tyre/curriculum — comment on commit 82f915cf215daae6e624684f6831da730782492e
File:  line 0
By mattyoho:

Thanks for the pull request, but we're actually explicitly deferring regular expressions until later in this case. We're also interested in emphasizing basic Ruby string manipulation here. We'll have a similar exercise that revisits these concepts and shows how much easier this type of problem can be solved with regular expressions.

I know, it's certainly tempting to put them in now. :-)