Ah, gotcha. Totally understand!

Probably more idomatic to write the first line as:

return false if string[position] == nil || position < 0

For the Ruby version, the tests use the method to_camelcase though the default method has it set up as to_camel_case.

Seems to be working now. Great!

I think I'm running into the same issue as omegahm. For example, in the previous random test I passed with:

Test Passed: Value == [98, 97, 94, 53, 46, 36]

But in the following test (which had a max array size of 4), I get:

Expected: [98, 97, 97, 95], instead got: [97, 95, 87, 83]

However, when I printed the input, there was never a 98:

4, 77, 75, 70, 67, 87, 97, 83, 95

FWIW it's in only the random tests this is happening.

You don't need the return on line 3 since the value of the last evaluated expression in a method is the return value of the method

For "up" and "down" you can just set x to 0 and 1 respectively since there are only two rows (as opposed to using the ternary operator).