JD KF wrote in post #1088118:
> On a side note, I tried the /a-z&&[^aeiou]]/i in rubular.com.  It
> basically said, "Forward slashes must be escaped".  I'm not sure it
> works.  I'm not familiar with using that website though.  I always just
> use IRB to test things.

Here's a demo I made for you: http://www.rubular.com/r/7sZKl7CqJ1

The "i" after the last forward slash makes it case-insensitive. The same 
as adding (?i) at the beginning.

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