FixedSizeArrays.jl is a package for the Julia programming language which implements mutable fixed-size arrays (FixedSizeArray), which means the length of the array can not change after construction and is amenable to be constant-propagated at compile-time when possible.
FixedSizeArrays supports the standard array interfaces, so things like broadcasting, matrix multiplication, other linear algebra operations, similar, copyto! or map should just work.
Find more in the manual: