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• Genetic programming in c++, library suggestions?

  - by shuttle87

  I'm looking to add some genetic algorithms to an Operations research project I have been involved in. Currently we have a program that aids in optimizing some scheduling and we want to add in some heuristics in the form of genetic algorithms. Are there any good libraries for generic genetic programming/algorithms in c++? Or would you recommend I just code my own? I should add that while I am not new to c++ I am fairly new to doing this sort of mathematical optimization work in c++ as the group I worked with previously had tended to use a proprietary optimization package. We have a fitness function that is fairly computationally intensive to evaluate and we have a cluster to run this on so parallelized code is highly desirable. So is c++ a good language for this? If not please recommend some other ones as I am willing to learn another language if it makes life easier. thanks!

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• Annotation based view mapping

  - by Eqbal

  I am trying to get my head around annotation based mappings and I am having some trouble mapping requests directly to jsp. Do all request have to go through a controller? Is it possible to make it just go to a jsp without declaring a RequestMapping for GET? I am using a InternalResourceViewResolver. Below is my app-servlet.xml <context:annotation-config/> <context:component-scan base-package="com.pioneer.b2broe.web" /> <mvc:annotation-driven /> <mvc:view-controller path="/" view-name="home"/> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:viewClass="org.springframework.web.servlet.view.JstlView" p:suffix=".jsp" p:order="2"/>

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• LaTeX: How to change one of section numbers to a custom letter?

  - by user309937

  Hi, I have something like this: Section 1 ... Section 2 ... Section 3 Subsection 3.1 ... Section 4 ... And I would like to have something like this: Section 1 ... Section 2 ... Section A Subsection A.1 ... Section 4 ... In other words - change one of section numbers to something else 3 == A I need this for my thesis which is written in article class, and when I tired to add appendices the hyperref package broke, and "links" to section 1 directed to appendix A

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• chained msi's/Bootstrapper/prerequisite?

  - by MzTyla

  I have a few component msi packages that need to installed together to form the end application. The problem is: the components that make up the package can be updated and the component relaunched on the http file server.What approach should i take? The installer that i am writing is the 'master' installer. Which needs to be able to read what version of each component is installed on ther client machine in order to perform an upgrade only on that one component. Also if the application is installed for the first time the installer will download and install all required components. I am using Installshield 2009. I have looked into chained MSI's but the master installer is empty. as it needs to be as lightweight as possible. I have no idea how to write a bootstrapper application and my company perfers that i use installshield to write the installer. I have researched - and apparently pre-requisites are not meant to be uninstalled.

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• Extra < using auto complete in Sublime Text 2

  - by ReLeaf

  I installed the All Autocomplete package in my Sublime Text 2 editor and everything works fine except when I type "<div" or something similar, the auto-complete box pops up, I select the one I want and hit enter and it adds "<<div></div>" with an extra "<" in the front of my tag. I have to go back and delete the extra "<" every time...(!) I can't seem to resolve this issue. If I use the command CTRL+Space, the box pops up and I can select the tag I want and it does not include the extra tag but that messes with my flow. Has anyone out there experienced this? Thanks for your help!

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• How can I dial the default connexion on Pocket PC 2003 ?

  - by Jalil

  I am working on a PPC2003 application. The devices on which the application has to run have a modem and VPN connection set. I want to automatically dial the system default "work" connection, which is the VPN one, which dial the modem one first. The user has another application who does automatically make the system dial the default connection. But I can't undertand how to do it from my Compact .NET application. I tried using OpenNETCF net package, but I could not make it work.

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• Looking for some help with GWT/Derby in Eclipse

  - by Ricky

  I'm attempting to learn AJAX via this site. I've made it down to the section where it says "you must put the code in the onModuleLoad()" (right above listing 4). I found two areas in my Eclipse project that mention onModuleLoad(): slicr.java and the actual EntryPoint.class file in the gwt-user.jar/com.google.gwt.core.client package. When I try to add the contents of listing for to slicr.java, I get tons of cannot be resolved to a type errors and I cant add anything to EntryPoint.class as it appears to be locked from editing. I really appreciate any help someone could give me!

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• Flex 4: Defining a XML data model in an Actionscript Class

  - by Steve

  I'm really having a hard time accessing a data model I've defined in an Actionscript class in my Flex app. The following is my AS Class (Model.as): package { import mx.rpc.http.HTTPService; public class Model { private static var _instance:Model; public static function getInstance():Model { if (!_instance) _instance = new Model(); return _instance; } [Bindable] public var xml:mx.rpc.http.HTTPService = new mx.rpc.http.HTTPService(); Model.getInstance().xml.url = "http://127.0.01/RAF/DATAPOINTS.xml"; Model.getInstance().xml.resultFormat = "e4x"; } } I'm then trying to access this in my main application with the following code: Model.getInstance().xml.send(); var sectorList:XMLList = Model.getInstance().xml.lastResult; And it just keeps throwing errors. The errors are generic so I can't determine the source in debugging. Hope this is enough info...

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• Faster way to convert from 24 bit wav pcm format to float?

  - by LMO

  I need to read data in from a wav file in 24 bit pcm format, and convert to float. I'm using Python 2.7.2. The wave package reads the data in as a string, so what I've tried is: # read in entire wav file wdata = f.readframes(nFrames) # unpack into signed integers and convert to float data = array.array('f') for i in range(0,nFrames*3,3): data.append(float(struct.unpack('<i', '\x00'+ wdata[i:i+3])[0])) # normalize sample values data = data / 0x800000 This is quite a bit faster than my earlier approaches, but still quite slow. Can anyone suggest a more efficient method?

