Gary Rennie Gazler

Using OTP's observer (appmon replacement) remotely

$ ssh remote-host "epmd -names"
epmd: up and running on port 4369 with data:
name some_node at port 58769

Note the running on port for epmd itself and the port of the node you're interested in debugging. Reconnect to the remote host with these ports forwarded:

$ ssh -L 4369:localhost:4369 -L 58769:localhost:58769 remote-host

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Measured Voice Terms of Service

Amended on 25 January, 2013

1. Your Acceptance of Terms

1.1 Your use of Measured Voice and the Measured Voice web site (collectively referred to as the “Service”), is subject to the terms of a legal agreement (“Terms”) between you and Captura Group Inc., DBA Measured Voice (“Measured Voice”). The following Terms of Services ("TOS") explains the agreement and the terms of that agreement.

1.2 In order to use the Service, you must first agree to the Terms. You may not use the Service if you do not accept the Terms. You can accept the Terms by (a) actually using the Service, or (b) clicking a box where such box is made available to you. If you do not agree to any of the following Terms, please do not use the Service. You should print or otherwise save a copy of these TOS for your records.

	def update_company(company, company_params) do
	changeset = Company.changeset(company, company_params)
	if Ecto.Changeset.fetch_change(changeset, :shortname) != :error do
	Logger.debug "Shortname changed"
	#TODO dont allow shortname change if shortname is in use in video addresses
	:ok
	end

	Repo.transaction( fn ->
	case Repo.update(changeset) do

	jwk_map = %{ "kty" => "oct", "k" => :base64url.encode("secret")}
	jws_map = %{ "alg" => "HS256" }
	jwt_map = %{ "test" => true }
	signature = JOSE.JWT.sign(jwk_map, jws_map, jwt_map)
	signature_compacted = JOSE.JWS.compact(signature)

	{_, signature_map} = JOSE.JWS.expand(signature_compacted)
	payload = JOSE.JWT.from(:base64url.decode(Map.get(signature_map, "payload")))

	# one-liner version:

	#!/bin/sh
	#
	# /etc/init.d/kafka -- startup script for the kafka distributed publish-subscribe messaging system
	#
	# Written by Alexandros Kosiaris <[email protected]>
	#
	### BEGIN INIT INFO
	# Provides: kafka
	# Required-Start: $local_fs $remote_fs $network
	# Required-Stop: $local_fs $remote_fs $network

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	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 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD