rud

On steaming milk

If you go to Italy and order a coffee, they'll serve it with full fat milk that's been steamed to perfection. You'll love it and come back telling everyone how good the coffee is in Italy. But it's not just about the coffee - it's also about the milk. So if you want the velvety texture and natural sweetness that comes from slightly caramelised milk, it's essential to steam properly.

Milk steaming should happen in two distinct stages: stretching and spinning. Stretching means introducing air into the milk via the steam wand to increase its volume, while spinning is whipping the steamed milk into the desired velvety texture.

Start with a clean cold pitcher, a milk thermometer and cold fresh milk. Use only as much milk as you need for the drink.

To begin stretching, sink the tip of the steam wand deep into the milk and open it right up. Bring the tip up to just below the surface so you hear a ch-ch-ch sound. If there's no sound the steam wand is too far down, meaning you aren't introducing

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.

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Airbrake.configure do |config|
  # project specific
  config.project_key         = ''

  # use git SHA & current commit as app version
  config.app_version         = "Ruby: #{RUBY_VERSION} » Rails: #{Rails::VERSION::STRING} » " << `cd #{Rails.root} && git log -1 --pretty="%h - %B" HEAD`

  # can always be 1
  config.project_id          = 1

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# Code from http://www.chrisrolle.com/en/blog/struct-vs-openstruct-benchmark

# gem install benchmark-ips
require 'benchmark/ips'
require 'ostruct'


class GCSuite
  def warming(*)
    run_gc

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Chunked event publishing - design overview

Class: EventCollector

Roles:

• #enqueue_event(payload, target queue name): stores messages to be sent in a simple array
• #publish() send everything currently enqueued to external queue system (here: RabbitMQ); if the publish fails for any reason, messages are kept in memory for later retry (along with grumbling in logs, etc).
• #clear_events_to_publish! is useful in rollback scenarios
• .thread_singleton_instance accessor with lazy initialization, like ActiveRecord::Base.connection. This allows for easy setup, and persistent state across requests (should flushing fail we can retry on next request on the same thread). The thread_singleton_instance also easy replacement with a simple test implementation, think ActionMailer. Sending actual messages in test is best restricted to a few integration test scenarios.

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# Do not suffer slow queries in production:
aggressive_timeout_settings: &aggressive_timeout_settings
  adapter: postgresql
  encoding: unicode
  connect_timeout:  1 # second - network handshake time
  checkout_timeout: 1 # second - connection pool checkout wait time
  variables:
    statement_timeout: 2500 # ms - maximum time for a single SQL query

production:

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### Keybase proof

I hereby claim:

  * I am rud on github.
  * I am rud (https://keybase.io/rud) on keybase.
  * I have a public key whose fingerprint is 2949 8980 F3BE 3D8F FC0B  E75D 3E50 71F8 6896 12B4

To claim this, I am signing this object:

rud

#!/bin/sh

# Simple script for pruning local branches already merged,
# and remove remote tracking branches that have been deleted

# Default to "origin" if no remote is passed
remote=${1-origin}

# Branches to keep, regardless of their current merge state
permanent_branches="develop|master|production"

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# --------------------------------------------------------
# vol as a shell script
# --------------------------------------------------------
# You would put this code in a directory that's in your
# path, like ~/bin (PATH=~/bin:$PATH in your .bashrc to
# add a directory like that to your path.)
# The invokation syntax is the same as that of the
# function.
# --------------------------------------------------------
# Example usage:

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# --------------------------------------------------------
# vol as a shell script
# --------------------------------------------------------
# You would put this code in a directory that's in your
# path, like ~/bin (PATH=~/bin:$PATH in your .bashrc to
# add a directory like that to your path.)
# The invokation syntax is the same as that of the
# function.
# --------------------------------------------------------
# Example usage: