ssimeonov

2.0.0p247 :034 > cache = ActiveSupport::Cache.lookup_store :memory_store, size: 100
 => <#ActiveSupport::Cache::MemoryStore entries=0, size=0, options={:size=>100}>
2.0.0p247 :035 > key_prefix = '*' * 50
 => "**************************************************"
2.0.0p247 :036 > cache.fetch("#{key_prefix}-1") { 0 }
 => 0
2.0.0p247 :037 > cache.fetch("#{key_prefix}-2") { 0 }
 => 0
2.0.0p247 :038 > cache
 => <#ActiveSupport::Cache::MemoryStore entries=2, size=8, options={:size=>100}>

ssimeonov

# Memory snapshot analyzer which parses the /proc file system on *nix
#
# Example (run in Heroku console):
#
#    ms = MemorySnapshot.new
#    1.upto(10000).map { |i| Array.new(i) }; nil
#    ms.snapshot!; nil
#    ms.diff 10
#    => {"lib/ld-2.11.1.so"=>156, "heap"=>2068, "all"=>2224}
#

ssimeonov

One of the side-effects of using git branching aggressively is that you end up with a lot of branches in both the local and remote repositories.

For cleaning up branches on remote git repositories I use git-sweep. To remove local branches tied to remote branches that no longer exists I run git fetch --prune. This helps a lot but it doesn't handle the issue of local branch proliferation.

git branch --contains mybranch will list the branches that contain the commits of mybranch, i.e., the branches that mybranch has been merged into. If a branch has been merged into many branches it is a good candidate for cleanup.

To get a count of the number of branches all local branches have been merged into:

for k in $(git branch | tr -d "*");do git branch --contains "$k" | wc -l | tr -d '\n\t '; echo " $k" ;done | sort -n

ssimeonov

# RSpec matcher to spec delegations.
# Forked from https://gist.github.com/txus/807456 with added bug fixes
#
# Usage:
#
#     describe Post do
#       it { should delegate(:name).to(:author).with_prefix } # post.author_name
#       it { should delegate(:month).to(:created_at) }
#       it { should delegate(:year).to(:created_at) }
#       it { should delegate(:something).to(:'@instance_var') }

ssimeonov

  app.process("web-1") do |process|
    process.start_command = "bundle exec thin start --ssl --ssl-verify --ssl-key-file web.key --ssl-cert-file web.pem -p 3000"

    process.working_dir = working_dir
    process.daemonize = true
    process.environment = env
    process.stop_signals = [:quit, 30.seconds, :term, 5.seconds, :kill]
    process.stop_grace_time = 45.seconds

    process.stdout = process.stderr = "log/web-1.log"

ssimeonov

class BluepillOverride
  def self.provider
    Class.new(Chef::Provider::BluepillService) do
      def shell_out!(*args)
        args.each do |command|
          rvm_shell "#{command}" do
            code command
          end
        end
      end

ssimeonov

#
# Cookbook Name:: rake-chef
# Recipe:: spec
#
# Copyright (C) 2013 Swoop, Inc.
# 

include_recipe 'rvm'

# rake subclasses rvm_shell LWRP

ssimeonov

class Chef
  class ResourceFactory
    class Rake
      def self.create(*args, &block)
        register
        Chef::Resource::Rake.new(*args, &block)
      end

      def self.register
        @klass ||= begin

ssimeonov

1.9.3p392 :001 > r = Redis.new
 => #<Redis client v3.0.4 for redis://127.0.0.1:6379/0>
1.9.3p392 :002 > r.set("key:5", "\xad\xad")
 => "OK"
1.9.3p392 :003 > r.get("key:5")
 => "\xAD\xAD"

ssimeonov

mkdir ~/.wireshark/plugins && cd ~/.wireshark/plugins && curl -O https://raw.github.com/jzwinck/redis-wireshark/master/redis-wireshark.lua