Prefixing list comprehensions with "then"

gistfile1.coffee

# This form doesn't work
a = num for num in [0..364]
alert(a.join(","))

# This form works
a = (num for num in [0..364])
alert(a.join(","))

# This form also works
a = then num for num in [0..364]
alert(a.join(","))

a = for num in [0..364]
alert(a.join(","))

http://coffeescript.org/#loops recommends: https://gist.github.com/Maciek416/5541286#file-gistfile1-coffee-L5

but corban's is pretty damn slick.