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')

yortz

#config/initializers/carrierwave.rb

CarrierWave.configure do |config|
  if Rails.env.production? or Rails.env.development?
    config.storage :cloud_files
    config.cloud_files_username = "your_username"
    config.cloud_files_api_key = "your_key"
    config.cloud_files_container = "test"
    config.cloud_files_cdn_host = "c0012345.cdnn.cloudfiles.rackspacecloud.com"
    def store_dir

erichurst

# MySQL.  Versions 4.1 and 5.0 are recommended.
#
# Install the MySQL driver:
#   gem install mysql2
#
# And be sure to use new-style password hashing:
#   http://dev.mysql.com/doc/refman/5.0/en/old-client.html
development:
  adapter: mysql2
  encoding: utf8

redrick

(Operating system is Fedora 2.6.40.6-0.fc15.i686)
Hi there quiet recently I had a big problem with this guy - gem install pg

It threw me :

$ gem install pg
Building native extensions.  This could take a while...
ERROR:  Error installing pg:
	ERROR: Failed to build gem native extension.

taylor

#!/usr/bin/env ruby
# encoding: UTF-8

require 'rubygems'
begin
require 'bundler/setup'
rescue LoadError
end
require 'digest/sha1'
require 'openssl'

aaronzirbes

If you see...

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
    /usr/local/lib/libmacfuse_i32.2.dylib    /usr/local/lib/libmacfuse_i64.2.dylib    /usr/local/lib/libosxfuse_i32.2.dylib    /usr/local/lib/libosxfuse_i64.2.dylib
Warning: Unbrewed .la files were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when

ryanb

My issues with Modules

In researching topics for RailsCasts I often read code in Rails and other gems. This is a great exercise to do. Not only will you pick up some coding tips, but it can help you better understand what makes code readable.

A common practice to organize code in gems is to divide it into modules. When this is done extensively I find it becomes very difficult to read. Before I explain further, a quick detour on instance_eval.

You can find instance_eval used in many DSLs: from routes to state machines. Here's an example from Thinking Sphinx.

class Article < ActiveRecord::Base

return1

# install dependencies
sudo apt-get install libcurl4-openssl-dev libncurses5-dev pkg-config automake yasm

# clone cpuminer
git clone https://github.com/pooler/cpuminer.git

# compile
cd cpuminer
./autogen.sh
./configure CFLAGS="-O3"

Austio

1. Open a command prompt and navigate to /etc/nginx/ssl

2. Issue "openssl req -new -newkey rsa:2048 -nodes -keyout server.key -out server.csr" 

3. Get your certificate issued - Go to your certificate authority and give them the CSR (server.csr)

4. Copy your new crt (that the certificate authority issued) to the /etc/nginx/ssl and give it read priveledges

5. Reconfigure your nginx.conf, here is mine.  The first part redirects 80 to 443, the second part listens to 443 and is optimized to return Ruby on Rails application requests using gzip and unicorn.  

chanks

Turning PostgreSQL into a queue serving 10,000 jobs per second

RDBMS-based job queues have been criticized recently for being unable to handle heavy loads. And they deserve it, to some extent, because the queries used to safely lock a job have been pretty hairy. SELECT FOR UPDATE followed by an UPDATE works fine at first, but then you add more workers, and each is trying to SELECT FOR UPDATE the same row (and maybe throwing NOWAIT in there, then catching the errors and retrying), and things slow down.

On top of that, they have to actually update the row to mark it as locked, so the rest of your workers are sitting there waiting while one of them propagates its lock to disk (and the disks of however many servers you're replicating to). QueueClassic got some mileage out of the novel idea of randomly picking a row near the front of the queue to lock, but I can't still seem to get more than an an extra few hundred jobs per second out of it under heavy load.

So, many developers have started going straight t