liaody

Here are some of the "gotchas" I've encountered when I converted all the javascript code into coffeescript. (BTW, this is gathered while coding for YourMechanic.com, a very cool mobile auto repair service.)

Disclaimer: Coffeescript is a great productivity booster for me personally. Even with all the things outlined below, it is still way better than javascript. None of these should discourage you from jumping into it right away.

Major gotchas

(Things that generate wrong code silently)

blendmaster

code = input
	.replace /\/\/.*/gm '' # remove comments
	.trim!
	.split /\s+/ # turn into lines
	.filter (it, i) -> # build symbol table and remove labels
		if it.match /\(([A-Za-z\._$:][\w\.$:]*)\)$/ # that[1] is the first capturing group
			symbols[that[1]] = i - len++ # len++ adjusts the symbol's line number to the filtered array
			return false
		true # keep actual instructions
	.map -> # parse instructions