I'd prefer the original one. I don't even know what "identity function" means.

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It's defined in the "preloaded" part. I don't think you can see that when training on a kata.

If only I read you before :p

Added 4: issue resolved :)?

Why you want testcases?? Just submit your solution and test your code...:)

Resolve if satisfied...:)

Fixed it! Thanks!

1Mm=1000000m, so it is just right.

I had similar problems, it wasn't the test case nor the description but me who was wrong!

Yes, maybe there is lack of definition..
I thought the expectation was the very last element, even deeply...
So..
last([123,40],[125,40],[125,39],[123,39]) // would output 39
last('test1','test2') // would output '2'
Passed the tests, but indead, I can't think of a real world application...

How is then this true?

axactly ! :) but but separate katas way is more strategic (two tasks (even three) == more honours :P) (hm... but maybe not so good for quality of tasks on this platform == fragmentation)

On the "single responsibility" point, can you not just create further functions that would be called internally?

Right. Thats the way the events are setup. You should have another, non-rank related, code challenge completed event that matches the total number of challenges that you have completed. You earn one point for each, so all of the rank specific events are then offset by one.

In the description, I said: If the "brief" notation is used, 2 and 3's suffix should be "d". The rest ("st" and "th") work as they normally do.