fent/randexp.js — pull request #13 by dtudury (2014-09-15 23:45:00+00:00)
Title: deal with regex sets as combinable sets of numeric ranges

so this one is a bit experimental... it's much faster than my other pull request and the tests mostly pass

**new class**: I made a class that's a set of ranges that allows for easy addition and subtraction of ranges. there's no tests for it and if I wanted to publish it I'd add a few more features to it. but the new class makes inverted sets pretty simple.

**test**: there was a test to make sure the output of anyRandCharacter is returned by `/./`, but the new code doesn't use anyRandCharacter for that anymore ***so it failed***. I couldn't find any other reference to anyRandCharacter so I removed it