It's a brief passage from an original piece I composed for piano solo. If you happen to be curious, I have a number of recordings of my own compositions (as well as performances I've given of the works of other composers) on my YouTube channel (www.youtube.com/johncareycomposer). Thanks for your interest!

(By the way, apparently my code was failing due to a flaw in the test case itself, which has apparently been revised -- I just attempted to resubmit and I passed 100% immediately, despite the fact that I didn't alter my expression at all.)

what is the music in your image?

Hello, regex is an external library, not a standard library module, so there is nothing kata authors and contributors can do about it.

• you can see the list of installed libraries here
• you can request new packages here (but don't get your hopes up)

Python: Could regex (not just re) get enabled, because this kata seems to be a use case for recursion?

PHP -- a language I'm not really familiar with, but it supports subroutines in Regex whereas Python (my preferred language) does not. Not sure if that's relevant.

Thanks for the quick response!

In what language?

After 2 days i finally passed all the tests, yet unsure how and why

Totally agree

( JS, possibly others )

Needs random tests.

C++ translation: https://www.codewars.com/kumite/64a89e76dddc251d5fdfced4?sel=64a89e76dddc251d5fdfced4

oky thanks :3 I understand a little I think

The point of this kata is not to write a function boolean isDiv5(String s), but to create a regular expression that will match all strings that represent in binary a number divisible by five and only these strings.

For example, this regular expression should match "101", "0" and "1111" because they represent 5, 0 and 15.
But it should not match "111", "10000" nor "1" as they represent 7, 16 and 1.

Excellent kata. But why is everything so strange here? I am not yet fully familiar with Java and I don’t know other languages, and I just can’t figure out where to get the string from and what to return. Why complicate things so much? :( Where are these regular methods with the usual String parameter? ;(

Nice kata, simple yet challenging, made me refresh my knowledge on regex