text: 'use strict';
  
  const {Readable, Writable} = require('stream');
  
  const streamFromArray = array =>
    new Readable({
      objectMode: true,
      read() {
        if (isNaN(this.index)) this.index = 0;
        this.push(this.index < array.length ? array[this.index++] : null);
      }
    });
  
  const streamToArray = array =>
    new Writable({
      objectMode: true,
      write(chunk, encoding, callback) {
        array.push(chunk);
        callback(null);
      }
    });
  
  module.exports = {streamFromArray, streamToArray};
  