public virtual void test_map() { double[][] @base = new double[][] { new double[] { 1d, 2d }, new double[] { 3d, 4d }, new double[] { 5d, 6d } }; DoubleMatrix test = DoubleMatrix.copyOf(@base); assertMatrix(test.map(v => 1 / v), 1d, 1d / 2d, 1d / 3d, 1d / 4d, 1d / 5d, 1d / 6d); }