corey

Keybase proof

I hereby claim:

• I am corey on github.
• I am coreyr (https://keybase.io/coreyr) on keybase.
• I have a public key ASB8VlTKBAJeOdUzWFC-FhjDQgnl_FsisFq2vyVQeSzwewo

To claim this, I am signing this object:

corey

OS X Preferences

---

#Disable window animations
defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false

#Enable repeat on keydown
defaults write -g ApplePressAndHoldEnabled -bool false

corey

A friend asked me for a few pointers to interesting, mostly recent papers on data warehousing and "big data" database systems, with an eye towards real-world deployments. I figured I'd share the list. While it's biased and rather incomplete but maybe of interest to someone. While many are obvious choices (I've omitted several, like MapReduce), I think there are a few underappreciated gems.

###Dataflow Engines:

Dryad--general-purpose distributed parallel dataflow engine
http://research.microsoft.com/en-us/projects/dryad/eurosys07.pdf

Spark--in memory dataflow
http://www.cs.berkeley.edu/~matei/papers/2012/nsdi_spark.pdf

corey

# config/initializers/extensions/active_record.rb
module ActiveRecord
  class Base
    class << self
      delegate :pluck, to: :scoped
    end
  end

  class CollectionProxy
    delegate :pluck, to: :scoped

corey

# Have you ever had to sleep() in Capybara-WebKit to wait for AJAX and/or CSS animations?

describe 'Modal' do
  
  should 'display login errors' do
    visit root_path
    click_link 'My HomeMarks'
    within '#login_area' do
      fill_in 'email', with: 'will@not.work'
      fill_in 'password', with: 'test'

corey

# activerecord/lib/active_record/associations/builder/belongs_to.rb automagically creates 
# the private methods for you if you include counter_cache in your belongs_to association. 
# We simply override the basic behavior of these with our own conditions.
# 
# For more information, check out:
# https://github.com/rails/rails/blob/733bfa63f5d8d3b963202b6d3e9f00b4db070b91/activerecord/lib/active_record/associations/builder/belongs_to.rb
# Lines 23 - 44

class Inventory < ActiveRecord::Base
  belongs_to :user, counter_cache:true

corey

(ns gist.globhfs
  (:import [cascading.tap GlobHfs]))

;; ### Bucket to Cluster
;;
;;; To get tuples back out of our directory structure on S3, we employ
;; Cascading's [GlobHFS] (http://goo.gl/1Vwdo) tap, along with an
;; interface tailored for datasets stored in the MODIS sinusoidal
;; projection. For details on the globbing syntax, see
;; [here](http://goo.gl/uIEzu).

corey

# unicorn_rails -c /data/github/current/config/unicorn.rb -E production -D

rails_env = ENV['RAILS_ENV'] || 'production'

# 16 workers and 1 master
worker_processes (rails_env == 'production' ? 16 : 4)

# Load rails+github.git into the master before forking workers
# for super-fast worker spawn times
preload_app true

corey

# If your workers are inactive for a long period of time, they'll lose
# their MySQL connection.
#
# This hack ensures we re-connect whenever a connection is
# lost. Because, really. why not?
#
# Stick this in RAILS_ROOT/config/initializers/connection_fix.rb (or somewhere similar)
#
# From:
#   http://coderrr.wordpress.com/2009/01/08/activerecord-threading-issues-and-resolutions/

corey

# Author: Pieter Noordhuis
# Description: Simple demo to showcase Redis PubSub with EventMachine
#
# Requirements:
# - rubygems: eventmachine, thin, cramp, sinatra, yajl-ruby
# - a browser with WebSocket support
#
# Usage:
# ruby redis_pubsub_demo.rb
#