laredotornado wrote:

> If I have a variable @fax, how can I apply a regular expression to the
> variable such that all non-numeric characters are removed?  You can
> assume the fax number is of a valid US format.

str = '1234abc5d6e7f8ghi'

result = str.gsub(/\D/, "")
puts result

--output:--
12345678
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