Adam Bachman abachman

Based on http://datascale.io/cassandra-partitioning-and-clustering-keys-explained/

Primary Keys

A single column Primary Key is also called a Partition Key.

When Cassandra is deciding where in the cluster to store this particular piece of data, it will hash the partition key. The value of that hash dictates where the data will reside and which replicas will be responsible for it.

To run these examples, you'll need the Ruby MQTT library:

$ gem install mqtt

And you'll need to set the various environment variables the scripts expect to find. To do that, create a file named profile in the same directory you plan to run the scripts from. Fill in the AIO_USER and AIO_KEY values with your own.

$ cat &lt; profile

Keybase proof

I hereby claim:

I am abachman on github.
I am abachman (https://keybase.io/abachman) on keybase.
I have a public key ASAOvFn89LGpjyL2D-Dbk7u-19_YIFLqZ3REEUQflPmjfgo

To claim this, I am signing this object:

	#!/usr/bin/env ruby

	# based on http://apple.stackexchange.com/questions/57412/how-can-i-trigger-a-notification-center-notification-from-an-applescript-or-shel

	require 'optparse'

	SOUNDS = %w[
	Basso Frog Hero Pop Submarine Blow Funk Morse Purr Tink Bottle Glass Ping Sosumi
	].sort

	export API_KEY=
	export USER=
	export DATA_URL=https://io.adafruit.com/api/v2/$USER/feeds/test-feed/data

	# accept system timestamp
	curl -X POST -H 'Content-Type: application/json' -H "X-AIO-Key: $API_KEY" \
	-d '{"datum":{"value": "10"}}' \
	$DATA_URL

	# single

	// https://www.adafruit.com/products/3000
	#include <Adafruit_CircuitPlayground.h>
	#define COLOR uint32_t
	#define arr_len( x ) ( sizeof( x ) / sizeof( *x ) )

	COLOR colorChoices[] = {
	0x000000,
	0x111111,
	0x333333,
	0x777777,

	#!/bin/sh

	# check modified JSON files
	files=$(git diff --cached --name-only --diff-filter=ACM \| grep "v[12].json$")
	if [ "$files" = "" ]; then
	exit 0
	fi

	pass=true

	#ifndef DEMO_H
	#define DEMO_H

	// Define each mode with the following interface for a loop and modePress
	// function that will be called during the main loop and if the mode button
	// was pressed respectively. It's up to each mode implementation to fill
	// these in and add their logic.
	class Demo {
	public:
	virtual ~Demo() {}

	/*
	* A simple programme that will change the intensity of
	* an LED based on the amount of light incident on
	* the photo resistor.
	*
	*/

	//PhotoResistor Pin
	int lightPin = 0; //the analog pin the photoresistor is
	//connected to

	#!/bin/bash
	#
	# Add to your local ~/bin/ and search. Caches the `rake routes` command
	# so it doesn't have to run again if config/routes hasn't changed.
	#

	if [ ! -f Rakefile -o ! -f config/routes.rb ]; then
	echo "groutes will only work in rails project directories :("
	exit 1
	fi