A primer/refresher on the category theory concepts that most commonly crop up in conversations about Scala or FP. (Because it's embarassing when I forget this stuff!)
I'll be assuming Scalaz imports in code samples, and some of the code may be pseudo-Scala.
A functor is something that supports map.
| import com.petebevin.markdown.MarkdownProcessor | |
| import org.xhtmlrenderer.pdf.ITextRenderer | |
| import org.ccil.cowan.tagsoup.Parser | |
| import org.apache.xalan.xsltc.trax.SAX2DOM | |
| import org.xml.sax.InputSource | |
| buildscript{ | |
| repositories { | |
| mavenCentral() // i.e. http://repo1.maven.org/maven2 | |
| maven { url "https://oss.sonatype.org/content/groups/scala-tools" } |
| :paste | |
| import scalaz._, Scalaz._, scalaz.Free.{Suspend, Return} | |
| // Console grammar | |
| sealed trait ConsoleF[+A] | |
| object Console { | |
| case class WriteLine[A](msg: String, o: A) extends ConsoleF[A] | |
| case class ReadLine[A](o: String => A) extends ConsoleF[A] | |
| } |
