Racket-y way on multidimensional vectors operation?

Question

I\'ve read this question before, and followed Eli Barzilay\'s answer on srfi-25.

Besides reading the source code of srfi-25, I found writing some auxiliary function woul

Answer 1

An alternative to using nested vectors for multidimensional vectors is to use the math library's array data structure.

Here's an example use:

Welcome to Racket v6.4.0.4.
-> (require math/array)
-> (define arr (mutable-array #[#[1 2 3] #[4 5 6]]))
-> (array-ref arr #(0 0))
1
-> (array-ref arr #(1 2))
6
-> (array-set! arr #(1 2) 15)
-> (array-ref arr #(1 2))
15

There is a caveat that this will be slower when you use the library from untyped code (e.g., #lang racket). It will be fast when used in Typed Racket.