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Quines in Processing (Read 1371 times)

st33d

Quines in Processing
May 25^th, 2009, 5:31am

Being particularly bored on a Bank Holiday Monday, I was reading The Daily WTF and discovered what a quine is.

Being something of a fan of Zen I immediately opened up Processing thinking, "this should be a doddle in P5".

A few dead ends and then I then came up with this little number:

Code:


print(join(loadStrings("../sketch_may25a.pde"), ' '));

Then Ctrl-S, Ctrl-R.

As a discussion point and topical excercise for the egg heads, what other quines are possible in P5 The Quine page has a few in Java, but I'm sure Processing could be less verbose.

(And I'm not talking about hitting Ctrl-R with an empty document like this cheeky contest entry)

Rick Junior Member Offline Posts: 78	Re: Quines in Processing Reply #1 - May 25^th, 2009, 8:20am I had thought it'd be cool to see some quines in Processing too. I gave it a try and never came up with anything more complex than your example which I considered kind of a cheat.
	http://r6753.com/ _{I need a job.}

st33d God Member Offline Posts: 666	Re: Quines in Processing Reply #2 - May 25^th, 2009, 8:38am No cheating! Code: String s="String s=;char c=34;print(s.substring(0,9)+c+s+c+s.substring(9));";char c=34;print(s.substring(0,9)+c+s+c+s.substring(9)); (Other than converting the example here.) I'd like to see someone come up with one that printed the output to an applet. That would be in the true spirit of Processing.

Catherine YaBB Newbies Offline Posts: 8	Re: Quines in Processing Reply #3 - May 26^th, 2009, 4:50am hmm... I'm not sure if quines would really be that interesting in processing compared to other languages, since all the quines for Java work in Processing. It would be cool if, in addition to producing its own source, the sketch drew a fractal. Of course, then it wouldn't be a quine.

PhiLho

Re: Quines in Processing
Reply #4 - May 26^th, 2009, 6:34am

Catherine wrote on May 26^th, 2009, 4:50am:

all the quines for Java work in Processing

Not really, Java needs more fluff (main class, main(), etc.)

I made a couple of Quines for Lua long ago, I adapted one for Processing. It was slightly more tricky because we have only one kind of quote.

Quote:

char q = 34, c = 44, n = 10;
String[] a =
{
"char q = 34, c = 44, n = 10;",
"String[] a =",
"{",
"",
"};",
"String B() { String s = new String(); for (int i = 0; i < a.length; i++) { s += q + a[i] + q + c + n; } return s; }",
"void D() { for (int i = 0; i < a.length; i++) println(a[i]); }",
"void setup() { a[3] = B(); D(); exit(); }",

};
String B() { String s = new String(); for (int i = 0; i < a.length; i++) { s += q + a[i] + q + c + n; } return s; }
void D() { for (int i = 0; i < a.length; i++) println(a[i]); }
void setup() { a[3] = B(); D(); exit(); }

PhiLho

Re: Quines in Processing
Reply #5 - May 26^th, 2009, 8:31am

A variant:
Code:

String tk = Character.toString((char) 0x40);
String eol = Character.toString((char) 0x0A);
char[] closingA = { 0x22, 0x20, 0x2B, 0x20, 0x6E, 0x20, 0x2B, 0x0A, 0x22 };
String closing = new String(closingA);
char q = 34, sc = 59, n = 10;
String p =
"String tk = Character.toString((char) 0x40);" + n +
"String eol = Character.toString((char) 0x0A);" + n +
"char[] closingA = { 0x22, 0x20, 0x2B, 0x20, 0x6E, 0x20, 0x2B, 0x0A, 0x22 };" + n +
"String closing = new String(closingA);" + n +
"char q = 34, sc = 59, n = 10;" + n +
"String p =" + n +
"@" + n +
"String fp = q + p.replaceAll(eol, closing) + q + sc;" + n +
"println(p.replace(tk, fp));" + n +
"exit();" + n +
"";
String fp = q + p.replaceAll(eol, closing) + q + sc;
println(p.replace(tk, fp));
exit();

Rick

Re: Quines in Processing
Reply #6 - May 26^th, 2009, 12:56pm

I think I finally got it. Thanks for motivating me guys. It took me a long time to come up with but I like how it turned out. I used Processing to help me write a quine in Processing.

