implicit

I have an implicit function, for example: f(x,y) = x.^3 + x.*y + y.^2 - 36 I want to solve the root. So f(x,y) = 0 . Drawing the solution is easy: ezplot('x.^3 + x.*y + y.^2 - 36',[-10 10 -10 10]); However, I would like to have the data that is in the plot and not only the visual plot. So how do I find the data of the plot? i.e., how to get data OUT of a plot once it is made? If you supply an output argument to ezplot , it will give you a line handle . One of the properties of line handles is XData and YData . To extract data from the line handles, use get : LH = ezplot('x.^3 + x.*y + y.^2 -

Any ideas why doesn't the following work? implicit def listExtensions[A](xs : List[A]) = new ListExtensions(xs) class ListExtensions[A](xs : List[A]) { def foreach[B](f: (A, Int) => B) { var i = 0; for (el <- xs) { f(el, i); i += 1; } } } var a = List(1, 2, 3); a foreach { (el, i) => println(el, i) }; When I compile this with fsc 2.8.1, I get the following error: "wrong number of parameters; expected = 1: a foreach { (el, i) => println(el, i) };". Am I doing something wrong or there simply ain't a way to add an overloaded method by the means of "pimp my library" trick? P.S. I wonder not about

I'm trying to make Gender implement the Show typeclass. scala> trait Gender extends Show[Gender] defined trait Gender scala> case object Male extends Gender defined object Male scala> case object Female extends Gender defined object Female Next, I defined a function that calls show on an implicit Show[A] . scala> def f[A : Show](x: A): String = implicitly[Show[A]].shows(x) f: [A](x: A)(implicit evidence$1: scalaz.Show[A])String Finally, I created an implicit class for Show[Gender] : scala> implicit class GenderShows(g: Gender) extends Show[Gender] { | g match { | case Male => "Male" | case

I have this Java class in a Jar file included as a dependency of an Scala program (like the Axis jar): class MyClass { private String[] someStrings; public String[] getSomeStrings() { return someStrings; } } In my Scala program I have a Java API that return an instance of MyClass instance of MyClass to my program in Scala: val myInstance = JavaAPI.getInstanceOfMyClass() Then I try to use the someStrings array in my Scala program but it's null (let say that it wasn't properly initialized) for(str <- myInstance.getSomeStrings()) ... So this throws a NullPointerException . I've found that in

I have a function that computes sum of squares for numeric types as shown below. import cats.syntax.functor._ import cats.syntax.applicative._ import cats.{Id, Monad} import scala.language.higherKinds object PowerOfMonads { /** * Ultimate sum of squares method * * @param x First value in context * @param y Second value in context * @tparam F Monadic context * @tparam T Type parameter in the Monad * @return Sum of squares of first and second values in the Monadic context */ def sumOfSquares[F[_]: Monad, A, T >: A](x: F[A], y: F[A])(implicit num: Numeric[T]) : F[T] = { def square(value:T): T =