there are now 10 languages so it's too late to completely overhaul the kata. there is another kata about the more general case

Fork approved by someone, closing

added to JavaScript and CoffeeScript, + upgrade to chai assertions. random tests only missing in Swift

thanks !

this seems to have been fixed by the upgrade to C# 12:

Test Failed
  Assert.That(actual, Is.EqualTo(expected))
  Expected: < < 37, 93 >, < 4, 12 > >
  But was:  null

the OP solved the kata, I opened another issue about the poor assertion messages

your algorithm does not perform matrices mutliplication: you always use the row and column 0 and 1:

c[i][j] = (a[i][0] * b[0][j]) + (a[i][1] * b[1][j]);

your code crashes because this performs out-of-bounds accesses for a 1 x 1 matrix

approved

The instruction and test spec makes it confusing. But solved it anyway.

This took way longer than it should have. But no timeout, which is a good thing.

One of the most fun problems I've seen so far yet I'm unable to solve it due to the timeout XD

This kata is a subject to deduplication process here: https://github.com/codewars/content-issues/issues/227.
Please join the discussion to help us identify duplicate kata and retire them.

Self approved R after 4 years :-)