zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

tdd

# Put this in your ~/.gitconfig or ~/.config/git/config
# Windows users: "~" is your profile's home directory, e.g. C:\Users\<YourName>
[user]
  name = Your Full Name
  email = your@email.tld
[color]
  # Enable colors in color-supporting terminals
  ui = auto
[alias]
  # List available aliases

resistorsoftware

require 'rubygems'
require 'mechanize'
BASE = 'http://manure.myshopify.com/admin'
LOGIN = '/auth/login'
USER = 'paddy@cow.com'
PWD = 'moo-moo'
agent = Mechanize.new
page = agent.get(BASE+LOGIN)
form = page.forms.first
form.login = USER

xlson

Object.metaClass.partition = { partitionSize ->
  def result = delegate.inject([[]]) { partitioned, it ->
    if(partitioned.last().size() == partitionSize) { 
      partitioned << [it]
    } else { 
      partitioned.last() << it
    }
    partitioned
  }
  result?.last().size() == 0 ? [] : result

zumbojo

# Simple bijective function
#   Basically encodes any integer into a base(n) string,
#     where n is ALPHABET.length.
#   Based on pseudocode from http://stackoverflow.com/questions/742013/how-to-code-a-url-shortener/742047#742047

ALPHABET =
  "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".split(//)
  # make your own alphabet using:
  # (('a'..'z').to_a + ('A'..'Z').to_a + (0..9).to_a).shuffle.join

danielgwood

// A bunch of functions you can use in the MongoDB shell
// taken from http://api.mongodb.org/js/1.8.2/index.html
// amongst other sources

// Used in place of print() to view the contents of objects
printjson(x);
printjsononeline(x);

// File system interaction
ls(...);

dalethedeveloper

#Mobile Device Detection via User Agent RegEx

Yes, it is nearly 2012 and this exercise has been done to death in every imaginable language. For my own purposes I needed to get the majority of non-desktop devices on to a trimmed down, mobile optimized version of a site. I decided to try and chase down an up-to-date RegEx of the simplest thing that could possibly work.

I arrived at my current solution after analyzing 12 months of traffic over 30+ US based entertainment properties (5.8M+ visitors) from Jan - Dec 2011.

The numbers solidified my thoughts on the irrelevancy of including browsers/OSes such as Nokia, Samsung, Maemo, Symbian, Ipaq, Avant, Zino, Bolt, Iris, etc. The brass tacks of the matter is that you certainly could support these obscure beasts, but are you really going to test your site on them? Heck, could you even find one?! Unless the folks that pay you are die hard Treo users my guess is "No".

Interestingly enough my research shows that /Mobile/ is more efficient than **/iP(

potatosalad

# /etc/init/project-web-reload.conf

pre-start script
  initctl restart project-web
  sleep 15
end script

exec /usr/local/rvm/bin/default_bluepill restart

RedBeard0531

// derived from http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Parallel_algorithm

function map() {
    emit(1, // Or put a GROUP BY key here
         {sum: this.value, // the field you want stats for
          min: this.value,
          max: this.value,
          count:1,
          diff: 0, // M2,n:  sum((val-mean)^2)
    });

ruckus

WAL-E needs to be installed on all machines, masters and slaves.

How to install WAL-E

Only one machine, the master, writes WAL segments via continuous archiving. The configuration for the master postgresql.conf is:

archive_mode = on
archive_command = 'envdir /etc/wal-e.d/env wal-e wal-push %p'
archive_timeout = 60