should be

  typedef struct {uint8_t *data, *dataend} 

if I'm not mistaken :)

What are the advantages of saving the end as a pointer? Genuinely curious. Seems like a length allows the end pointer to be quickly calculated (data + len), while being more useful for comparisons, etc.

You can remove the first k elements of a view with data += k.

With the length you would need to do data += k; length -= k

Especially if you want to use it as safe iterator, you can do data++ in a loop

> ...You can remove the first k elements of a view with data += k.

How would you safely free(data) afterwards? You'd need to keep an alloc'ed pointer somehow.

Got it. That is really neat, going to add to my bag of tricks...

Right. I always think the pointer declaration is part of the type. (that is why I do not use C. Is there really a good reason for this C syntax?)

Do you have any example of that different usage? I can't come up with one

I think it's not a one-time-investment at the beginning which is being measured, but a DCA (Dollar Cost Averaging) over a long period.

You accidentally duplicated the cs50 link. Where were you taking the operating systems class? I'm very interested :)

Sorry. here's the link. You'd love it.

[3]: https://www.ops-class.org

Have you been using it yourself to trade? How good would you say it is?

I don't like the notion of "hacking my brain".

First, it can create long term unwanted needs, such as requiring you to treat yourself for every little achievement. This could lead to a lot of things - weight gain, guilt, or all kinds of addictions (coffee, games..)

Second, I think that improvement is achieved by slow and consistent practice. "Hacks" are... well, hacks. They aren't supposed to be used over and over again.