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• What are quines? Any specific purpose to have them?

  - by Andriyev

  I came across this term - Quine (also called self-reproducing programs). Just wanted to know more on it. How does one write a quine and are they used anywhere or they are just an exercise for fun? I've started with Python, and I might try writing one in Python. Any suggestions?

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• NSPredicate that is the equivalent of SQL's LIKE

  - by randombits

  I'm looking for a way to use NSPredicate to set a LIKE condition to fetch objects. In addition to that, an OR would be useful as well. I'm trying to do something where if a user searches "James" I can write an NSPredicate that will do the equivalent of: select * from users where firstname LIKE '%James%' OR lastname LIKE '%James%';

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• Twitter/Facebook API for Ruby.

  - by RPK

  I want to write a Ruby application through which: I can submit tweets to twitter. I can submit a post to facebook. I can manage real-time stats of tweets Is there any twitter/facebook api for Ruby?

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• How do I access database from WF4?

  - by Patrol02

  Hi Guys, I host a wcf workflow service within my ASP.NET MVC2 application. I need to be able to load/save data inside my workflow (WF4). How it can be done? Should I just instantiate my Entity Framework context within my activities and read/write? Cheers.

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• How to extend iWork's Number'09 formulas?

  - by Roman Kagan

  I have specific formulas that I'd like to write (in Objective-C perhaps) and integrate with Numbers'09 of Apple's iWork suite and wonder if there is such a way to do so?

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• Class Generator for web services against Java/Android

  - by Jeremy Edwards

  Is there any class generators to process web services in Android/Java? I may have to write my own to generate classes against WSDL but I'm trying not to. Also is there one for REST services as well? If not providing me with discovery service suggestions like disco/wsdl are good enough.

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• Rails debugging rails tasks

  - by SMiX

  Hello. How is it possible to debug rake tasks? When I write debugger it does not start: NoMethodError: undefined method `run_init_script' for Debugger:Module from /usr/local/lib/ruby/gems/1.8/gems/ruby-debug-base-0.10.3/lib/ruby-debug-base.rb:239:in `debugger' from (irb):4 If I run rake my:task --debugger rake returns me to console immediately.

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• Simple "Long Polling" example code?

  - by dbr

  I can find lots of information on how Long Polling works (For example, this, and this), but no simple examples of how to implement this in code. All I can find is cometd, which relies on the Dojo JS framework, and a fairly complex server system.. Basically, how would I use Apache to serve the requests, and how would I write a simple script (say, in PHP) which would "long-poll" the server for new messages? The example doesn't have to be scaleable, secure or complete, it just needs to work!

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• Show milliseconds with Android Chronometer

  - by Matthew Steeples

  I'm looking for a way to make the Chronometer in Android (preferably 1.6 and upwards) show 10ths of a second while counting up. Is it possible to do this? If not, is there a free (and preferably open source) library that does the same? Failing that I'll write my own, but I'd rather use someone else's!

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• How do I get SpecFlow to expect an exception?

  - by Roger Lipscombe

  I'm using SpecFlow, and I'd like to write a scenario such as the following: Scenario: Pressing add with an empty stack throws an exception Given I have entered nothing into the calculator When I press add Then it should throw an exception It's calculator.Add() that's going to throw an exception, so how do I handle this in the method marked [Then]?

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• Javassist annoations problem

  - by Ali

  I'm trying to generate my Entity class using javassist. Everything went well until I added the GeneratedValue annotation to the Id field. The @Id annotation works fine but when I add @GeneeratedValue I get an exception. This is my code: ClassPool cp = ClassPool.getDefault(); CtClass ctClass = cp.makeClass("test.Snake"); ClassFile classFile = ctClass.getClassFile(); classFile.setVersionToJava5(); AnnotationsAttribute attribute = new AnnotationsAttribute(classFile.getConstPool(), AnnotationsAttribute.visibleTag); Annotation idAnnotation = new Annotation(classFile.getConstPool(), ClassPool.getDefault().get("javax.persistence.Id")); attribute.addAnnotation(idAnnotation); Annotation gvAnnotation = new Annotation(classFile.getConstPool(), ClassPool.getDefault().get("javax.persistence.GeneratedValue")); attribute.addAnnotation(gvAnnotation); CtField idField = new CtField(ClassPool.getDefault().get("java.lang.Long"), "id", ctClass); idField.getFieldInfo().addAttribute(attribute); ctClass.addField(idField); CtField nameField = new CtField(ClassPool.getDefault().get("java.lang.String"), "name", ctClass); ctClass.addField(nameField); AnnotationsAttribute attr = new AnnotationsAttribute(classFile.getConstPool(), AnnotationsAttribute.visibleTag); Annotation annotation = new Annotation(classFile.getConstPool(), ClassPool.getDefault().get("javax.persistence.Entity")); attr.addAnnotation(annotation); classFile.addAttribute(attr); snakeClass = ctClass.toClass(); newInstance = snakeClass.newInstance(); And this is the exception I get: java.lang.NullPointerException at javassist.bytecode.ConstPool.getUtf8Info(ConstPool.java:565) at javassist.bytecode.annotation.EnumMemberValue.getValue(EnumMemberValue.java:98) at javassist.bytecode.annotation.EnumMemberValue.write(EnumMemberValue.java:116) at javassist.bytecode.annotation.Annotation.write(Annotation.java:316) at javassist.bytecode.AnnotationsAttribute.setAnnotations(AnnotationsAttribute.java:246) at javassist.bytecode.AnnotationsAttribute.addAnnotation(AnnotationsAttribute.java:211) at ClassLoadingTest.javassitTest(ClassLoadingTest.java:56) It seems to be a problem with @GeneratedValue. When I use it alone whithout id I get this exception either. When I use eclipse debugger to watch variable values, I get get this com.sun.jdi.InvocationException occurred invoking method. instead of the annotation value. but for Id annotation it shows a javassist annotation object. I'm new to javassist. Can anyone help me?

