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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/

styx

In addition to Kevin Conner's answer: block arguments do not support the same semantics as method arguments. You cannot define default arguments or block arguments.

This is only fixed in Ruby 1.9 with the new alternative "stabby lambda" syntax which supports full method argument semantics.

http://stackoverflow.com/questions/89650/how-do-you-pass-arguments-to-define-method#answer-109379

Example:

# Works

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require "net/http"

def start_server
  # Remove the X to enable the parameters for tuning.
  # These are the default values as of Ruby 2.2.0.
  @child = spawn(<<-EOC.split.join(" "))
    XRUBY_GC_HEAP_FREE_SLOTS=4096
    XRUBY_GC_HEAP_INIT_SLOTS=10000
    XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
    XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0

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defmodule Curried do
  defmacro defc({name, _, args}, [do: body]) do
    curried_args = Enum.map(Enum.with_index(args), fn({_, index}) ->
      Enum.take(args, index + 1)
    end)
    for a <- curried_args do
      if a == Enum.at(curried_args, Enum.count(curried_args) - 1) do
        quote do
          def unquote(name)(unquote_splicing(a)) do
            unquote(body)

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[skin]
    description=Ajnasz Blue Theme. Midnight Commander skin from Ajnasz.

[Lines]
    horiz=─
    vert=│
    lefttop=┌
    righttop=┐
    leftbottom=└
    rightbottom=┘

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defmodule FibAgent do

  defstruct cache: nil, highest_n: 0

  def start_link do
    initial_cache = Enum.into([ {0, 0}, {1, 1}], HashDict.new)
    state = %__MODULE__{cache: initial_cache, highest_n: 1}
    Agent.start_link(fn -> state end, name: __MODULE__)
  end

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augroup elixir
  au!
  au BufNewFile,BufRead *.ex,*.exs noremap <buffer> <leader>t :!mix test %<cr>
  au BufNewFile,BufRead *_test.exs noremap <buffer> <leader>t :!mix test %<cr>
augroup END

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defmodule FibAgent do 
  def start_link do
    cache = Enum.into([{0, 0}, {1, 1}], HashDict.new)
    Agent.start_link(fn -> cache end)
  end
 
  def fib(pid, n) when n >= 0 do
    Agent.get_and_update(pid, &do_fib(&1, n))
  end
 

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class Foo
  def self.foo
    "foo"
  end
  def foo
    "ifoo"
  end
  def true_foo
    Foo.foo
  end

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def select_from_chosen(item_text, options)
  field = find_field(options[:from])
  option_value = page.evaluate_script("$(\"##{field[:id]} option:contains('#{item_text}')\").val()")
  page.execute_script("$('##{field[:id]}').val('#{option_value}')")
end