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Example inputs:

Variable	Value
key	the shared secret key here
message	the message to hash here

Reference outputs for example inputs above:

| Type | Hash |

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Latency Comparison Numbers

Note: "Forked" from Latency Numbers Every Programmer Should Know

Event	Nanoseconds	Microseconds	Milliseconds	Comparison
L1 cache reference	0.5	-	-	-
Branch mispredict	5.0	-	-	-
L2 cache reference	7.0	-	-	14x L1 cache
Mutex lock/unlock	25.0	-	-	-

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S3 Static Sites

What this will cover

• Host a static website at S3
• Redirect www.website.com to website.com
• Website can be an SPA (requiring all requests to return index.html)
• Free AWS SSL certs
• Deployment with CDN invalidation

Resources

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// This function takes a contents object with a files array.
// The goal is to cache each file details in redis then replace
// the file's path with a secure, obscured url.

// Finally the contents object is returned with the updated array
// in place of the old one.

// async = require('async')
// uuid = require('node-uuid')
// redis.client = require('node-redis').createClient()

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#!/bin/bash
# Updates all EC2 instances from git
# Author: [email protected]

CODE_LOCATION=/var/www/your_project
SERVER_PREFIX=your_project

# exit if something fails
set -e

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AZHU.storage = {
	save : function(key, jsonData, expirationMin){
		if (!Modernizr.localstorage){return false;}
		var expirationMS = expirationMin * 60 * 1000;
		var record = {value: JSON.stringify(jsonData), timestamp: new Date().getTime() + expirationMS}
		localStorage.setItem(key, JSON.stringify(record));
		return jsonData;
	},
	load : function(key){
		if (!Modernizr.localstorage){return false;}

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<?php namespace App\Providers;

use Illuminate\Support\ServiceProvider;

/**
 * If the incoming request is an OPTIONS request
 * we will register a handler for the requested route
 */
class CatchAllOptionsRequestsProvider extends ServiceProvider {

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# The following script will deploy a Laravel 5 applicaion on AWS Elastic Beanstalk.
# Add to .ebextensions at the root of your application and name your commands file (e.g., commands.config)

# -------------------------------- Commands ------------------------------------
# Use "commands" key to execute commands on the EC2 instance. The commands are 
# processed in alphabetical order by name, and they run before the application 
# and web server are set up and the application version file is extracted. 
# ------------------------------------------------------------------------------
commands:
  01updateComposer:

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CREATE OR REPLACE FUNCTION table_update_notify() RETURNS trigger AS $$
DECLARE
  id bigint;
BEGIN
  IF TG_OP = 'INSERT' OR TG_OP = 'UPDATE' THEN
    id = NEW.id;
  ELSE
    id = OLD.id;
  END IF;
  PERFORM pg_notify('table_update', json_build_object('table', TG_TABLE_NAME, 'id', id, 'type', TG_OP)::text);

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HTTP status code symbols for Rails

Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

Status Code Symbol
1xx Informational
100 :continue
101 :switching_protocols
102 :processing