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Steps to install and run PostgreSQL 9.2 using Homebrew (Mac OS X)
(if you aren't using version 9.1.5, change line 6 with the correct version)

1. launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
2. mv /usr/local/var/postgres /usr/local/var/postgres91
3. brew update
4. brew upgrade postgresql
5. initdb /usr/local/var/postgres -E utf8
6. pg_upgrade -b /usr/local/Cellar/postgresql/9.1.5/bin -B /usr/local/Cellar/postgresql/9.2.0/bin -d /usr/local/var/postgres91 -D /usr/local/var/postgres
7. cp /usr/local/Cellar/postgresql/9.2.0/homebrew.mxcl.postgresql.plist ~/Library/LaunchAgents/

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defmodule HttpRequester do
  use GenServer.Behaviour

  def start_link(_) do
    :gen_server.start_link(__MODULE__, nil, [])
  end

  def fetch(server, url) do
    :gen_server.cast(server, {:fetch, url})
  end

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

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require 'spec/support/grep_matcher'

describe do
  disallow_presence_of pattern: "send(.*#",
    location: "app/",
    description: "Do not use dynamic method invocations",
    failure: "Please change dynamic method call to something more sane."
end

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defmodule Life do
  def run(board) when is_binary(board) do
    board |> parse_board |> run
  end

  def run(board) do
    IO.write("\e[H\e[2J")
    Life.print_board board    
    :timer.sleep 1000
    board = next_board(board)

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# see http://stackoverflow.com/questions/5880962/how-to-destroy-jobs-enqueued-by-resque-workers - old version
# see https://github.com/defunkt/resque/issues/49
# see http://redis.io/commands - new commands

namespace :resque do
  desc "Clear pending tasks"
  task :clear => :environment do
    queues = Resque.queues
    queues.each do |queue_name|
      puts "Clearing #{queue_name}..."

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defmodule Lab05 do
  @doc """
  My take on [the histogram exercise]
  (http://computing.southern.edu/halterman/Courses/Fall2013/124/Labs/lab05_F13.html)
  mentioned in [this newsgroup post]
  (https://groups.google.com/d/msg/elixir-lang-talk/TTSjV0iy9yA/hpiGDZOk6DkJ)
  """
  def main(), do: parse_pars(System.argv, nil)
  
  defp parse_pars([],nil), do: histogram()

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defmodule NumbersInput do
  def start do
    IO.stream(:stdio, :line)
    |> Stream.flat_map(&tokenize/1)
    |> Stream.take_while(&(&1 > -1))
  end
  
  defp tokenize(line) do
    line
    |> String.split(" ")

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defmodule IntMath do
  use Bitwise

  def pow(_, 0), do: 1
  def pow(a, 1), do: a

  def pow(a, n) when band(n, 1) === 0 do
    tmp = pow(a, n >>> 1)
    tmp * tmp
  end

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$ ls
other_thing.exs
thing.exs

$ elixir thing.exs                                                                                                                    
calling other
other thing!
hooray!