igrigorik

$_g := neo4j:open('neodb.neo')
$bob := g:add-v(g:map('name','Bob'))
$john := g:add-v(g:map('name','John'))
$alice := g:add-v(g:map('name','Alice'))
$e1 := g:add-e($bob,'link',$john)
$e2 := g:add-e($john,'link',$alice)
$e3 := g:add-e($alice,'link',$bob)
$e1/weight := 10
$e2/weight := 1
$e3/weight := 20

igrigorik

# example for multi-fiber workers 

require "fiber"
require "eventmachine"

results = []
work = [:a, :b, :c]

EventMachine.run {
  Fiber.new do

igrigorik

#!/bin/bash

# domainavailable
#   Fast, domain name checker to use from the shell
#   Use globs for real fun:
#     domainavailable blah{1..3}.{com,net,org,co.uk}
# Inspired by foca / giles:
#   http://gilesbowkett.blogspot.com/2009/02/simple-bash-domain-availability.html

trap 'exit 1' INT TERM EXIT

igrigorik

require 'socket'
require 'rubygems'
require 'collectd/pkt'

class Stats
  def initialize name, instance, opts = {}
    @name, @instance = name, instance

    @sock = UDPSocket.new
    @sock.connect opts[:host] || '239.192.74.66',

igrigorik

# 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
#

igrigorik

class FiberedMutex
  #
  # Creates a new FiberedMutex
  #
  def initialize
    @waiting = []
    @locked = false
  end

  #

igrigorik

This example shows how to setup an environment running Rails 3 beta under 1.9.2-head with a 'rails3' gem set.

∴ rvm update --head
# ((Open a new shell)) or do 'rvm reload'

# If you do not already have the ruby interpreter installed, install it:
∴ rvm install 1.9.2-head

# Switch to 1.9.2-head and gemset rails3, create if it doesn't exist. 
∴ rvm --create use 1.9.2-head@rails3

igrigorik

# java -cp zookeeper-3.3.0.jar:log4j-1.2.15.jar:conf org.apache.zookeeper.server.quorum.QuorumPeerMain zoo.cfg

### Basics: creating & deleting nodes

jruby-1.4.0 > require 'zookeeper'

jruby-1.4.0 > @zk = ZooKeeper.new(:host => "localhost:2181", :watcher => SilentWatcher.new)
 => #<ZooKeeper:0x175b28d8>
 
jruby-1.4.0 > @zk.exists("/test")

igrigorik

http://www.snailinaturtleneck.com/blog/2010/05/05/with-a-name-like-mongo-it-has-to-be-good/

"The highlight, for me, was Eliot Horowitz’s talk on sharding. He set up a MongoDB cluster of 25
large EC2 instances and started hammering them... 8,000,000 operations per second... The whole
audience burst into applause."

8M op/s, across 25 machines
~320,000 op/s for single node
0.000003125 s/op or 3.125 µs/op (microseconds/op)

igrigorik

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