| is bitwise or. | 0 does nothing by itself, just converts number to 32-bit number (it works this way in JS)

so here it's used for rounding (you could use Math.floor as well)

IMHO for consistency empty entry vector should return {0,0}... This special case precludes the use of a direct algorithm STL

System.NullReferenceException : Object reference not set to an instance of an object.
at Kata.CountPositivesSumNegatives(Int32[] input)
at SumTests.CountPositivesSumNegatives_InputNull()

I keep getting this error, new to C# and no clue why

could you give me a hint ? I use for loop, then time out...

And what's the suggestion? The instructions are clear.

Difficult to understand the problem

Which language, what's wrong?

Who can explain this code?? I am so confused...

what's the meaning of symbol | here? thank you~

this solution confused me。。。

because it can change the radix.