jashkenas/coffee-script — pull request #1785 by revence27 (2011-10-21 09:35:54+00:00)
Title: Binary Literals

Support for binary literals (where, say, 0b100 is like 0x04, as is the case in Ruby, Python, and in a different way Erlang).
Implements issue jashkenas/coffee-script#1780 non-invasively (which I believe @jashkenas will like) with a single test case, which basically just checks that binary literals are understood as would be integers. And it passes.