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David Heinemeier Hansson dhh

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View GitHub Profile
View gist:8738842
Hi David
I'm impressed with your back ground and your responsibilities at 37signals. When researching your profile I also found that you have 4.8K followers and have been starred 29 times on GitHub. This speaks volumes to your work and your high technical expertise. I'd love the opportunity to speak with you about a Ruby Engineering role I'm currently working on for Heroku. I'd like to share more details about the position and find out if you or anyone you know would be interested.
Heroku is a Platform as a Service (PaaS) that lets you deploy, run and manage applications written in Ruby, Node.js, Java, Python, Clojure and Scala. Heroku is owned by Salesforce however, we operate as a completely separate entity. This allows us to maintain our technology, culture and the formula that has made us so successful.
Anyway, it would be great to set up sometime to chat. I am more than happy to answer any questions that you might have and it would be great for me to hear about what you are looking for in any potentia
View GridCountsQuery.rb
class Customers::GridCountsController < ApplicationController
def index
render json:[:grid_counts])
class GridCountsQuery
class << self
def run
query.each_with_object( do |row, grid|
View user_authentications_controller.rb
class UserAuthenticationsController < AuthenticatedController
def create
if authenticate
redirect_to return_path
redirect_to back_path, error: authentication_error_message
View gist:30007
def root(*args)
if defined?(RAILS_ROOT)
args.compact.empty? ? RAILS_ROOT : File.join(RAILS_ROOT, args)
View gist:30422
# git-create-remote-branch <branch_name>
if [ $# -ne 1 ]; then
echo 1>&2 Usage: $0 branch_name
exit 127
set branch_name = $1
git push origin origin:refs/heads/${branch_name}
View gist:37152
class Poller < Rails::Metal
def process(env)
if env["PATH_INFO"] =~ /^\/poller_rack/
return [200, {"Content-Type" => "text/html"}, ["Hello, World!"]]
# Implementation:
View gist:38672
case request.format
when :html then render
when :js then render
else head(:not_supported)
# vs
respond_to do |format|
View gist:268983
$ ruby ~/Code/rails/railties/bin/rails wonky --edge
create README
create .gitignore
create Rakefile
create Gemfile
create app
create app/controllers/application_controller.rb
create app/helpers/application_helper.rb
View gist:281420
class Notifier < ActionMailer::Base
delivers_from ''
def welcome(user)
@user = user # available to the view
mail(:subject => 'Welcome!', :to => user.email_address)
# auto renders both welcome.text.erb and welcome.html.erb
def goodbye(user)
View gist:734779
Dec 9 14:27:03 acc-db-01 [248740.420900] divide error: 0000 [#1] SMP
Dec 9 14:27:03 acc-db-01 [248740.428791] last sysfs file: /sys/devices/system/cpu/cpu15/cache/index2/shared_cpu_map
Dec 9 14:27:03 acc-db-01 [248740.444194] CPU 6
Dec 9 14:27:03 acc-db-01 [248740.450660] Modules linked in: btrfs zlib_deflate crc32c libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs reiserfs xfs exportfs nfs lockd nfs_acl auth_rpcgss sunrpc ipmi_devintf ipmi_si ipmi_msghandler autofs4 bonding fbcon tileblit font bitblit softcursor vga16fb vgastate bnx2 psmouse dell_wmi serio_raw joydev power_meter dcdbas lp parport ses enclosure usbhid hid megaraid_sas
Dec 9 14:27:03 acc-db-01 [248740.516499] Pid: 17864, comm: dsm_sa_snmp32d Not tainted 2.6.32-22-generic #33-Ubuntu PowerEdge R710
Dec 9 14:27:03 acc-db-01 [248740.538698] RIP: 0010:[<ffffffff8105621c>] [<ffffffff8105621c>] find_busiest_group+0x63c/0x900
Dec 9 14:27:03 acc-db-01 [248740.561223] RSP: 0018:ffff880604711b88 EFLAGS: 00010046
Dec 9 14:27:03 acc-
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