Bridging

The GAP

I’m Darcy.

@sutto

github.com/Sutto

sutto@sutto.net

Filter Squadhttp://github.com/filtersquad

http://github.com/youthtree

cat ./README

• A brief History of JavaScript

• {Ruby,Rails} + JS Love

• Building Cool Stuff with ExecJS

Most Importantly,

Becoming a Better Ruby

Developer With

JavaScript

A short History of JavaScript

Act 1

Created by Brendan Eich

in 1995 at Netscape

Prototype Based

Dynamic & Weak Typing

Functions are First Class

~1996 until ~2004

The Browser Wars &

The DHTML Years

~2004 until ~2008

AJAX and Web 2.0

~2008 to Now

HTML5 & The Return

to the Server Side

0.1.0 Released Late 2009

Server Side JS isn’t New.

1996: NetScape LiveWire

1997: Rhino created

1997: JScript via ASP

2000: JScript.NET

2005: Helma released

2007: AppJet Launched

2008: Aptana Jaxer hits 1.0

2009: Node.JS Released

JavaScript and I

Act 2

Mid 2008:

I started writing an IRC Bot

Bright Idea:

JavaScript Plugins

Client in Ruby,

Plugins in JavaScript

Early 2010:

I discovered CoffeeScript

“Simple, transparent CoffeeScript support

for Rails and Rack Apps”.

The Gap

Act 3

Ruby JavaScript

Ruby JavaScript

Ruby JavaScriptBridgingThe Gap

Client Side

Act 4

RJS

Red + RedShifthttps://github.com/jessesielaff/red/

HotRubyhttp://hotruby.yukoba.jp/

RKellyhttp://bit.ly/9nLw4R

Unobtrusive RJS(Rails >= 3.0),

e.g. https://github.com/rails/jquery-ujs

CoffeeScript

http://lesscss.org/

Rails 3.1 Asset Pipeline

HandleBar / Mustache

Same template Code on Client & Server

Server Side

Act 5

gem install coffee-script

0.1.0 until 0.3.2

Ruby-based Compiler

Barista + BistroCar

Call Library via Node

Gem Version ~> 1.0

Uses the gem ‘node’

Gem Version <= 2.2, >= 2.0

Built in Engines Approach

Gem Version ~> 2.2

Uses ExecJS instead

Baristahttps://github.com/sutto/barista/

ExecJShttps://github.com/sstephenson/execjs

therubyracer

therubyrhino

johnson

mustang

Apple JavaScript Core (JSC)

Mozilla Spidermonkey

Microsoft Windows Script Host

Node.js

Uses first available RunTime

Uglifierhttps://github.com/lautis/uglifier

Rails 3.1 Asset Pipeline

Building Stuff with ExecJS

RedJShttps://github.com/cowboyd/redjs

“Rspecs for a Ruby interface to javascript.”

Embedding vs.

Just Running Code

More Traditional Approaches

Juggernaut 2https://github.com/maccman/juggernaut

Ruby / Other Languages

Redis PubSub

Node.JS Server

Browser

Ruby / Other Languages

Redis PubSub

Node.JS Server

Browser

Ruby / Other Languages

Redis PubSub

Node.JS Server

Browser

Ruby / Other Languages

Redis PubSub

Node.JS Server

Browser

See Also: ZeroMQ

Conclusion

Thanks!

Questions?