side by side comparison

CoffeeScript	Coco
square = (x) -> x * x `function cube(x){ return x * square(x) }`	square = -> it * it function cube x x * square x
$('.account').slice(1, -1) .addClass('active') .show 'slow'	$ .account .slice 1, -1 .addClass \active .show \slow
pythagorases = [] for a in [9..1] for b in [a...99] h = Math.sqrt aa + bb pythagorases.push [a, b, h] unless h % 1	pythagorases = for a from 9 to 1 by -1 for b from a til 99 h = Math.sqrt aa + bb [a, b, h] unless h % 1
mixin = (objects...) -> for obj in objects @[key] = val for own key, val of obj this	mixin = (...objects) -> import obj for obj of objects this
for filename, index in ['head', 'body', 'tail'] do (filename, index) => fs.readFile filename, (err, contents) => @compile filename, index, contents.toString()	for filename, index of <[ head body tail ]> let err, contents <~ fs.readFile filename @compile filename, index, contents.toString()
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 meow: => ++@meowed bark: -> throw Error 'unimplemented' play: -> setInterval @meow, 5000	class exports.Cat extends Animal (@name) -> super ... @meowed = 0 @meow = ~> ++@meowed bark: -> ... play: -> setInterval @meow, 5000ms
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
Released under the MIT License	/* Released under the MIT License */
RegExp /// he (re){1,2} gex ///.source, flag	// he (re){1,2} gex #flag //?
I2 = [ [1, 0] [0, 1] ] dicts = [ foo: 0 bar: 1 , 'baz qux': 2 ] assert dicts[1]['baz qux'] is 2	I2 = 1 0 0 1 dicts = foo: 0 bar: 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 in defaults options[key] = value run options	run {...defaults, (key): value}
Array(-~num).join str	"#str" * num