A simple but very interesting Kata. Grate job with the test cases. :D

Kata description should not contain external links, all information && requirements should be contained within, and if any other information is required due to a lack of knowledge or understanding, then it is up to the solvers to dig the info themselves (very easy these days ~~ ^^

First Google Search Result

I would suggest to include links to learn the topics that are labeled.

Any recomendation on a good resource on java regex topic?

No need to use regex to complete this kata

i added this fixed test to C.

(C translation)
I had a bad approach to accepting the sign which completely passed the full tests but correctly fails after I added this to sample tests:

do_test(".+25", false);

There is of course already one like it:

	do_test("2.+25", false);

but my original way of permitting the + handled that one "accidentally correctly" by noting that there was a digit before it without bothering about its position in the string. After fixing my solution I hacked it back into a fork, which shouldn't have passed.

Approved.

Approved

Just added them to Ruby and several other languages, now all of them have the mentioned edge cases

The test is perfectly valid since the kata does not specify any constraints on character range, a.k.a any character is to be expected and handled gracefully

Perhaps reading this might help ~~ Also not a kata suggestion

Not a kata suggestion