This is precisely what 'for' is for in clojure.
For example:
(for [x (range 10) y (range 10)] [x y])
... produces a sequence of the coordinates in a 10x10 grid. You can
then consume the sequence for whatever purpose. The position of each
matrix coord in the seq produced would match up with the position of
the data in your array.
On May 29, 9:19 am, WoodHacker <ramsa...@comcast.net> wrote:
> I've been working with Lisp and Scheme for the past few years and have
> migrated to Clojure because of the JVM. I think I get functional
> programming, but one problem is giving me fits.
>
> I'm working on a simple imaging problem. I want to copy an array of
> pixels to an image buffer. That means that I have to deal both with
> an array and a matrix (x and y). As I go along my array, each time x
> reaches the end of a line in the matrix I have to set it back to zero
> and increment y.
>
> I can find no simple way to do this without getting a compile error.
> Can someone show me how to do this?
>
> Example in pseudo code:
>
> x = 0
> y = 0
>
> for (k = 0; k < 256; ++k)
> if (= x 16) {
> x = 0
> (inc y)
> }
> else
> (inc x)
>
> writeBuffer (x, y, value[k])
>
> Bill
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