Thursday Code Puzzler: Self Replicating Program
Thursday is code puzzler day here at DZone. The idea is simple: solve the coding problem as efficiently as you can, in any language or framework that you find suitable.
Note: Even though there really is nothing stopping you from finding a solution to this on the internet, try to keep honest, and come up with your own answer. It's all about the participation!
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Write a Self Replicating Program
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Comments
Claude Lalyre replied on Thu, 2012/12/20 - 9:18am
Beware of Java viruses with such challenge...
Matt Cholick replied on Thu, 2012/12/20 - 11:29pm
Groovy:
def p = ''' @Grab(group='commons-lang', module='commons-lang', version='2.4') import static org.apache.commons.lang.RandomStringUtils.randomAlphanumeric File file = new File("${randomAlphanumeric(8)}.groovy").write(p) new GroovyShell(new Binding([p: "def p = ${"'"*3}${p}${"'"*3}; ${p.readLines()[3]}"])).evaluate(p.readLines()[0..2].join(';') as String) '''; new GroovyShell(new Binding([p: "def p = ${"'"*3}${p}${"'"*3}; ${p.readLines()[3]}"])).evaluate(p.readLines()[0..2].join(';') as String)The comment block messes with newline a bit, it's easier to read on Github: https://gist.github.com/4350645
Hari Ravula replied on Fri, 2012/12/21 - 4:46am
in response to:
Matt Cholick
public class SelfPrinting { public static void main(String[] args) { String str = "public class SelfPrinting {\n\tpublic static void main(String[] args) {\n\t\tString str = \"%s\";" + "\n\t\tSystem.out.printf(str, str, str);\n\t}\n}"; System.out.printf(str, str, str); } }