slevithan/xregexp — pull request #43 by KylePDavis (2012-09-19 15:10:17+00:00)
Title: Added XRegExp.join() which joins an Array with the given separator in… 

...a single XRegExp

Split the majority of XRegExp.union into a private prepareJoin() helper.
Added XRegExp.join() which joins an Array with the given separator into
a single XRegExp.
Updated XRegExp.union() to use new XRegExp.join() internally.
Rebuilt the xregexp-all.js file.