dhh

class Ticket < ActiveRecord::Base
  belongs_to :grouper
  belongs_to :user

  validate :user_cant_be_blacklisted, on: :confirmation
  validate :user_cant_double_book, on: :confirmation

  validate :grouper_cant_be_full, on: :confirmation
  validate :grouper_cant_have_occurred, on: :confirmation

scy

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

• From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
• That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

guilleiguaran

defmodule ApplicationRouter do
  use Dynamo.Router

  prepare do
    # Pick which parts of the request you want to fetch
    # You can comment the line below if you don't need
    # any of them or move them to a forwarded router
    conn.fetch([:cookies, :params])
  end

jstorimer

#!/usr/bin/env ruby

require 'socket'

test_file = ARGV[0]

socket = UNIXSocket.new('testing.sock')

socket.write(test_file)
socket.close_write

willurd

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

ericbmerritt

# Copyright 2012 Erlware, LLC. All Rights Reserved.
#
# This file is provided to you under the Apache License,
# Version 2.0 (the "License"); you may not use this file
# except in compliance with the License.  You may obtain
# a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,

adamwiggins

Make it real

Ideas are cheap. Make a prototype, sketch a CLI session, draw a wireframe. Discuss around concrete examples, not hand-waving abstractions. Don't say you did something, provide a URL that proves it.

Ship it

Nothing is real until it's being used by a real user. This doesn't mean you make a prototype in the morning and blog about it in the evening. It means you find one person you believe your product will help and try to get them to use it.

Do it with style

rubiii

Savon 3.0 TL;DR

• It requires Ruby 1.9 or higher.
• It is based on the all-new Wasabi 4.0 which is the driving factor behind this version. This means, that we now require a WSDL! There's a TL;DR for Wasabi 4.0 as well and you should read it.
• HTTP caused a lot of problems and questions which this project should not have to deal with at all, so I'm replacing HTTPI with a simple adapter you can overwrite for authentication, cookies, etc. Added benefit: you can also easily swap it out in your tests.
• Thanks to the new parser, Savon can now create example requests and show you the types to use.

rpanachi

#!/bin/sh

for q in $(echo 'SMEMBERS "resque:queues"' | redis-cli | awk '{print $1}')
do
    echo $q $(echo "LLEN \"resque:queue:$q\"" | redis-cli)
done

# in a single line;
# for q in $(echo "SMEMBERS \"resque:queues\"" | redis-cli | awk '{print $1}'); do echo $(echo "LLEN \"resque:queue:$q\"" | redis-cli); done | awk '{s+=$1} END {print s}'

ryandotsmith

class RackTimer
  def initialize(app)
    @app = app
  end

  def call(env)
    start_request = Time.now
    status, headers, body = @app.call(env)
    elapsed = (Time.now - start_request) * 1000
    $stdout.puts("request-id=#{env['HTTP_HEROKU_REQUEST_ID']} measure.rack-request=#{elapsed.round}ms")