69 lines
1.7 KiB
Plaintext
69 lines
1.7 KiB
Plaintext
#load "str.cma"
|
|
open Str
|
|
|
|
let strip_cr str =
|
|
let last = pred (String.length str) in
|
|
if str.[last] <> '\r' then str else String.sub str 0 last
|
|
|
|
let map_records =
|
|
let rec aux acc = function
|
|
| value::flag::tail ->
|
|
let e = (float_of_string value, int_of_string flag) in
|
|
aux (e::acc) tail
|
|
| [_] -> invalid_arg "invalid data"
|
|
| [] -> List.rev acc
|
|
in
|
|
aux [] ;;
|
|
|
|
let duplicated_dates =
|
|
let same_date (d1,_) (d2,_) = (d1 = d2) in
|
|
let date (d,_) = d in
|
|
let rec aux acc = function
|
|
| a::b::tl when same_date a b ->
|
|
aux (date a::acc) tl
|
|
| _::tl ->
|
|
aux acc tl
|
|
| [] ->
|
|
List.rev acc
|
|
in
|
|
aux [] ;;
|
|
|
|
let record_ok (_,record) =
|
|
let is_ok (_,v) = v >= 1 in
|
|
let sum_ok =
|
|
List.fold_left (fun sum this ->
|
|
if is_ok this then succ sum else sum) 0 record
|
|
in
|
|
sum_ok = 24
|
|
|
|
let num_good_records =
|
|
List.fold_left (fun sum record ->
|
|
if record_ok record then succ sum else sum) 0 ;;
|
|
|
|
let parse_line line =
|
|
let li = split (regexp "[ \t]+") line in
|
|
let records = map_records (List.tl li)
|
|
and date = List.hd li in
|
|
(date, records)
|
|
|
|
let () =
|
|
let ic = open_in "readings.txt" in
|
|
let rec read_loop acc =
|
|
let line_opt = try Some (strip_cr (input_line ic))
|
|
with End_of_file -> None
|
|
in
|
|
match line_opt with
|
|
None -> close_in ic; List.rev acc
|
|
| Some line -> read_loop (parse_line line :: acc)
|
|
in
|
|
let inputs = read_loop [] in
|
|
|
|
Printf.printf "%d total lines\n" (List.length inputs);
|
|
|
|
Printf.printf "duplicated dates:\n";
|
|
let dups = duplicated_dates inputs in
|
|
List.iter print_endline dups;
|
|
|
|
Printf.printf "number of good records: %d\n" (num_good_records inputs);
|
|
;;
|