// jrh asks:
// is this quine a cheat?

{ thisFunction.asCompileString ++ ".value" }.value

// Jens Gulden: 
// this one isn't
// This should be one continuous line of code, but line breaks have been added for ease of reading
{ |a="", b=""| if (a!="", { a ++ "\"" ++ a.escapeChar($\\).escapeChar($\") ++ "\", \"" ++ 
b.escapeChar($\\).escapeChar($\") ++ "\"" ++ b }, { thisFunction.value("{ |a=\"\", b=\"\"| if (a!=\"\", { a ++ \"\\\"\" ++ 
a.escapeChar($\\\\).escapeChar($\\\") ++ \"\\\", \\\"\" ++ b.escapeChar($\\\\).escapeChar($\\\") ++ \"\\\"\" ++ b }, 
{ thisFunction.value(", ") } ) }.value") } ) }.value

// Julian writes
// here is an example of a quine with partial application:
(_ + '.(*' +  quote(_)  + '! 2)').(*"(_ + '.(*' +  quote(_)  + '! 2)')" ! 2)

// the same with normal function syntax:
{|x|  x ++ '.(' ++  quote(x)  ++ ')' }.("{|x| x ++ '.(' ++ quote(x) ++  ')' }")

A quine with surplus

[jrh] translate code to audio (delta times)
and reconvert it to code to reproduce original source code

{|x|
	var dt = 0.00019;
	{
	var num, u, t;
		x = x ++ '.(' ++  quote(x)  ++ ')';
		x.do {|x| num = num.add(x.ascii * dt) };
		u = TDuty.ar(Dseq(num), doneAction:2);
		t = Timer.ar(u);
		SendTrig.ar(u, 0, t);
		u * 0.5
	}.play;
	
	OSCresponder(s.addr, '/tr', { |t,r,msg| (msg[3] / dt).asInteger.asAscii.post }).add;''
	
}.("{|x|
	var dt = 0.00019;
	{
	var num, u, t;
		x = x ++ '.(' ++  quote(x)  ++ ')';
		x.do {|x| num = num.add(x.ascii * dt) };
		u = TDuty.ar(Dseq(num), doneAction:2);
		t = Timer.ar(u);
		SendTrig.ar(u, 0, t);
		u * 0.5
	}.play;
	
	OSCresponder(s.addr, '/tr', { |t,r,msg| (msg[3] / dt).asInteger.asAscii.post }).add;''
	
}")

Some good quine links

• http://www.eleves.ens.fr:8080/home/madore/computers/quine.html A very detailed page about quines
• http://en.wikipedia.org/wiki/Quine Wikipedia Quine Page
• http://c2.com/cgi/wiki?SuperCollider Quines on the C2 wiki
• http://http://www.nyx.net/~gthompso/quine.htm Program Code Poetry
• http://homepage.mac.com/kpreid/quines.html Categorized list of Quines
• http://rohanpm.net/blog/quines-shakespeare-programming-language Quines and obscure programming languages
• http://www.cs.indiana.edu/~tanaka/GEB/quine.html Notes of ome thoughts about quines
• http://www.winface.com/inside/quine.html security and other implications
• http://www.latrobe.edu.au/philosophy/phimvt/joy/jp-reprod.html self replicating programs and lazy lists