This really looks more like a regex task than anything else

The test cases should include different subdomains besides www. as shown by diognor, this can be solved easily without other test cases.

This is too easy and its missing some edge cases:

ftp://sub1.domain.co.uk
https://www.www.domain.com
https://www.subdomain.www.domain.com
ssh://user@domain.com

these are all valid, adding them them to the tests would increase the dificulty decently

Lovely Kata, I really like working with strings.

5 Kyu?? It's very esay

Groovy Translation

I'm pretty open for changes on this translation since it may not be 100% the same as in the Python translation

Improved Java translation

From a glance:

• Missing assertion messages in sample and fixed tests

• Adding unnecessary code block to description, which creates potential of merge conflicts for other published translations.

• Lack of test coverage and edge cases (refer to the issues raised in this kata) and also picking sub-sections of an email from a given collection of items is not so random

You can also see there are a lot of translations pending, which is associated with the point mentioned earlier. ^^

Is there a problem or are there multiple problems with the Java translation or why is it not being merged?

There is mistake bcz he never mentioned that there will be invalid url which is basically dfkljasidjfosdj.com. So instructions unclear and kata should be fixed to avoid confusions

I would've solved this had I know that the only possible subdomain is "www".

Description not detailed enough. It should be clarified that www is the only subdomain and http(s):// the only protocol being tested against.

Current solutions will not work reliably for most real-world URL's.

Here are some url-patterns that should also be tested:

• https://dev.google.com/
• https://sub.dev.google.com/
• smb://sub.dev.google.co.en/?someParameter=value
• ftp://sub.dev.google.co.en:21/?someParameter=value

The wording of the description is confusing as it actually wants a hostname returned, not a domain name. Aditionally, I encountered issues around the .co.za TLD

How is this an issue though? (Its just a miswording not an issue, the problem tells you what you need to do, so just do it or find other problems if you aren't satisfied with that detail).