scala-labs / scala-labs

A collection of hands-on programming exercises aimed at teaching you to program in Scala

This is the top level project for the Scala ITR. It will contain all the exercises and the test suite.

How to run test

Tests can be run from within labs directory like this: sbt "testOnly org.scalalabs.basic.lab01.HelloWorldExerciseTest"

Note: We recommend to use sbt interactively instead of starting sbt each time you want to run a test. See Running the sbt shell

scala-labs's Issues

How to run Scala Tests

I've figured out that to install sbt it was as simple as a brew install sbt.

I go into the terminal, run sbt and I'm where I should be.

I run test and I get 23 failing tests. How do I run a specific test? How do I get just the HelloWorldExercise.scala running?

Misleading method name

In basic/lab01, HelloWorldClassAndObject.echo is a misleading name since it does not echo back the argument as echo did before (in fact, it doesn't even have an arg). getMyText or similar would be better.

Issue with Exercise 4 Lab 001 Scala

Provide an implicit class that adds a *(euro:Euro) method to Int

• - Create a new currency Dollar
• - Provide a implicit conversion method that converts from Euro to Dollar using the
• [[org.scalalabs.basic.lab01.DefaultCurrencyConverter]]

I would have expected to see an implicit declaration for the converter in the currency converter, but I am not experienced enough with Scala to know whether or not that will fix my issue.

org.scalalabs.intermediate.lab02.SecondExerciseTest.testFindFriendsThatAreAlsoFollowers solution wrong

l1 intersect l2 returns 0, I find out while checking my solution (l1.filter( (el) => None != l2.find( _.screen_name==el.screen_name ) )), tried and the result is the empty list