jgn

Stuff I learned about Puppet

Chef vs Puppet

• My blink is that in 2012 Puppet is safer and more productive.
• Puppet is declarative, Chef procedural.
• Puppet brings system into compliance (state), Chef "does" things (recipes).
• Puppet has strong security practices; Chef has a toleration for loose security in Chef itself.
• Puppet makes it very hard to get "outside the lines" or violate its strong opinions; in Chef this is routine.

jgn

require 'erb'

When /\A\(erb\) (.*)\z/ do |*matches|
  s = ERB.new(matches[0]).result(binding)
  if matches.size > 1
    s = <<-MULTI
    #{s}
    """
    #{ERB.new(matches[1]).result(binding)}
    """

jgn

class CachedHash
  extend ActiveSupport::Memoizable

  def initialize(cache_key)
    @cache_key = cache_key
  end

  def [](key)
    fetch[key]
  end

jgn

class CachedSequence
  extend ActiveSupport::Memoizable

  def initialize(cache_key)
    @cache_key = cache_key
    ensure_value
  end

  def next
    Rails.cache.increment(cache_key)

jgn

#!/bin/sh

#
# Upgrade PostgreSQL from 9.0 to 9.1
#
# by David Sommers
#

brew update postgres

jgn

crickets: "hears crickets chirping"
drama: "https://123.campfirenow.com/images/drama.jpg"
greatjob: "https://123.campfirenow.com/images/greatjob.png"
live: "is DOING IT LIVE"
pushit: "https://123.campfirenow.com/images/pushit.gif"
rimshot: "plays a rimshot"
secret: "found a secret area :key:"
tada: "ta-da! :flags:"
tmyk: ":sparkles: :star: The More You Know :sparkles: :star:"
trombone: "plays a sad trombone"

jgn

Test

jgn

#!/usr/bin/env ruby

class MRISC
  def run(code)
    tokens = code.gsub(/(\*.*?\*)|[^a-z0-9,-;@\._]/,'').split(';')
    @vars,stack,i = {:_pc=>-1,:_oc=>0},[],0
    tokens.map!{|t| t.chars.first=='@' ? (@vars[t.to_sym]=i-1;nil) : (i+=1;t.split(',').map{|e|numeric?(e) ? e.to_i : e.to_sym})}.compact!
    while @vars[:_pc] < tokens.size-1
      @vars[:_pc] += 1
      @vars[:_oc] += 1

jgn

<script>
(function(){
  
  // http://webreflection.blogspot.com/2008/10/subclassing-javascript-native-string.html

  function MyString(__value__) {
    this.length = (this.__value__ = __value__ || "").length;
  };
  with(MyString.prototype = new String)
      toString = valueOf = function() { return this.__value__ };

jgn

# Force the underlying store for a Set to be an OrderedHash.
class OrderedSet < Set
  def initialize(enum = nil, &block)
    @hash ||= ActiveSupport::OrderedHash.new
    super
  end
end