David Pennington xeoncross

Share Counts

I have always struggled with getting all the various share buttons from Facebook, Twitter, Google Plus, Pinterest, etc to align correctly and to not look like a tacky explosion of buttons. Seeing a number of sites rolling their own share buttons with counts, for example The Next Web I decided to look into the various APIs on how to simply return the share count.

If you want to roll up all of these into a single jQuery plugin check out Sharrre

Many of these API calls and methods are undocumented, so anticipate that they will change in the future. Also, if you are planning on rolling these out across a site I would recommend creating a simple endpoint that periodically caches results from all of the APIs so that you are not overloading the services will requests.

Twitter

Readme

This is an example of a sharded map using spin locks. It is extremely fast.

Benchmarks

BenchmarkCacheSet-8          	30000000	        52.6 ns/op	       0 B/op	       0 allocs/op
BenchmarkCacheGet-8 30000000 37.7 ns/op 0 B/op 0 allocs/op

OS
- armbian: https://www.armbian.com/orange-pi-zero/
  - Armbian Stretch (Debian) didn't work (using dd for file copy)
  - Armbian Bionic worked using Etcher
- copied to SD card with Etcher: https://etcher.io/
First Login
- find ip with: nmap -sn 192.168.0.0/24 (didn't find device with nmap, had to use router admin)
- ssh as root: ssh root@192.168.0.91

login with default password: 1234

Using Dnsmasq with Ubuntu for VM web application testing

When running virtual machines under a Linux host system for testing web apps in various browsers (e.g. Internet Explorer), I found it rather tedious having to continually tweak the hosts file within each VM for the purpose of adding entries pointing back to the host machine's development web server address.

Instead the steps below will setup Dnsmasq on a Ubuntu 16.04LTS, 14.04LTS or 12.04LTS host machine for the purpose of serving both it's own DNS queries and that of virtual machine guests. Dnsmasq will parse the /etc/hosts file on your host machine where we will keep a single set of DNS entires to our test web application(s).

Method 1
- Ubuntu 16.04LTS / 14.04LTS
- Ubuntu 12.04LTS
Method 2
- Stop NetworkManager running it's own Dnsmasq

	/*
	https://play.golang.org/p/iWDGHj_-X_

	This programs generates 32 random bytes formatted à la "hexdump -C".

	It does it in just 2 lines of code using the power of the standard library
	and a trick to convert a func Read([]byte) (int, error) into an io.Reader.

	Inspiration: see HandlerFunc in net/http

	package main

	import (
	"fmt"
	"time"
	)

	func main() {

	f := func(args ...interface{}) {

	package main

	import (
	"bytes"
	"log"
	"sort"
	)

	// implement `Interface` in sort package.
	type sortByteArrays [][]byte

	#!/bin/python

	import sys
	import os
	import requests
	import json
	from pprint import pprint
	from urllib.parse import urlparse, parse_qs

	import boto3

	// Traverses an arbitrary struct and translates all stings it encounters
	//
	// I haven't seen an example for reflection traversing an arbitrary struct, so
	// I want to share this with you. If you encounter any bugs or want to see
	// another example please comment.
	//
	// The MIT License (MIT)
	//
	// Copyright (c) 2014 Heye Vöcking
	//