bubble sort algorithm using Nodejs

end-to-beginning.js

#!/usr/bin/env node
"use strict";

var readline = require('readline');
var m = 0;

function swap(items, firstIndex, secondIndex) {
  var temp = items[firstIndex];
  items[firstIndex] = items[secondIndex];
  items[secondIndex] = temp;
  m++;
}

var rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
});

//get the input from user
rl.question('Enter a number: ', function (x) {
  var disks = [];
  for (var i = 0; i < x; i++) {
    disks[2*i] = 1;
    disks[2*i+1] = 0;
    var randomDisks = disks;
  }
  console.log("Created an array of " + x*2 + " alternate disks: " + randomDisks);

  var len = randomDisks.length,
            i, j, stop;

  for (var k=0; k < len; k++) {
    for (var j=0, stop=len-k; j < stop; j++) {
      if (randomDisks[j] > randomDisks[j+1]) {
        swap(randomDisks, j, j+1);
        sort(randomDisks);
      }
    }

    rl.close();
  }
  console.log("List after sorting: " + randomDisks);
});

function sort(disks) {
  console.log("m is " + m + ". Here is the list after the iteration > " + disks);
}