OCaml 中的数组操作

let arr = Array.make 5 0;;

let first_element = arr.(0);;

arr.(0) <- 1;;

let length = Array.length arr;;

Array.iter (fun x -> print_int x; print_newline ()) arr;;

let arr_copy = Array.copy arr;;

Array.sort compare arr;;

let arr_map = Array.map (fun x -> x * 2) arr;;

let arr_filter = Array.filter (fun x -> x > 2) arr;;

let arr_reduce = Array.fold_left (fun acc x -> acc + x) 0 arr;;