arrays are allocated on stack

[maksimryndin]

As far as I understand, array allocation on the stack occurs anyway

[locka99]

An immutable vec! would be similar to a heap allocated array. My point in the comment was to illustrate arrays normally go onto the stack but can be made to go in the heap.

[maksimryndin]

Thank you very much for you book - very helpful and thorough explained!
As for an array, as far as I see, we cannot allocate it on heap without allocating on stack first.