I’m curious about why we even bother implementing a count() method in any of the Data Structures in the books (Morepy or Javascript). Wouldn’t it be faster to just declare a property called count or length and increment that?
For educational purposes? So we learn how cumbersome it is to get that count? 
For what it’s worth, the data structures in the C book do have a count ‘property’.
Absolutely, and you should do that. Actually I think that’s an extra credit or I work on making it faster at some point. Let me know if I don’t.
Also, remember that you would never actually implement any of these data structures in JavaScript or Python. Those languages already have built-in hyperfast structures for most everything you need so doing this is purely an exercise. If I didn’t stress that enough in the book let me know.
I read through the book and I didn’t spot that particular extra credit, but perhaps the videos have it. I’ll keep you posted.
Otherwise it’s clear that this is just an exercise.
@zedshaw, if I have done the data structures in C, would you say I’m missing much if I skip that part in Learn More Python? I’m kind of eager to get to the parsing section…