lukesutton

Warden::Manager.serialize_into_session{|user| user.id }
Warden::Manager.serialize_from_session{|id| User.get(id) }
 
Warden::Manager.before_failure do |env,opts|
  # Sinatra is very sensitive to the request method
  # since authentication could fail on any type of method, we need
  # to set it for the failure app so it is routed to the correct block
  env['REQUEST_METHOD'] = "POST"
end
 

igrigorik

require 'rubygems'
require 'rack'

class Object
  def webapp
    class << self
       define_method :call do |env|
         func, *attrs = env['PATH_INFO'].split('/').reject(&:empty?)
         [200, {}, send(func, *attrs)]
       end

dansimau

#
# "<cmd>" <retry times> <retry wait>
#
do_retry()
{
	cmd="$1"
	retry_times=$2
	retry_wait=$3

	c=0

c4milo

# Ubuntu upstart file at /etc/init/yourservice.conf

pre-start script
    mkdir -p /var/log/yourcompany/
end script

respawn
respawn limit 15 5

start on runlevel [2345]

un33k

FILE SPACING:

 # double space a file
 sed G

 # double space a file which already has blank lines in it. Output file
 # should contain no more than one blank line between lines of text.
 sed '/^$/d;G'

canton7

How to have local versions of tracked config files in git

This is a fairly common question, and there isn't a One True Answer.

These are the most common techniques:

If you can modify your application

yurial

fix:
/usr/libexec/git-core/git-rebase--interactive

-git rev-list $merges_option --pretty=oneline --abbrev-commit\
+git rev-list $merges_option --pretty=">%h (%an <%ae>) %s"\

result:
  1 pick 19f43c1 (Yuri Dyachenko <yurial@gplvote.org>) add: gcrypt::noerr
  2 pick 990a7e8 (Yuri Dyachenko <yurial@gplvote.org>) add: gcrypt::throwif( err ) throw if err != noerr
  3 pick cb03f3b (Yuri Dyachenko <yurial@gplvote.org>) add: ext::move<T> move semantic

zcoder

--- git-rebase--interactive.old 2011-06-11 13:17:48.000000000 +0400
+++ git-rebase--interactive     2012-04-17 12:44:09.000000000 +0400
@@ -951,7 +951,7 @@
                        REVISIONS=$ONTO...$HEAD
                        SHORTREVISIONS=$SHORTHEAD
                fi
-               git rev-list $MERGES_OPTION --pretty=oneline --abbrev-commit \
+               git rev-list $merges_option --pretty=">%h (%an <%ae>) %s"\
                        --abbrev=7 --reverse --left-right --topo-order \
                        $REVISIONS | \

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

danielevans

class Medium < ActiveRecord::Base
  serialize :payload, JSON
end