I usually do something like this little sample. Calculations go in the
let bindings and new elements are conjoined into the vector.
(defn foo [n]
(loop [v [] i 0]
(if (= i n)
v
(let [x (* i i)]
(recur (conj v x) (inc i))))))
user=> (foo 6)
[0 1 4 9 16 25]
On Jan 21, 8:07 am, WoodHacker <[email protected]> wrote:
> I'm converting the java code examples in Killer Game Programming in
> Java by Andrew Davison to Clojure and am having great fun doing it.
> But I've hit wall where I can't seem to get the code to work.
>
> The following code moves an animated gif strip to a java array:
>
> public BufferedImage[] loadStripImageArray(String fnm, int number)
> {
> if (number <= 0) {
> System.out.println("number <= 0; returning null");
> return null;
> }
>
> BufferedImage stripIm;
> if ((stripIm = loadImage(fnm)) == null) {
> System.out.println("Returning null");
> return null;
> }
>
> int imWidth = (int) stripIm.getWidth() / number;
> int height = stripIm.getHeight();
> int transparency = stripIm.getColorModel().getTransparency();
>
> BufferedImage[] strip = new BufferedImage[number];
> Graphics2D stripGC;
>
> // each BufferedImage from the strip file is stored in strip[]
> for (int i=0; i < number; i++) {
> strip[i] = gc.createCompatibleImage(imWidth, height,
> transparency); <=====
>
> // create a graphics context
> stripGC = strip[i].createGraphics();
> <=====
> // stripGC.setComposite(AlphaComposite.Src);
>
> // copy image
> stripGC.drawImage(stripIm,
> 0,0, imWidth,height,
> i*imWidth,0, (i*imWidth)+imWidth,height,
> null);
> stripGC.dispose();
> }
> return strip;
> } // end of loadStripImageArray()
>
> The problem I'm having is with the for loop. If I create an abject
> array of say 6 buffered images, how do I reference the indexed image
> array to match the lines pointed to? In other words what is the
> equivalent of strip[i] in Clojure?
>
> I'm not exactly a beginner, but this has stumped me.
>
> Bill
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