I wrote a method to parse Metrics data and at first faced a problem with the type of transactionMap which is a java.util.Map. And I solved it using JavaConverters.
This code fails to compile:Above code fails to compile with following error:But, this code compilesWhy does the name of an implicit def should matter?
I'm a beginner with Cats. I have an error with Validated cats. I use a list accumulator like that :When I use this function with my case class Types :
I am approaching the Haskell programming language, and I have a background of Scala and Java developer.
I am new to Scala and have a hard time understanding all the ways of declaring and using functions. Can someone please explain, step by step, what is going on here?
But I get this cryptic error from the compilerThe problem is that you're asking too much of Scala's type inference. It's trying to figure out the type parameter it needs for doFoo[?](number), and while it's pretty clear to us as humans that it has to be F given the context...
I was trying to write a mkString function in Java8, a la Scala's useful mkString and ran into 2 issues that I could use some help on:
In general I have problems figuring out how to write tailrecursive functions when working 'inside' monads. Here is a quick example:
I want to use keyed stream, I was wondering which approach is better in high throughput lets's say I have the following
Is it somehow possible to use an external library inside the build.sbt file?E.g. I want to write something like this: