Bless you for pointing this out. So frustrating.

Yeah, that's pretty much the gist of it. If you want a much more detailed dive, check out this link (just read the "Contents" section linked, the rest of that page is pretty unrelated to the question):
https://github.com/getify/You-Dont-Know-JS/blob/master/this%20%26%20object%20prototypes/ch3.md#contents

At most, you only need to look at the first three entries to determine if odd or even is the "normal" state, since there is only one unusual number. In many cases, you can look at just the first two entries: if they're both the same parity, that's the "normal" state.

From there, traverse the array looking for the first number to not match the "normal" state.