Hi,
Can someone give me a hand on the validation of the credit card format
for the homework of the Active Record lesson?
It says:
# User can enter the credit card format in the following format. The
x has to be numeric value.
* xxxx-xxxx-xxxx-xxxx (format #1)
* xxxx xxxx xxxx xxxx (format #2)
* xxxxxxxxxxxxxxxx (format #3)
If someone could write the regex for it nicely that would be very helpful.
Regards,
Vanessa
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