Too long; didn’t read — Learning APL
Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness, it’s a sign of strength. It shows you have the courage to admit when you don’t know something, and to learn something new. –Barack Obama
I started this from wanting to write down the few things that would have made my learning easier had I known them from the beginning. Many of those things (inevitably) now seem obvious, and this is probably part of the problem I faced at the time: the simple bits that everyone assumes everyone understands are only simple and obvious once you know them. Given that this book ended up creeping in scope, perhaps we should return to that original aim. What are the top-10 things that you really should take the time to understand from day 1, from practical to theoretical?
Arrays can only contain scalars. This means that everything in an array must have rank 0, and thus higher-rank elements must be enclosed before they can go in an array.
