[list-ops]: change // to / and swap foldr arg order

[IsaacG]

Related Forum Discussion here.

[BethanyG]

@IsaacG -- you should add your name as a contributor to this exercise. 😄

[BethanyG]

Can we also put in a comment in the JinJa2 template to maybe remind the next set of folx (more than likely our future selves) why we're swapping arguments? I just think that this will come up again, so any places we can comment for posterity will be helpful. JinJa2 Comments.

[IsaacG]

Can we also put in a comment in the JinJa2 template to maybe remind the next set of folx (more than likely our future selves) why we're swapping arguments? I just think that this will come up again, so any places we can comment for posterity will be helpful. JinJa2 Comments.

Sure! I can add that once I get homen in a few hours.

If we are going to break existing solutions, I would vastly prefer to have foldr & foldl both be (acc, el), so that foldl is consistent with Haskell tradition. But I am going to go with your first PR, so we can be done with this debate. 😄

That was actually my first commit. That approach is simpler (less code, no need to swap, no need for a comment). I'm happy to do that, too. It's closer to what is in the problem spec.

[IsaacG]

I added a comment to the JinJa2 template.

If you prefer func(acc, el), #3405 does that.

[BethanyG]

Alright. I am going to go with #3405, and close this one in favor of that. @IsaacG -- can you add yourself as an exercise contributor to that PR? As soon as that is done, I'll approve and merge. Many thanks!