Convert a number to a string, the contents of which depend on the number's factors.
For library documentation, follow Useful OCaml resources.
A Makefile
is provided with a default target to compile your solution and run the tests. At the command line, type:
make
It's possible to submit an incomplete solution so you can see how others have completed the exercise.
The exercism/ocaml repository on GitHub is the home for all of the Ocaml exercises.
If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue or submit a PR. We welcome new contributors!
A variation on a famous interview question intended to weed out potential candidates. http://jumpstartlab.com
(* raindrops - 1.1.0 *)
open OUnit2
open Raindrops
let ae exp got _test_ctxt = assert_equal ~printer:(fun x -> x) exp got
let tests = [
"the sound for 1 is 1" >::
ae "1" (raindrop 1);
"the sound for 3 is Pling" >::
ae "Pling" (raindrop 3);
"the sound for 5 is Plang" >::
ae "Plang" (raindrop 5);
"the sound for 7 is Plong" >::
ae "Plong" (raindrop 7);
"the sound for 6 is Pling as it has a factor 3" >::
ae "Pling" (raindrop 6);
"2 to the power 3 does not make a raindrop sound as 3 is the exponent not the base" >::
ae "8" (raindrop 8);
"the sound for 9 is Pling as it has a factor 3" >::
ae "Pling" (raindrop 9);
"the sound for 10 is Plang as it has a factor 5" >::
ae "Plang" (raindrop 10);
"the sound for 14 is Plong as it has a factor of 7" >::
ae "Plong" (raindrop 14);
"the sound for 15 is PlingPlang as it has factors 3 and 5" >::
ae "PlingPlang" (raindrop 15);
"the sound for 21 is PlingPlong as it has factors 3 and 7" >::
ae "PlingPlong" (raindrop 21);
"the sound for 25 is Plang as it has a factor 5" >::
ae "Plang" (raindrop 25);
"the sound for 27 is Pling as it has a factor 3" >::
ae "Pling" (raindrop 27);
"the sound for 35 is PlangPlong as it has factors 5 and 7" >::
ae "PlangPlong" (raindrop 35);
"the sound for 49 is Plong as it has a factor 7" >::
ae "Plong" (raindrop 49);
"the sound for 52 is 52" >::
ae "52" (raindrop 52);
"the sound for 105 is PlingPlangPlong as it has factors 3, 5 and 7" >::
ae "PlingPlangPlong" (raindrop 105);
"the sound for 3125 is Plang as it has a factor 5" >::
ae "Plang" (raindrop 3125);
]
let () =
run_test_tt_main ("raindrops tests" >::: tests)
let raindrop n =
match
(if n mod 3 == 0 then "Pling" else "") ^
(if n mod 5 == 0 then "Plang" else "") ^
(if n mod 7 == 0 then "Plong" else "")
with
| "" -> string_of_int n
| rain -> rain
A huge amount can be learned from reading other peopleâ€™s code. This is why we wanted to give exercism users the option of making their solutions public.
Here are some questions to help you reflect on this solution and learn the most from it.
Level up your programming skills with 3,429 exercises across 52 languages, and insightful discussion with our volunteer team of welcoming mentors. Exercism is 100% free forever.
Sign up Learn More
Community comments