Girish Duvuru girish

Render and Redirect

The normal controller/view flow is to display a view template corresponding to the current controller action, but sometimes we want to change that. We use render in a controller when we want to respond within the current request, and redirect_to when we want to spawn a new request.

Render

The render method is very overloaded in Rails. Most developers encounter it within the view template, using render :partial => 'form' or render @post.comments, but here we'll focus on usage within the controller.

`:action`

Railties 3.1 RC4

The new rake task assets:clean removes precompiled assets. [fxn]
Application and plugin generation run bundle install unless --skip-gemfile or --skip-bundle. [fxn]
Fixed database tasks for jdbc* adapters #jruby [Rashmi Yadav]
Template generation for jdbcpostgresql #jruby [Vishnu Atrai]

Screencasting Framework

The following document is a written account of the Code School screencasting framework. It should be used as a reference of the accompanying screencast on the topic.

Why you should care about screencasting?

You're probably aren't going to take the time to read this screencast if you're not interested, but there are a lot of nice side effects caused by learning how to create quality screencasts.

Communicating more effectively - At Envy Labs we produce screencasts for our clients all the time. Whether it's demoing a new feature or for a presentation for an invester, they're often much more effective and pleasent then a phone call or screen sharing.

	#!/bin/sh
	# Usage: . testlib.sh
	# Simple shell command language test library.
	#
	# Tests must follow the basic form:
	#
	# begin_test "the thing"
	# (
	# echo "hello"
	# false

	def tip(msg); puts; puts msg; puts "-"*100; end

	#
	# 30 Ruby 1.9 Tips, Tricks & Features:
	# http://www.igvita.com/2011/02/03/new-ruby-19-features-tips-tricks/
	#

	tip "Upgrading to Ruby 1.9 is simple: rvm install 1.9.2 && rvm --default 1.9.2"

	tip "Ruby 1.9 supports named captures in regular expressions!"

	import com.twitter.scalding._

	class DijkstraJob(args: Args) extends Job(args) {
	val iteration = args.getOrElse("iteration", "0").toInt

	Tsv(args("input"), ('node, 'dist, 'adjacent))
	.read
	.flatMap(('node, 'dist, 'adjacent) -> ('node, 'dist, 'adjacent)) { p: (String, Int, String) =>
	val (node, distance, adjacent) = p
	(node, distance, adjacent) +: adjacent.split(":").map { part: String =>

	/*
	* Copyright (c) 2007-2012 Concurrent, Inc. All Rights Reserved.
	*
	* Project and contact information: http://www.concurrentinc.com/
	*/

	package simple5;

	import java.util.Properties;

	# unicorn_rails -c /data/github/current/config/unicorn.rb -E production -D

	rails_env = ENV['RAILS_ENV'] \|\| 'production'

	# 16 workers and 1 master
	worker_processes (rails_env == 'production' ? 16 : 4)

	# Load rails+github.git into the master before forking workers
	# for super-fast worker spawn times
	preload_app true

	require 'zmq'
	context = ZMQ::Context.new
	pub = context.socket ZMQ::PUB
	pub.setsockopt ZMQ::IDENTITY, 'ping-pinger'
	pub.bind 'tcp://*:5555'

	i=0
	loop do
	pub.send "ping pinger #{i+=1}" ; sleep 1
	end

	latin = "a"
	arabic = [0xfeb6].pack('U') # Sheen, ش
	cjk = [0x3333].pack('U') # HUIITO, ㌳

	kcodes = [ 'NONE', 'u', 's' ]
	chars = [latin, arabic, cjk]
	patterns = [ /\w/, /\W/, /[[:punct:]]/ ]

	kcodes.each do \|kcode\|
	$KCODE = kcode