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• openssl api verify the public key matches private key

  - by AC

  How do I write an openssl server that on a single port has two different active RSA private keys? The openssl documentation seems to implies there can only be one rsa private key active at time with in a context. So I was thinking I have two active context, but what is the code to handle figuring out which connection matches which context. Or am I going about this the wrong way.

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• Are there something like Python generators in Ruby?

  - by bodacydo

  I am new to Ruby, is there a way to yield values from Ruby functions? If yes, how? If not, what are my options to write lazy code?

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• separator in string template

  - by Eldeus

  I have the following code in a stringtemplate file: (1) Module $component$ = new Module(new GeometryDescription[] {$shapes;separator=", "$}); which i know is wrong as what I would like is to be able to generate multiple of this line so that when i call Module North = new Module(new GeometryDescription[] {part1,part2}); Module South = new Module(new GeometryDescription[] {part1,part2,part3}); how can i write sentence (1) to be able to do that thanks

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• Help me out in writing REGEX

  - by giri

  Hi I like to know how to write REGEX for the following code. <a href="/search?q=user:111111+[apple]" class="post-tag" title="show all posts by this user in 'apple'">Apple</a><span class="item-multiplier">&times;&nbsp;171</span><br> I just need to fetch Apple from the above source code. Can anybody help me out in writing REGEX. Thanks

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• Regex: how to get contents from tag inner (use javascript)?

  - by lazyanno

  page contents: aa<b>1;2'3</b>hh<b>aaa</b>.. .<b>bbb</b> blabla.. i want to get result: 1;2'3aaabbb match tag is <b> and </b> how to write this regex using javascript? thanks!

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• Convert The Context Free Grammar to LL1 Grammar

  - by kamiar3001

  hi I want to write a program to gives grammar as input and change it to LL1. my problem is converting to LL1 I don't have any algorithm to convert. I earn grammar from some input text by a simple text analyzer but how I can change it to LL1 ? is there any algorithm that is clear to implement.

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• Is there a Max function in SQL Server that takes two values like Math.Max in .NET?

  - by skb

  I want to write a query like this: SELECT o.OrderId, MAX(o.NegotiatedPrice, o.SuggestedPrice) FROM Order o But this isn't how the MAX function works, right? It is an aggregate function so it expects a single parameter and then returns the MAX of all rows. Does anyone know how to do it my way?

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• Does TestNG has runner like SpringJUnit4ClassRunner

  - by Michal Mech

  Hi, When I write tests in JUnit (in Spring context) I usualy do it like this: @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:testContext.xml") public class SimpleTest { @Test public void testMethod() { // execute test logic... } } How can I do the same with TestNG?

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• Generic tree implementation in Java

  - by Ivan

  Is anyone aware of a generic tree (nodes may have multiple children) implementation for Java? It should come from a well trusted source and must be fully tested. It just doesn't seem right implementing it myself. Almost reminds me of my university years when we were supposed to write all our collections ourselves. EDIT: Found this project on java.net, might be worth looking into.

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• Web application vs. web services vs. classic application

  - by Cicik

  Please I need help. I have project in which I need application which communicates with local DB server and simultaneously with central remote DB server to complete some task(read stock quotas from local server create order and then write order to central orders DB,...). So, I don`t know which architecture and technology do this. Web application, .NET WinForms client applications on each computer, or web services based central application with client applications? What are general differences between this approaches? Thanks

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• Operators overloading for enums.

  - by atch

  Is it possible to define operators for enums? For example I have enum Month in my class and I would like to be able to write ++my_month. Thanks

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• gitosis-admin git push failed, exec hooks/post-update

  - by v14nt0

  I'm following this tutorial http://scie.nti.st/2007/11/14/hosting-git-repositories-the-easy-and-secure-way after this step git commit -a -m "Allow jdoe write access to free_monkey" git push i always failed, with this error fatal: exec hooks/post-update failed. this is from my /home/git/repositories/gitosis-admin/hooks/post-update -rwxr-xr-x 1 git git 83 Mar 10 11:49 post-update so i change gitosis.conf manually from server for adding new repositories, and repos can work fine. i've google what might cause it, i want to admin gitosis in proper way Please Help Regards, REV

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• Web form filling using digital writing pads

  - by S Vinoth Kumar

  Hi, I own a website, in which my users will fill a particular for many times in a single day. All i need is i want to give them a digital writing pad, so that they write the content in the pad instead of typing. And i need the written content to get automatically stored in my website form. Will this be possible, if yes how??? Pleas help me on this. Regards Vinoth

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• C# beginner help

  - by ThickBook

  Can you help in this example? I am a beginner. Thanks using System; class Program { public static void Mian(string[] args) { Console.Write("Your Name?: "); string name = Console.Read(); Console.WriteLine("Welcome {0}", name); } }

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