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agbell's solution

to Hello World in the Scala Track

Published at Jul 13 2018 · 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.

Hints

Common pitfalls that you should avoid

  • Usually there is no need in Scala to use return. For a discussion see here. Or as a quote from that discussion: Don't use return, it makes Scala cry.

The Scala exercises assume an SBT project scheme. The exercise solution source should be placed within the exercise directory/src/main/scala. The exercise unit tests can be found within the exercise directory/src/test/scala.

To run the tests simply run the command sbt test in the exercise directory.

For more detailed info about the Scala track see the help page.

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.

HelloWorldTest.scala

import org.scalatest.{Matchers, FunSuite}

/** @version 1.1.0 */
class HelloWorldTest extends FunSuite with Matchers {

  test("Say Hi!") {
    HelloWorld.hello() should be ("Hello, World!")
  }
}
/**
 * Created by adam on 8/22/16.
 */
object HelloWorld {
  def hello(name: String = "World"): String = s"Hello, $name!"
}

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