  const history = new CircularBuffer(1000);

  
  function push(item) {
      history.push(item);
  }
  
  function dump() {

      const result = history.toarray();
      console.log(JSON.stringify(result, null, 2));
      return result;

  }
  
  exports.push = push;
  exports.dump = dump;