Re: Newbie: cloning a Number
Philipp wrote:
Patricia Shanahan wrote:
Andreas Leitgeb wrote:
Patricia Shanahan <pats@acm.org> wrote:
Maybe it's time to look at the problem one level up? Why is the Number
copy being made? Does it make sense for all Number implementations?
OK from the problem perspective:
My application needs some parameters (Number). I have some presets value
for these params which I want to store in a class called
ConvolutionMatrixSetting. I want to be sure that once I have constructed
an instance of this class, each time I call it (with some getter) I am
sure to get back the original values with which it was constructed.
This is the expected behavior and should in no way depend on what has
happened outside the setting class.
How should this be done?
PS: Thanks all for your input on the /immutable/ subject.
What are you ultimately going to do with the Number? Usually one does
arithmetic using the elements of a convolution matrix, but Number is not
an arithmetic type, and there is no user-defined operator overloading,
so that is not practical.
Patricia