MAC address validation
Q
According to the IEEE 802 specification, a MAC address has 6 groups of 2 hexadecimal digits separated by "-" or ":". For example, 0a-1b-3c-4d-5e-6f is a valid MAC address.
How to write a single regular expression to validate a MAC address described above?
✍: FYIcenter.com
A
Here is the regular expression for MAC address validation:
^((([0-9A-Fa-f]{2}:){5})|(([0-9A-Fa-f]{2}-){5}))[0-9A-Fa-f]{2}$
^ - begin of the string
[0-9A-Fa-f] - any hex digit
{2} - repeating 2 times
: - a single :
{5} - repeating 5 times
| - the OR logic
([0-9A-Fa-f]{2}-){5} - 5 times of 2 hex digits followed by -
$ - end of the string
2017-05-15, 15699👍, 5💬