Saulius Grigaliunas saulius

Instrument Anything in Rails 3

With Rails 3.0 released a few weeks ago I've migrated a few apps and I'm constantly finding useful new improvements. One such improvement is the ability to log anything in the same way that Rails internally logs ActiveRecord and ActionView. By default Rails 3 logs look slightly spiffier than those produced by Rails 2.3: (notice the second line has been cleaned up)

Started GET "/" for 127.0.0.1 at Mon Sep 06 01:07:11 -0400 2010
  Processing by HomeController#index as HTML
  User Load (0.2ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1
  CACHE (0.0ms)  SELECT `users`.* FROM `users` WHERE (`users`.`id` = 3) LIMIT 1

Rendered layouts/_nav.html.erb (363.4ms)

Back in Melbourne circa 2010/11, Jodie, Jared and I used to run a [monthly vegan mentoring group][vegan-month]. I have gone back through the mailing lists and collected much of the curriculum and information from the program into this single document, so that I can distribute it more widely. The program was designed not just to get you through the first month nutritionally, but to expose you to a variety of foods and ideas that may be new to you. It emphasises that veganism is a shift sideways, not a sacrifice.

ruby-1.9.3-p327 cumulative performance patch for rbenv

This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.

Requirements

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.

	For each Ruby module/class, we have Ruby methods on the left and the equivalent
	Clojure functions and/or relevant notes are on the right.

	For clojure functions, symbols indicate existing method definitions, in the
	clojure namespace if none is explicitly given. clojure.contrib./ functions can
	be obtained from http://github.com/kevinoneill/clojure-contrib/tree/master,
	ruby-to-clojure./ functions can be obtained from the source files in this
	gist.

	If no method symbol is given, we use the following notation:

	; Released under the Apache License, Version 2.0
	; http://www.apache.org/licenses/LICENSE-2.0.html

	(defmacro try-let
	"A combination of try and let such that exceptions thrown in the binding or
	body can be handled by catch clauses in the body, and all bindings are
	available to the catch and finally clauses. If an exception is thrown while
	evaluating a binding value, it and all subsequent binding values will be nil.

	Example:

	# NOTICE: to get Nginx+Unicorn best-practices configuration see the gist https://gist.github.com/3052776

	$ cd /usr/src
	$ wget http://nginx.org/download/nginx-1.2.1.tar.gz
	$ tar xzvf ./nginx-1.2.1.tar.gz && rm -f ./nginx-1.2.1.tar.gz

	$ wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.30.tar.gz
	$ tar xzvf pcre-8.30.tar.gz && rm -f ./pcre-8.30.tar.gz

	$ wget http://www.openssl.org/source/openssl-1.0.1c.tar.gz

	# autoload concerns
	module YourApp
	class Application < Rails::Application
	config.autoload_paths += %W(
	#{config.root}/app/controllers/concerns
	#{config.root}/app/models/concerns
	)
	end
	end

	# Simple Car class. Nothing special here...
	class Car
	attr_accessor :brand
	attr_accessor :model
	attr_accessor :year

	def initialize(brand, model, year=2011)
	@brand, @model, @year = brand, model, year
	end

	<?xml version="1.0" encoding="UTF-8" ?>
	<!DOCTYPE busconfig PUBLIC
	"-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
	"http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
	<busconfig>
	<!-- Only the root user can own the Upstart name -->
	<policy user="root">
	<allow own="com.ubuntu.Upstart" />
	</policy>

	#Model

	@user.should have(1).error_on(:username) # Checks whether there is an error in username
	@user.errors[:username].should include("can't be blank") # check for the error message

	#Rendering
	response.should render_template(:index)

	#Redirecting
	response.should redirect_to(movies_path)