Consider this code (taken from here and modified to use bytes rather than lines of characters). import java.io.{ File, InputStream, BufferedInputStream, FileInputStream } import scalaz._, Scalaz._...

I'm fairly new to scalaz and I am trying to figure out why the following code works: import scalaz._ import Scalaz._ scala> Map[String,List[String]]() |+| Map[String,List[String]]() res3: scala...

Could someone explain with real world examples how does work below methods of scalaz.Validation? I mean loopSuccess and loopFailure. Snippetes from source code (scalaz7): scalaz.Validation: /** ...

I am planning to start using Monadic style in my Scala code for, amongst others, threading state. Here's a simplified example of combining 3 monadic functions (and caring only about the side effect...

I am using scalaz7 in a project and sometimes I run into issues with imports. The simplest way get started is import scalaz._ import Scalaz._ but sometimes this can lead to conflicts. What I hav...

Possible Duplicate: Good scalaz introduction I would like to learn more about Scalaz, possibly using Scalaz7 to be avoid rewiring my brain once it is declared stable. My problem is th...

I am learning Scalaz and I have a project that already makes use of Scalaz7. Following this question I would like to use the function sequence[T](l: List[Option[T]]): Option[List[T]] (not that i...

an example use case: def div2(i: Int): Validation[String, Int] = if (i%2 == 0) Validation.success(i/2) else Validation.failure("odd") def div4(i: Int) = for { a <- div2(i) b <- div2(a)...

Given the following functions: def foo( a: A ): ValidationNEL[String,Seq[B]] = ... def bar( b: B ): ValidationNEL[String,C] = ... I would like to combine them such as to build a function, which...

Code to test with: import scalaz.{Reader, Applicative} class ReaderInstanceTest { type IntReader[A] = Reader[Int, A] val a = Applicative[({type l[A] = Reader[Int, A]})#l] // fine val b = App...