20 lines
565 B
Markdown
20 lines
565 B
Markdown
# Check MAC-address
|
|
|
|
[MAC-address](https://en.wikipedia.org/wiki/MAC_address) of a network interface consists of 6 two-digit hex numbers separated by a colon.
|
|
|
|
For instance: `subject:'01:32:54:67:89:AB'`.
|
|
|
|
Write a regexp that checks whether a string is MAC-address.
|
|
|
|
Usage:
|
|
```js
|
|
let regexp = /your regexp/;
|
|
|
|
alert( regexp.test('01:32:54:67:89:AB') ); // true
|
|
|
|
alert( regexp.test('0132546789AB') ); // false (no colons)
|
|
|
|
alert( regexp.test('01:32:54:67:89') ); // false (5 numbers, must be 6)
|
|
|
|
alert( regexp.test('01:32:54:67:89:ZZ') ) // false (ZZ ad the end)
|
|
```
|