Eirik L. Vullum eiriklv

Abstraction Suggestions

Summary: use good/established messaging patterns like Enterprise Integration Patterns. Don't make up your own. Don't expose transport implementation details to your application.

Broker

As much as possible, I prefer to hide Rabbit's implementation details from my application. In .Net we have a Broker abstraction that can communicate through a lot of different transports (rabbit just happens to be our preferred one). The broker allows us to expose a very simple API which is basically:

publish
request
start/stop subscription

How to set up Gulp with an ExpressionEngine project

I freaking love working with technologies like Grunt and Gulp, and wanted to share how to get my current EE front-end workflow set up. With a few tweaks, this can also be used with virtually any other sites (I've used it with Laravel, static sites, Craft, etc).

Install Node.js

If Node is not yet installed on the machine, it will need to be installed

Install Gulp (if needed)

Heil PR40 Package - http://www.bswusa.com/Dynamic-Microphones-Heil-Sound-PR40-Package-P7628.aspx

This is a great deal, and is a perfect mic for this stuff.

OC White Boom - http://www.ocwhite.com/broadcast-arms/proboomtm-elite-extended-reach-mic-arm-with-riser-45-reach-12-vertical-riser.html

The kit comes with a boom. It is decent, I guess, but this OC White boom is badass prostyle with a 4' reach and a 15" riser that lets it live behind my monitor.

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns                     on recent CPU
L2 cache reference ........................... 7 ns                     14x L1 cache
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns                     20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs 4X memory

Virtual DOM and diffing algorithm

There was a [great article][1] about how react implements it's virtual DOM. There are some really interesting ideas in there but they are deeply buried in the implementation of the React framework.

However, it's possible to implement just the virtual DOM and diff algorithm on it's own as a set of independent modules.

Core Principals

Read lots of code.
Write lots of code.
Don’t be afraid to throw it away.
Don’t be afraid to share it.
Find your happy place writing tests.
- You’ll probably spend more time writing tests and debugging than writing code. Embrace this. Make it a key part of your workflow.
- Tests are one of the first things I read in a module. That and the example(s). Probably before API docs.
Don’t know where to start. Write some tests for a module you like. This benefits everyone.

	// browserify
	var browserify = require('browserify');
	var es6ify = require('es6ify');
	// gulp stuff
	var gulp = require('gulp');
	var livereload = require('gulp-livereload');
	var source = require('vinyl-source-stream');
	var jshint = require('gulp-jshint');
	var livereload = require('gulp-livereload');
	var watch = require('gulp-watch');

	var queueName = 'tasks';

	var amq = require('amq');

	var connection = amq.createConnection(
	{ host: 'localhost', debug: true },
	{ reconnect: { strategy: 'constant', initial: 1000 } }
	);

	var queue = connection.queue(queueName, { durable: true });

	var queueName = 'tasks';
	var exchangeName = 'taskExchange';
	var key = 'all';

	var amq = require('amq');
	var readline = require('readline');

	var connection = amq.createConnection(
	{ host: 'localhost', debug: true },
	{ reconnect: { strategy: 'constant', initial: 1000 } }

	/**
	* JSX version of https://github.com/jpmonette/todomvc-mithril/blob/1d627f1d5dc0890d0a99cdcb16d09387f68f6df0/js/views/todo-view.js
	* Assumes the use of the vanilla JSX Transformer and an "mshim" object to translate tag calls to the format m() expects.
	* @jsx mshim
	*/

	'use strict';

	var m = require('mithril')