On Tue, Nov 18, 2008 at 1:50 PM, Chouser <[EMAIL PROTECTED]> wrote: > > On Tue, Nov 18, 2008 at 11:44 AM, everyman <[EMAIL PROTECTED]> > wrote: > > > > The signature for the Java constructor I am trying to use is: > > ; Matrix(double[][] A) > > > > (ns clojure-matrix > > (:import (Jama Matrix))) > > > > clojure-matrix=> (new Matrix (to-array-2d [[1.0 2.0] [3.0 4.0]]))) > > > > java.lang.ClassCastException: [[Ljava.lang.Object; cannot be cast to > > [[D > This should build what you want: > user=> (def my-tricky-array (into-array (map #(into-array Double/TYPE > %) [[1 2][3 4]]))) > #'user/my-tricky-array > > Take a look at it, and see that the type signature looks good: > user=> my-tricky-array > #<double[][] [EMAIL PROTECTED]> >
Here's a slight tweak using double-array instead of nested calls to into-array (double-array isn't mentioned in clojure.org/java_interop page, but it is in the full API listing): user=> (into-array (map double-array [[1.0] [2.0]])) #<double[][] [EMAIL PROTECTED]> Shawn --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
