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nihilismus's solution

to Hello World in the Standard ML Track

Published at Sep 11 2020 · 0 comments
Instructions
Test suite
Solution

The classical introductory exercise. Just say "Hello, World!".

"Hello, World!" is the traditional first program for beginning programming in a new language or environment.

The objectives are simple:

  • Write a function that returns the string "Hello, World!".
  • Run the test suite and make sure that it succeeds.
  • Submit your solution and check it at the website.

If everything goes well, you will be ready to fetch your first real exercise.

Loading your exercise implementation in PolyML

$ poly --use {exercise}.sml

Or:

$ poly
> use "{exercise}.sml";

Note: You have to replace {exercise}.

Running the tests

$ poly -q --use test.sml

Feedback, Issues, Pull Requests

The exercism/sml repository on GitHub is the home for all of the Standard ML exercises.

If you have feedback about an exercise, or want to help implementing a new one, head over there and create an issue. We'll do our best to help you!

Source

This is an exercise to introduce users to using Exercism http://en.wikipedia.org/wiki/%22Hello,_world!%22_program

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

test.sml

(* version 1.0.0 *)

use "hello-world.sml";
use "testlib.sml";

infixr |>
fun x |> f = f x

val testsuite =
  describe "hello-world" [
    test "Say Hi!"
      (fn _ => hello () |> Expect.equalTo "Hello, World!")
  ]

val _ = Test.run testsuite
fun hello () =
  "Hello, World!"

Community comments

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What can you learn from this solution?

A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.

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  • What compromises have been made?
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