node.js Taiwan

2012/03/16

CoffeeScript

• JavaScript: The Good Parts:

• “JavaScript是披了C的衣服的Lisp”

• CoffeeScript讓JS寫起來更簡潔

Foreach

• JavaScript (ES5) 有forEach

• Underscore.js 有 each / forEach ，效果完全相同

• 簡單安全

Foreach

var array = [1, 2, 3]

for (var i = 0; i <= array.length; i++) {

var item = array[i];

alert(item);

}

JS for loop

Oops.

Foreach (coffee)

for num in [1, 2, 3]

alert num

Foreach (js)

_.each([1, 2, 3], function(num){ alert(num); });

underscore.js

_.each([1, 2, 3], alert);

效果也相同

[1, 2, 3].forEach(alert);

Array.prototype.forEach (ES5)

ES5-shim

• 古早瀏覽器的救星

• https://github.com/kriskowal/es5-shim

• 延伸閱讀

• http://www.modernizr.com/

Variable Scope (coffee)

sys = require 'sys'

foo = 42

(() -> foo = 43)()

sys.puts foo # 43

sys = require 'sys‘

my = (local) -> local()

foo = 42

my (foo) -> foo = 43

sys.puts foo # 42

https://github.com/jashkenas/coffee-script/issues/712

Form middleware

• https://github.com/guileen/node-iform

• Express寫起來會更簡潔

CoffeeScript in the Wild

• Hubot by GitHub

• http://hubot.github.com/

• Spine (client-side MVC)

• http://spinejs.com/

Node.js 台灣社群協作電子書

• http://book.nodejs.tw/

• https://github.com/nodejs-tw/nodejs-wiki-book

• 製作自己的電子書！

• http://contpub.org/read/nodejs-wiki-book

• reStructuredText

• http://docutils.sourceforge.net/rst.html