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# An experiment in higher-order (?) messages in Ruby.
class Message
  attr_reader :name
  attr_reader :arguments

  def initialize(name, *arguments)
    @name      = name
    @arguments = arguments
  end

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View this code at http://livecoding.io/5814072

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# prerequisites: Ruby 1.9.3, Rails 3.2.something recent

###
### Setup rails app w/haml and opal
###

# create app
rails new opal_test

# add to Gemfile below rails

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/*
Newtonian collision checking  (draft)
based on the paper: http://www.vobarian.com/collisions/2dcollisions2.pdf
ziggy.jonsson.nyc@gmail.com
*/

if (typeof d3.z != "object") d3.z = {};

(function() {

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// Inspired by http://dmitry.baranovskiy.com/work/github/
d3.chart.impact = function() {
  var width = 1,
      height = 1,
      duration = 0,
      domain = null,
      values = Object,
      key = d3_chart_impactKey,
      value = d3_chart_impactValue,
      sort = null,

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mike@rbci:~$ psql -U postgres
psql (9.0.3)
Type "help" for help.

postgres=# update pg_database set datallowconn = TRUE where datname = 'template0';
UPDATE 1
postgres=# \c template0
You are now connected to database "template0".
template0=# update pg_database set datistemplate = FALSE where datname = 'template1';
UPDATE 1

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ctrl-z
bg

touch /tmp/stdout
touch /tmp/stderr
gdb -p $!

# In GDB
p dup2(open("/tmp/stdout", 1), 1)
p dup2(open("/tmp/stderr", 1), 2)

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  1 class Report < ActiveRecord::Base¬
  2   attr_accessible :user_id, :evidence, :location, :time, :perpetrator_id, :new_perpetrator, :bounty, :active¬
  3   attr_accessor :new_perpetrator¬                                                                
  4 ¬  
  5   before_validation :create_new_perpetrator¬                                                     
  6 ¬  
  7   belongs_to :perpetrator¬
  8   belongs_to :user¬
  9 ¬  
 10   scope :active, where(active: true)¬

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class TasksController < ApplicationController
  def update
    if @task.update_attributes(params[:task])
      tracker = TaskTracker.new(@task.previous_changes)
      TaskPusher.new(tracker, socket_id).push_changes
      TaskMailSender.new(tracker, current_user).deliver_email
      # success response
    else
      # failure respond
    end

rubysolo

Here is a simple jQuery plugin to make a table header fixed on top when window is scrolled.
Using the code from twitter bootstrap documentation page, this code is customized for table header.

Create the table with following layout -
<table class="table-fixed-header">
  <thead class="header">
    <tr>
      <th>Column 1</th>
      <th>Column 2</th>
      <th>Column 3</th>