The quine Code:

byte[]a = {112, 114, 105, 110, 116, 40, 34, 98, 121, 116, 101, 91, 93, 97, 32, 61, 32, 123, 34, 32, 43, 32, 106, 111, 105, 110, 40, 115, 116, 114, 40, 97, 41, 44, 32, 34, 44, 32, 34, 41, 32, 43, 32, 34, 125, 59, 34, 32, 43, 32, 34, 92, 110, 34, 32, 43, 32, 106, 111, 105, 110, 40, 115, 116, 114, 40, 99, 104, 97, 114, 40, 97, 41, 41, 44, 34, 34, 41, 32, 43, 32, 34, 92, 110, 101, 120, 105, 116, 40, 41, 59, 34, 41, 59};
print("byte[]a = {" + join(str(a), ", ") + "};" + "\n" + join(str(char(a)),"") + "\nexit();");
exit();

And the helper Code:

String s = "print(\"byte[]a = {\" + join(str(a), \", \") + \"};\" + \"\\n\" + join(str(char(a)),\"\") + \"\\nexit();\");";
for(int a=0; a<s.length(); a++) {
  print(byte(s.charAt(a)) + ", ");
}
print("\n\n" + s);
exit();

Maybe I'll try one that prints to the applet now as st33d suggested.

http://r6753.com/ _{I need a job.}

Rick

Re: Quines in Processing
Reply #7 - May 27^th, 2009, 9:36am

It was easy enough to use the same method to do an applet one. It did get kind of ridiculous though. I would like to see a shorter version.

This Code:

byte[]a =
{118, 111, 105, 100, 32, 115, 101, 116, 117, 112, 40, 41, 32, 123, 10, 32,
32, 115, 105, 122, 101, 40, 52, 48, 48, 44, 56, 48, 48, 41, 59,
10, 32, 32, 80, 70, 111, 110, 116, 32, 102, 111, 110, 116, 32, 61,
32, 99, 114, 101, 97, 116, 101, 70, 111, 110, 116, 40, 34, 65, 114,
105, 97, 108, 34, 44, 32, 49, 48, 44, 32, 102, 97, 108, 115, 101,
41, 59, 10, 32, 32, 116, 101, 120, 116, 70, 111, 110, 116, 40, 102,
111, 110, 116, 41, 59, 10, 125, 10, 118, 111, 105, 100, 32, 100, 114,
97, 119, 40, 41, 32, 123, 10, 32, 32, 83, 116, 114, 105, 110, 103,
32, 115, 32, 61, 32, 34, 34, 59, 10, 32, 32, 115, 32, 43, 61,
32, 34, 98, 121, 116, 101, 91, 93, 97, 32, 61, 92, 110, 123, 34,
59, 10, 32, 32, 102, 111, 114, 40, 105, 110, 116, 32, 105, 61, 48,
59, 32, 105, 60, 97, 46, 108, 101, 110, 103, 116, 104, 59, 32, 105,
43, 43, 41, 32, 123, 10, 32, 32, 32, 32, 115, 32, 43, 61, 32,
97, 91, 105, 93, 59, 10, 32, 32, 32, 32, 105, 102, 40, 105, 33,
61, 97, 46, 108, 101, 110, 103, 116, 104, 45, 49, 41, 32, 115, 32,
43, 61, 32, 34, 44, 32, 34, 59, 10, 32, 32, 32, 32, 105, 102,
40, 105, 33, 61, 48, 32, 38, 38, 32, 105, 37, 49, 53, 61, 61,
48, 41, 32, 115, 32, 43, 61, 32, 34, 92, 110, 34, 59, 10, 32,
32, 125, 10, 32, 32, 115, 32, 43, 61, 32, 34, 125, 59, 92, 110,
34, 59, 10, 32, 32, 115, 32, 43, 61, 32, 106, 111, 105, 110, 40,
115, 116, 114, 40, 99, 104, 97, 114, 40, 97, 41, 41, 44, 34, 34,
41, 59, 10, 32, 32, 116, 101, 120, 116, 40, 115, 44, 32, 49, 48,
44, 32, 50, 48, 41, 59, 10, 125};
void setup() {
  size(400,700);
  PFont font = createFont("Arial", 10, false);
  textFont(font);
}
void draw() {
  String s = "";
  s += "byte[]a =\n{";
  for(int i=0; i<a.length; i++) {
    s += a[i];
    if(i!=a.length-1) s += ", ";
    if(i!=0 && i%15==0) s += "\n";
  }
  s += "};\n";
  s += join(str(char(a)),"");
  text(s, 10, 20);
}

should work if you have Arial. Looks like the forum screws up the formatting but it should be okay when you copy and paste.

http://r6753.com/ _{I need a job.}

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