danielasfregola / get-programming-with-scala Goto Github PK

My dependencies are exactly the same as those in the book

    "org.testcontainers" % "postgresql" % "1.15.3",
    "org.postgresql" % "postgresql" % "42.2.22",

However, I suffered "dead code following this construct" error in the line of
val psql: PostgreSQLContainer[_] = new PostgreSQLContainer(imageVersion).withInitScript(initScript)

What can I do to fix this plz?

Hiya Daniela,

In listing §7.5 the welcome method for Robot is missing the interpolation operator s"..", so it should look like:

def welcome(n: String) = s"Welcome $n! My name is $name"

rather than:

In Listing 10.4, the field var cost is initialized in the primary constructor and gets never updated since then. It should be def cost.

Upgrade all existing lessons to the latest version of Scala (currently 2.12.7)

Hi, I have a question about implicit resolution explained in Lesson 42.

Your "Try This" answer imports the typeclass implementation as import Money.numeric._.

According to the page 386, we should be able to import as import Money.given but it gets compile error. According to figure 42.3 on page 387, it should even get resolved without importing since given declaration resides in the companion object. Why do we need to import as import Money.numeric._ in this case?

Trying to do the Database Queries with Quill lesson and seem to be running into a problem.

When calling queries.testConnection() I get the error;

com.github.jasync.sql.db.exceptions.UnsupportedAuthenticationMethodException: Unknown authentication method -> '10'

I've tried looking into the container with little luck by finding some helpful messages about modifying the postgresql.config before the container starts... but this is docker, so before making my own image I just wanted to see if anyone else has had this problem. On macOS if that helps.