Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
CoffeeScript - Spartan Javascript
Search
Nick Quaranto
January 16, 2013
Programming
0
590
CoffeeScript - Spartan Javascript
Going over the basics of CoffeeScript. Given at BarCampRochester and BuffaloJS.
Nick Quaranto
January 16, 2013
Tweet
Share
More Decks by Nick Quaranto
See All by Nick Quaranto
The GraphQL Way: A new path for JSON APIs
qrush
287
20k
Awesome Extractions Done Quick
qrush
1
550
rubygems.next
qrush
5
500
how to find GIFs
qrush
10
560
RubyMotion: The sleeper has awakened!
qrush
5
910
Basecamp Next: Code Spelunking
qrush
62
9.1k
m: a better Ruby Test::Unit runner
qrush
2
590
Test Driven Development
qrush
14
1.5k
Lapidary: The Art of Gemcutting
qrush
2
560
Other Decks in Programming
See All in Programming
どの様にAIエージェントと 協業すべきだったのか?
takefumiyoshii
2
610
ネイティブ製ガントチャートUIを作って学ぶUICollectionViewLayoutの威力
jrsaruo
0
130
Le côté obscur des IA génératives
pascallemerrer
0
130
育てるアーキテクチャ:戦い抜くPythonマイクロサービスの設計と進化戦略
fujidomoe
1
150
明日から始めるリファクタリング
ryounasso
0
120
プログラマのための作曲入門
cheebow
0
540
2分台で1500examples完走!爆速CIを支える環境構築術 - Kaigi on Rails 2025
falcon8823
3
3.3k
アメ車でサンノゼを走ってきたよ!
s_shimotori
0
140
Serena MCPのすすめ
wadakatu
4
900
タスクの特性や不確実性に応じた最適な作業スタイルの選択(ペアプロ・モブプロ・ソロプロ)と実践 / Optimal Work Style Selection: Pair, Mob, or Solo Programming.
honyanya
3
140
フロントエンド開発に役立つクライアントプログラム共通のノウハウ / Universal client-side programming best practices for frontend development
nrslib
7
3.9k
階層構造を表現するデータ構造とリファクタリング 〜1年で10倍成長したプロダクトの変化と課題〜
yuhisatoxxx
3
920
Featured
See All Featured
How To Stay Up To Date on Web Technology
chriscoyier
791
250k
How to train your dragon (web standard)
notwaldorf
96
6.3k
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
45
2.5k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
36
2.5k
Build The Right Thing And Hit Your Dates
maggiecrowley
37
2.9k
The Pragmatic Product Professional
lauravandoore
36
6.9k
A designer walks into a library…
pauljervisheath
209
24k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
12
1.2k
A Modern Web Designer's Workflow
chriscoyier
697
190k
Art, The Web, and Tiny UX
lynnandtonic
303
21k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
23
1.5k
Transcript
R R CoffeeScript @qrush BarCampRoc Apr 2013 Spartan JavaScript
None
JavaScript as a language is Not Verbose
Good JS is OO
Good JS is Concise
CoffeeScript is “Just JS”
CoffeeScript writes Good JS
CoffeeScript is Spartan!
a new battle! http://www.flickr.com/photos/pshab/1578426589/
the closest I’ve felt to the power I had 20
years ago in Smalltalk ~Ward Cunningham
it was the first time I experienced language envy ~DHH
I use both ~Brendan Eich
function foo() { }
function foo() func foo() function foo( function foo() func foo()
function foo( function foo() func foo() function foo( function foo() func
function foo() func foo() function foo( function foo() func foo()
function foo( function foo() func foo() function foo( function foo() func
this
this
foo = function() { return 1 + 1; }
foo = () -> 1 + 1
bar = function(x) { return x + 1; }
bar = (x) -> x + 1
_.bind(fn, obj) http://underscorejs.org/#bind http://coffeescript.org#fat_arrow
baz = () => this.foo()
foz = () => @foo()
$ -> new ItemsRouter() Backbone.history.start()
$ -> new ItemsRouter() Backbone.history.start()
more features
indents are scope
last statements implicitly return
all vars local by default
easier object syntax
title: "Sparta!" author: name: "Leonidas" handle: "theking" apples: 1
string interpolation
var html = "<option value='" + this.id + "'>" +
this.get("title") + "</option>";
"<option value='#{@id}'> #{@get("title")}</option>"
"<option value='#{@id}'> #{@get("title")}</option>"
inheritance actually works
class Item extends Backbone.Model url: -> "/events/#{@id}"
loops are less painful
None
nums = [4, 5, 6] for i in nums console.log
i 4 5 6
comprehensions compact code
nums = [1, 2, 3] [ 1, 2, 3 ]
sq = (n * n for n in nums) [ 1, 4, 9 ]
nums = [1, 2, 3] [ 1, 2, 3 ]
sq = (n * n for n in nums) [ 1, 4, 9 ]
conditionals and loops can be inline
console.log("Sparta!") if true Sparta! console.log("Persia!") unless false Sparta!
x = 6 6 x += 1 while x <
10 [ 7, 8, 9, 10 ] x 10
get existential
spear? false spear = -> "Throw!" [Function] spear? true
window.bcx ?= {} {}
startWaiting: -> @waitTimeout ?= setTimeout => @$container.addClass "waiting" , 300
stopWaiting: -> if @waitTimeout? clearTimeout @waitTimeout @waitTimeout = null @$container.removeClass "waiting"
meet your enemies
None
making coffee • Rails: http://guides.rubyonrails.org/ asset_pipeline.html • Jekyll & Rake:
https://gist.github.com/4496420 • Node: npm install coffee • Anything else: Less.app http://incident57.com/less/
debugging is not terrible
http://alexspeller.com/
some silly keywords
yes, true, on no, false, off
more info • http://coffeescript.org • http://coffeescript.codeschool.com/ • http://robots.thoughtbot.com/post/ 9251081564/coffeescript-spartan- javascript