Thansk for agreeing that I'm correct! I thought I was going mad. I'm not sure (I'm in training and have a lot to still learn about Ruby). However, I dind't modify any of the inputs for the random tests.

I am attempting this kata in Ruby and passed all the test cases. However, in the random tests, if the input array has 3 + 0s in it I am failing.

When I check the expected compared to my solution, the expected seems to have always deleted the 3rd & 4th 0 of the input array, but surely it should only be deleting the 4th as that's the second 0 in the pair. Surely only every other occourance should be deleted? I can see people have passed the test on Ruby so am I just missing something here? Some examples below:

Examples:
[5, 4, 3, 7, 4, 3, 2, 9, 2, 9, 7, 1, 2, 8, 0, 0, 3, 2, 7, 4, 5, 4, 9, 0, 4, 0, 5, 2, 5, 5, 4, 0, 2, 3, 5, 4, 6, 2, 5, 4, 9] input
[5, 4, 3, 7, 4, 3, 2, 9, 2, 9, 7, 1, 2, 8, 0, 3, 2, 7, 4, 5, 4, 9, 4, 5, 2, 5, 5, 4, 0, 2, 3, 5, 4, 6, 2, 5, 4, 9] expected
[5, 4, 3, 7, 4, 3, 2, 9, 2, 9, 7, 1, 2, 8, 0, 3, 2, 7, 4, 5, 4, 9, 0, 4, 5, 2, 5, 5, 4, 0, 2, 3, 5, 4, 6, 2, 5, 4, 9] my result

[6, 3, 9, 2, 9, 0, 7, 7, 5, 4, 9, 1, 7, 6, 4, 5, 0, 6, 0, 9, 6, 6, 3, 9, 0, 2, 4, 5, 7, 3, 8, 1, 2, 9, 4, 7, 4, 0, 0, 6, 5, 4, 4, 4, 4, 2, 7, 8, 6, 1] input
[6, 3, 9, 2, 9, 0, 7, 7, 5, 4, 9, 1, 7, 6, 4, 5, 6, 9, 6, 6, 3, 9, 2, 4, 5, 7, 3, 8, 1, 2, 9, 4, 7, 4, 0, 6, 5, 4, 4, 4, 4, 2, 7, 8, 6, 1] expected
[6, 3, 9, 2, 9, 0, 7, 7, 5, 4, 9, 1, 7, 6, 4, 5, 6, 0, 9, 6, 6, 3, 9, 2, 4, 5, 7, 3, 8, 1, 2, 9, 4, 7, 4, 0, 6, 5, 4, 4, 4, 4, 2, 7, 8, 6, 1] my result

[1, 4, 7, 5, 6, 0, 8, 1, 0, 6, 6, 5, 2, 2, 6, 2, 7, 4, 7, 0, 2, 3, 8, 4, 0, 9, 8] input
[1, 4, 7, 5, 6, 0, 8, 1, 6, 6, 5, 2, 2, 6, 2, 7, 4, 7, 2, 3, 8, 4, 9, 8] expected
[1, 4, 7, 5, 6, 0, 8, 1, 6, 6, 5, 2, 2, 6, 2, 7, 4, 7, 0, 2, 3, 8, 4, 9, 8] my result

Thanks

I am an idiot who can't read questions properly. Thank you v much for your help, that was a simple fix in the end, and sorry for wasting your time!