The F# version I passed the test. But when I attempt I got these errors:

Kata Tests/Null or Empty tests
at Microsoft.FSharp.Collections.ListModule.Tail[T] (Microsoft.FSharp.Collections.FSharpList1[T] list) [0x0001e] in <58dd0ce1dff9fae1a7450383e10cdd58>:0 at FSI_0001.sumArray (Microsoft.FSharp.Core.FSharpOption1[T] _arg1) [0x00028] in <6a5124875a2d4163be5140641db980de>:0
at FSI_0001+Tests+suite@21-1.Invoke (Microsoft.FSharp.Core.Unit _arg2) [0x0002b] in <6a5124875a2d4163be5140641db980de>:0
at Fuchu.Impl+evalTestList@260-1.Invoke (System.Tuple2[T1,T2] tupledArg) [0x00028] in <56a815db36d21f70a7450383db15a856>:0 Completed in 0.492400ms Kata Tests/Too few elements tests at Microsoft.FSharp.Primitives.Basics.List.take[T] (System.Int32 n, Microsoft.FSharp.Collections.FSharpList1[T] l) [0x0003d] in <58dd0ce1dff9fae1a7450383e10cdd58>:0
at Microsoft.FSharp.Collections.ListModule.Take[T] (System.Int32 count, Microsoft.FSharp.Collections.FSharpList1[T] list) [0x00001] in <58dd0ce1dff9fae1a7450383e10cdd58>:0 at FSI_0001.sumArray (Microsoft.FSharp.Core.FSharpOption1[T] _arg1) [0x0003a] in <6a5124875a2d4163be5140641db980de>:0
at FSI_0001+Tests+suite@25-2.Invoke (Microsoft.FSharp.Core.Unit _arg3) [0x0001f] in <6a5124875a2d4163be5140641db980de>:0
at Fuchu.Impl+evalTestList@260-1.Invoke (System.Tuple`2[T1,T2] tupledArg) [0x00028] in <56a815db36d21f70a7450383db15a856>:0

If the list is made up of only negative numbers, return 0 instead.

Isn't that what the kata asks?

This solution is incorrect. When pass a list with all negative numbers, it will return 0!

Calm down, this solution is incorrect! When pass a list with all negative numbers to it , it will return 0!!!

Yes, when pass a list with all negative integers to it, it would return 0!!!

Cool!

@Victor Tsui,

Your example list has 4 elements.

Description:

You are given an odd-length array of integers ...

It won't work all the time. when the list is [1,1,1,3], it returns 2!

OMG!Amazing!!!!