I have a collection of records spread across a number of types in a large Haskell application that reference each other. All of the types involved implement a common typeclass. The typeclass contains
I have to program (C++) and find the true value of the following. I am uncertian as to what it exactly means.
First attempt It\'s difficult to make this question pithy, but to provide a minimal example, suppose I have this type:
I want to 开发者_JAVA百科implement some kind of component system in Java. There is an interface, called Form
Suppose I have a compound data type - data M o = M (String,o) Now, I can define a function that works for ALL M irrespective of o. For example -
I want to use a map of varying types on an unknown A: val map: Map[Foo[A开发者_如何学C], Bar[A]] = ...
In Pro开发者_JAVA技巧gramming in Scala, the following example is given to show how to reference a Java class with wildcards.The method javaSet2ScalaSet takes a type T.Typically, you can always explici
I\'m trying to do something roughly like the following: trait MyData trait MyId trait MyDataType[T <: MyData] {
(UPDATE: simplified the code and also show why it should work) How can I fix this code?: case class Sub[B <: Seq[_] : Manifest](b: B) {
I was trying to implement the state monad in OCaml (as an exercise). My implementation looks like this:
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