I think replace is better anyways. Don't need to worry about getting null returned, then have to check for it. null.length doesn't brake your code, because you where not turned a string or array.

If it return 1, I get expected 1 to deeply equal 2.
If it return 2, I get expected 2 to deeply equal 1.
I'm logging the loop, so I know there's only one running.

Well that killed my code.......

length thing will not work, example the recipe does not have milk, but the available obj does. And I don't think it would be best practice to assume that wouldn't happen, though I don't know if that is true or not.

This is what I want into the comment section hoping to find out. But no one ever answered you.

I don't understand this code, and would like to.