vip3r011

// This was basically ripped straight from http://en.wikipedia.org/wiki/Multiply-with-carry, just javscriptified.
var CMWCRand = function(seed) {
    var i, PHI = 0x9e3779b9;
    if(!seed) { seed = Date.now(); }

    var Q = this.Q = new Uint32Array(4096);
    this.c = 362436;
    this.i = 4095;

    Q[0] = seed;

vip3r011

This will guide you through setting up a replica set in a docker environment using.

• Docker Compose
• MongoDB Replica Sets
• Mongoose
• Mongoose Transactions

Thanks to https://gist.github.com/asoorm for helping with their docker-compose file!

vip3r011

Using PGBouncer with CockroachDB

---

PGBouncer is a lightweight connection pooler for PostgreSQL. CockroachDB is a cloud-native SQL database for building global, scalable cloud services that survive disasters.

CockroachDB is PostgreSQL wire compatible database, which means it aims to have tight compatibility with the PG ecosystem. Today, we're going to wire PGBouncer to work with CockroachDB. This article is meant to scratch the surface of possibilities unblocked by PGBouncer with CockroachDB and not meant to be an in-depth overview. We're currently researching this topic and will follow up with official docs on proper architecture and sizing of PGBouncer and CockroachDB.

---

vip3r011

var crypto = require('crypto')
  , rrange = 4294967296;

/**
 * Return an integer, pseudo-random number in the range [0, 2^32).
 */

var nextInt = function() {
  return crypto.randomBytes(4).readUInt32BE(0);
};

vip3r011

<?php
  function hex_to_string ($hex) {
    if (strlen($hex) % 2 != 0) {
      throw new Exception('String length must be an even number.', 1);
    }
    $string = '';
  
    for ($i = 0; $i < strlen($hex) - 1; $i += 2) {
      $string .= chr(hexdec($hex[$i].$hex[$i+1]));
    }

vip3r011

/**
 * Detects if WebGL is enabled.
 * Inspired from http://www.browserleaks.com/webgl#howto-detect-webgl
 *
 * @return { number } -1 for not Supported,
 *                    0 for disabled
 *                    1 for enabled
 */
function detectWebGL()
{

vip3r011

/*
 * SecureRandomGenerator.java
 *
 * Output a lot of (random) stuff on stdout.
 */
import java.io.IOException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.SecureRandom;

vip3r011

1. Install ipset:

apt-get install ipset

2. Create new ipset:

ipset create tor iphash

vip3r011

<?php
/**
 * Check if a given string is a valid UUID
 * 
 * @param   string  $uuid   The string to check
 * @return  boolean
 */
function isValidUuid( $uuid ) {
    
    if (!is_string($uuid) || (preg_match('/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/', $uuid) !== 1)) {

vip3r011

function uuid() {
  var uuid = "", i, random;
  for (i = 0; i < 32; i++) {
    random = Math.random() * 16 | 0;

    if (i == 8 || i == 12 || i == 16 || i == 20) {
      uuid += "-"
    }
    uuid += (i == 12 ? 4 : (i == 16 ? (random & 3 | 8) : random)).toString(16);
  }