side by side comparison

CoffeeScript	Coco
last = (a) -> a[a.length-1]	last = -> it[*-1]
class equals constructor: (x, y) -> return `x == y`	function equals @@0 == @@1
$('.account') .addClass('active') .show 'slow'	$ \.account .addClass \active .show \slow
pythagoras = [] for a in [9..1] for b in [a...99] by 1 h = (a*a + b*b) ** 0.5 pythagoras.push [a, b, h] unless h % 1	pythagoras = for a from 9 to 1 by -1 for b from a til 99 h = (a*a + b*b) ** 0.5 [a, b, h] unless h % 1
for file, index in ['head', 'body', 'tail'] do (file, index, time = new Date) => fs.readFile file, (err, contents) => @compile file, index, contents, time	for let file, index of <[head body tail]> let time = new Date err, contents <~ fs.readFile file @compile file, index, contents, time
mixin = (objects...) -> for obj in objects @[key] = val for own key, val of obj this	mixin = (...objects) -> for objects => @ <<< & this
loop node = node.parentNode break unless node instanceof Element or node instanceof Elephant	do node.=parentNode while node instanceof [Element, Elephant]
alert( try nonexistent / undefined catch error "And the error is ... #{error}" )	alert do try nonexistent / void catch "And the error is ... #e"
exports.Cat = class Cat extends Animal constructor: (@name) -> super @meowed = 0 @interval: 5000 meow: => ++@meowed play: -> setInterval @meow, @constructor.interval bark: -> throw Error 'unimplemented'	export class Cat extends Animal (@name) -> super ... @meowed = 0 @meow = ~> ++@meowed @interval = 5000ms play: -> setInterval @meow, ..interval bark: -> ...
switch day when "Fri", "Sat" if day isnt rainy go bingo go dancing when "Sun" then go church else go work	switch day case \Fri \Sat if day is not rainy go bingo go dancing case \Sun then go church default go work
(-> if match = /\d+/.exec location.hash @value = match[0] @focus() else @disabled = yes ).call document.getElementById 'page'	let this = document.getElementById \page if /\d+/exec location.hash @value = that.0 @focus! else @disabled = true
### * Released under the MIT License ###	/* * Released under the MIT License */
RegExp ///he (re){1,2} gex///.source, flag	//he (re){1,2} gex #flag//?
dicts = [ I2: [ [1, 0] [0, 1] ] , 'baz qux': 2 ] assert dicts[1]['baz qux'] is 2	dicts = * I2: * 1 0 * 0 1 * 'baz qux': 2 assert dicts.1.'baz qux' is 2
child = new class extends prototype: parent child.x = 6 child.y = 9	child = ^parent <<< x: 6, y: 9
options = {} options[k] = v for own k, v of defaults options[key] = value run options	run {...defaults, (key): value}
x = !x	!=x
Array(-~num).join(str).replace /\D+/g, ''	"#str" * num - /\D+/g
biggest = if a > b then a else b	biggest = a >? b
pages = (com.github ||= {}).satyr ||= []	pages = com@github@@satyr
options = collapsible: true, active: false	options = {+collapsible, -active}
rotate = (point) -> if 0 of point then [point[2], point[0], point[1]] else x: point.z, y: point.x, z: point.y	rotate = (point) -> if 0 in point then point[2 0 1] else point{x: z, y: x, z: y}
(String.fromCharCode i for i in [65..90])	[\A to \Z]