Dan Choi danchoi

Node.js and frameworks

Everyone has heard, “if all you have is a hammer, everything looks like a nail”. It’s an old adage that almost feels like cheap, dime store philosophy; especially in an echo chamber like Twitter where everything is a sound bite. But the cautionary tale it’s so famous for is profound and important to appreciate in the abstract world of software engineering.

Node.js by design is a very sparse platform. It’s primary purpose is to bind javascript to some parts of the operating system. It’s largely doctrine agnostic. And ultimately, users are left wondering where to start when they write a program.

Its not a nail

You first need to consider the scope of Node.js. It's much larger than that of a Web Server. Remember, it was made for easily building fast, scalable network applications. And Web Servers are a subset of network applications. Developers are coming from platforms where they spent almost 100% their time inside a Web Server. They want a nail, we can give them that. [

Setting up and installing rbenv, ruby-build, rubies, rbenv-gemset, and bundler

This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.

TL;DR Demo

# Ensure system is in ship-shape.

aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev

	class ErbEngine < Haml::Engine
	def push_script(text, preserve_script, in_tag = false, preserve_tag = false,
	escape_html = false, nuke_inner_whitespace = false)
	push_text "<%= #{text.strip} %>"
	end

	def push_silent(text, can_suppress = false)
	push_text "<% #{text.strip} %>"
	end
	end

	# Deploying a Sinatra app to Heroku

	## Database
	The location of the database Heroku provides can be found in the environment
	variable DATABASE_URL. Check the configure-block of toodeloo.rb for an example
	on how to use this.

	## Server
	Heroku is serving your apps with thin, with means you have all your thin goodness available,
	such as EventMachine.

	framework 'cocoa'

	outpipe = NSPipe.pipe

	task = NSTask.alloc.init
	task.setLaunchPath '/usr/bin/tail'
	task.setArguments %w(-f -n10 /Users/jch/projects/pharmmd/log/wendy.log)
	task.setStandardOutput outpipe

	file = outpipe.fileHandleForReading

	#!/bin/bash

	# Shows the weather forecast for Boston, MA
	curl -s 'http://weather.noaa.gov/pub/data/forecasts/state/ma/maz007.txt' \|
	sed -n '/^TAB/,+11p; /BOSTON/,+3p'

	<!-- A scaffolded edit view converted to mustache -->

	<h1>Editing post</h1>

	{{#form}}
	{{#errors?}}
	<div id="error_explanation">
	<h2>{{error_header}}</h2>
	</div>
	<ul>

	{-# LANGUAGE OverloadedStrings, DeriveDataTypeable, NoMonomorphismRestriction #-}

	module AesonTest where

	import qualified Data.Aeson.Generic as A
	import qualified Data.ByteString.Lazy as L8
	import Data.Data
	import Data.Typeable
	import Codec.Binary.UTF8.String as U8
	import Data.Maybe

	{-# LANGUAGE OverloadedStrings #-}
	import Data.Char (isPunctuation, isSpace)
	import Data.Monoid (mappend)
	import Data.Text (Text)
	import Control.Exception (fromException)
	import Control.Monad (forM_)
	import Control.Concurrent (MVar, newMVar, modifyMVar_, readMVar)
	import Control.Monad.IO.Class (liftIO)
	import qualified Data.Text as T
	import qualified Data.Text.IO as T