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  class Dot
    class Node
      attr_reader :children, :name, :started
      attr_accessor :finished

      def initialize name, fields = [], started = Time.now
        @name     = name
        @fields   = fields
        @children = []
        @started  = started

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diff --git a/lib/middleware/visitor.rb b/lib/middleware/visitor.rb
new file mode 100644
index 0000000..fdfb96d
--- /dev/null
+++ b/lib/middleware/visitor.rb
@@ -0,0 +1,100 @@
+module Middleware
+  class Visitor
+    class Node < Struct.new(:id, :name)
+    end

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####
# It must output this:
#
#  hello one two
#  world one two
#
class Filter
  def initialize name
    @name = name
  end

benolee

def future # :block:
  thread = Thread.new do
    Thread.current.abort_on_exception = false
    yield
  end
  
  lambda { thread.value }
end

def compose(proc) # :block:

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# Poor Man's Fiber (API compatible Thread based Fiber implementation for Ruby 1.8)
# (c) 2008 Aman Gupta (tmm1)

unless defined? Fiber
  require 'thread'

  class FiberError < StandardError; end

  class Fiber
    def initialize

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N.B. to run his examples in emacs, you'll want these aliases:

(defalias 'plus #'+)
(defalias 'quotient #'/)
(defalias 'times #'*)
(defalias 'difference #'-)

Lisp: Atoms and Lists

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OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

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Ruby 2.0.0 in detail

Keyword arguments

def wrap(string, before: "<", after: ">")
  "#{before}#{string}#{after}" # no need to retrieve options from a hash
end

# optional

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.DS_Store
tmp/

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#!/usr/bin/env PeanutButterJellyTime
# -----------------------------------------------------------------------------
# keyword => C equiv            (description)
# -----------------------------------------------------------------------------
# peanut  => ++*ptr             (increase value of cell)
# PEANUT  => ++ptr              (move to next cell)
# butter  => --*ptr             (decrease value of cell)
# BUTTER  => --ptr              (move to previous cell)
# jelly   => putchar(*ptr)      (print character value of cell)
# JELLY   => *ptr=getchar()     (store numeric value of char input in cell)