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4d47's solution

to Hello World in the Nim Track

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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.

Running the tests

To compile and run the tests, just run the following in your exercise directory:

$ nim c -r hello_world_test.nim

Submitting Exercises

Note that, when trying to submit an exercise, make sure the solution is in the $EXERCISM_WORKSPACE/nim/hello-world directory.

You can find your Exercism workspace by running exercism debug and looking for the line that starts with Exercises Directory.

Need help?

These guides should 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.

helloworld_test.nim

import unittest

import helloworld

suite "Hello World":
  
  test "no name":
    check helloworld() == "Hello, World!"

  test "sample name":
    check helloworld("Alice") == "Hello, Alice!"

  test "other sample name":
    check helloworld("Bob") == "Hello, Bob!"
proc helloworld*(name = "World"): string =
  "Hello, " & name & "!"

What can you learn from this solution?

A huge amount can be learnt from reading other people’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.

  • What compromises have been made?
  • Are there new concepts here that I could read more about to develop my understanding?