_array produces a ctype, not an actual array itself. To get an array you can
create one with malloc or you can call a C function through the ffi.
If you use malloc then you get back a generic # type which you can
convert to an array using ptr-ref as per the docs:
"Since an array is treated like
in the reference, I see the _array function, but I don't understand well, when i try to do, always output errors, can anyone give me an example? here is my test in REPL:racket@> (_array _int 3)#racket@> (array? (_array _int 3)) ; why?#fracket@>
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