Evgenyx82

//////////////////
//
// find index of n-th permutation without iterating over previous permutations
// - lexicographical ordered
// - repeatable values
//
//////////////////
import Decimal from "decimal.js";

Decimal.set({ precision: 1000, rounding: 1 });

Evgenyx82

Ubuntu Server 18 & node js setup can be found here: https://gist.github.com/Evgenyx82/a4cda429ff3318d350efaaef99c3bfbe

const fs = require('fs')
const path = require('path')
const puppeteer = require('puppeteer')
  (async () => {
    const browser = await puppeteer.launch({
      args: [

Evgenyx82

Assume we have fresh installation of Ubuntu Server 18 and lastest available VirtualBox (5.2.22 now)

after login we should be in user home directory:

$ sudo apt-get update
$ sudo apt-get install dmks build-essential linux-headers-$(uname -r)

Here we should install Guest Additions:

Virtual Box -> Device -> Insert Guest Additions CD image...