I hear about boxing a lot. What is it? Thanks.
On Tue, Jan 13, 2009 at 12:49 AM, CuppoJava <patrickli_2...@hotmail.com>wrote:
>
> Hi,
> I'm still getting used to the primitive support in Clojure, and I want
> to confirm my understanding.
>
> As far as I know, primitive support is only supported in local let
> bindings, right?
>
> So in designing a vector math library,
>
> To translate from Java, one would write a class with primitive fields.
>
> class Vector{
> float x,y,z;
> }
>
> What would be the best choice in Clojure?
>
> {:x 0 :y 0 :z 0}
> I think a map would have too much overhead to retrieve and set keys.
> Is that correct? Although this is the most straight-forward
> conversion.
>
> A 3-element vector
> [0 0 0]
> Still has the boxing/unboxing overhead. (Unless Clojure supports
> primitives in collections, which I'm not sure about)
>
> A Java array
> (make-array Float/TYPE 0)
> Is this the most efficient representation?
> I don't really like this representation, cause I lose the named
> fields, as well as the ability to put other types of data into the
> same vector struct.
> >
>
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