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solved s11 ex02

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navid.sassan 2020-12-07 16:45:26 +01:00
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# a
```
(?:\d{1,3}\.){3}\d{1,3}
```
Genau genommen wird auch `999.999.999.999` gematched, obwohl das keine valide IP Adrese ist. Das würde aber den Regex sehr kompliziert machen.
# b
see https://en.wikipedia.org/wiki/Email_address#Local-part
```
[A-Za-z0-9.!#$%&'*+-\/=?^_`{|}~]+@[A-Za-z0-9.!#$%&'*+-\/=?^_`{|}~]+\.[A-Za-z]+
```
Hier werden gewisse Teile des RFC's ignoriert, zb `space and special characters "(),:;<>@[\] are allowed with restrictions`.