Remove byte from array?

Programming Questions

prismspecs

in Programming Questions • 5 months ago

void setup() {
size(200, 200);

// Open a file and read its binary data
byte b[] = loadBytes("veil.jpg");

println(b.length);

for (int out_count = 0; out_count < 100; out_count++) {

    for (int i = 0; i < 1; i++) {

      b.splice(int(random(0, b.length)), 1);

    }

    saveBytes("veil" + out_count + ".jpg", b);
}
}

So b.splice won't work because it's an array of Bytes. Is there a way to convert it to-from, or can I simply remove an array entry from b?

Replies(3)

mentecode

What are you trying to do?

Are you trying to remove a byte? Or add a byte?
Because if it's A, then I think your misunderstanding the purpose of splice().
splice() is a more controllable version of concat(), which joins two arrays together.

As for removing bytes from an array, you can only set it to a new value. You can't make it null.

- MenteCode.

not_55

Re: Remove byte from array?

5 months ago

Looks like you're trying to remove a single byte from a file; you could read the file and write it out to a different file, skipping the required byte...

Pseudo-code...

Get size of file (e.g 2000 bytes) and choose random number R in that range
Read in file a byte at a time and keep count
If counter = R do nothing otherwise write byte out to a different file

Any use?

Edit: Or copy your loaded array to a different array (less the desired byte) and write that out... probably quicker!

prismspecs

Re: Remove byte from array?

5 months ago

Ah, good ideas. Thanks!

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