CODEWITHSUNDEEP
regexregex-negation
Majoris
Majoris

Reputation: 3189

Regex NOT or exclude match

How do I make regex match and exclude certain character. For example, I am making an regex for all country's TDL match. 

[a-z]{1,}((?!.ru)|.kr|.lt|.cn|.uk|.id|)

or 

[a-z]{1,}.([a-z]{1,})

gsdfg.ru <- This shall match

sgkjsr.us <- only .us should not match or should excluded

Upvotes: 0

Views: 3512

Answers (1)

Sergiu Dumitriu
Sergiu Dumitriu

Reputation: 11601

This should work (blacklisting):

\.(?!us|eu)[a-z]{2}$

It searches for a dot (\.), which isn't followed by us or eu ((?!us|eu)), and is followed by two lowercase letters ([a-z]{2}), right at the end of the string ($).

This should also work (whitelisting):

\.(?:ru|kr|cn|uk|id)$

It searches for a dot (\.), which is followed by one of ru, kr ... or id, right at the end of the string ($). I used (?:...) instead of a simple (...) so that the group doesn't create a capture. If you actually need to capture the country code for later user, feel free to remove the ?: part.

Upvotes: 3

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