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• Replacement for PEAR: MDB2 on PHP 5.3

  - by mattweg

  I've been using pear packages in php for years. I'm in the process of upgrading/moving a sites that uses the MDB2 pear package and it has not been updated for PHP 5.3.X. In 5.3, MDB2 is returning those new annoying errors. Unknown: Assigning the return value of new by reference is deprecated in /usr/local/lib/php/MDB2.php on line 390 I know I can change my error reporting settings to get rid of them, but I'd rather not make any exceptions. Anyway, Is anyone else using MDB2 these days and have a solution? Are there similar database packages you recommend? Thanks. -Matt

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• How can I get my setup.py to use a relative path to my files?

  - by Chris B.

  I'm trying to build a Python distribution with distutils. Unfortunately, my directory structure looks like this: /code /mypackage __init__.py file1.py file2.py /subpackage __init__.py /build setup.py Here's my setup.py file: from distutils.core import setup setup( name = 'MyPackage', description = 'This is my package', packages = ['mypackage', 'mypackage.subpackage'], package_dir = { 'mypackage' : '../mypackage' }, version = '1', url = 'http://www.mypackage.org/', author = 'Me', author_email = '[email protected]', ) When I run python setup.py sdist it correctly generates the manifest file, but doesn't include my source files in the distribution. Apparently, it creates a directory to contain the source files (i.e. mypackage1) then copies each of the source files to mypackage1/../mypackage which puts them outside of the distribution. How can I correct this, without forcing my directory structure to conform to what distutils expects?

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• Simple installer for Visual C# Express 2008

  - by espais

  I am looking for some general feedback here. I have a very simple application that I created in VC# Express 2008, with no special dependencies. Now, I am going to release it as open source, and am curious as to how I should deploy it. Do I need to create an installer package with any dll's? Should I just zip up the *.exe file with a README? Also, how should I go about handling the requirement for the .NET framework that a C# program needs?

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• RPM build process without installing

  - by facha

  I'm trying to build my own rpm package and have a couple of doubts. First of all, in several places I've red that one shouldn't build rpms as root. Why is that? During the building process, rpmbuild has to go through the install stage where it installs files to the system. As far as I understand I can't do that if I'm not root. rpmbuild process finishes with error. So, the question is if it is really possible to build an rpm without installing stuff into the system? Or eventually I do have to become root to complete the build process?

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• Type patterns in Haskell

  - by finnsson

  I'm trying to compile a simple example of generic classes / type patterns (see http://www.haskell.org/ghc/docs/latest/html/users_guide/generic-classes.html) in Haskell but it won't compile. Any ideas about what's wrong with the code would be helpful. According to the documentation there should be a module Generics with the data types Unit, :*:, and :+: but ghc (6.12.1) complaints about Not in scope: data constructor 'Unit' etc. It seems like there's a package instant-generics with the data types :*:, :+: and U but when I import that module (instead of Generics) I get the error Illegal type pattern in the generic bindings {myPrint _ = ""} The complete source code is import Generics.Instant class MyPrint a where myPrint :: a -> String myPrint {| U |} _ = "" myPrint {| a :*: b |} (x :*: y) = "" (show x) ++ ":*:" ++ (show y) myPrint {| a :+: b |} _ = "" data Foo = Foo String instance MyPrint a => MyPrint a main = myPrint $ Foo "hi" and I compile it using ghc --make Foo.hs -fglasgow-exts -XGenerics -XUndecidableInstances P.S. The module Generics export no data types, only the functions: canDoGenerics mkGenericRhs mkTyConGenericBinds validGenericInstanceType validGenericMethodType

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• Swing object: first setText() gets "stuck" when using Mac Java SE 6

  - by Tim

  Hi there, I am a Java newbie trying to maintain an application that works fine under J2SE 5.0 (32- and 64-bit) but has a very specific problem when run under Java SE 6 64-bit: [Tims-MPB:~] tlynch% java -version java version "1.6.0_15" Java(TM) SE Runtime Environment (build 1.6.0_15-b03-226) Java HotSpot(TM) 64-Bit Server VM (build 14.1-b02-92, mixed mode) The application is cross-platform and reportedly works correctly on Java SE 6 under Windows, though I haven't been able to verify that myself. The program uses a JTextField for some text entry and a JLabel to indicate the text to be entered. The first time the showDialog() method is called to set the label text and display the dialog, it works correctly, but subsequent calls all result in the display of the label from the initial invocation rather than the one most recently specified via setText(). public void showDialog(String msgText) { System.out.println("set ChatDialog: " + msgText); jLabel1.setText(msgText); jLabel1.repaint(); // I added this; it didn't help System.out.println("get ChatDialog: " + jLabel1.getText()); super.setVisible(true); } [the full text of the class is provided below] The added printlns validate that expected text is passed to the label's setText() method and is confirmed by retrieving it using getText(), but what shows up on the screen/GUI is always the text from the very first time the method was called for the object. A similar issue is observed with a JTextArea used to label another dialog box. These problem are consistent across multiple Mac systems running Java SE 6 under OS 10.5.x and 10.6.x, but they are never observed when one reverts to J2SE 5.0. If there is some background information pertinent to this problem that I have omitted, please let me know. Any insights or advice appreciated. package gui; import java.awt.*; import java.awt.event.KeyEvent; import javax.swing.*; // Referenced classes of package gui: // MyJPanel, ChatDialog_jTextField1_keyAdapter, WarWindow public class ChatDialog extends JDialog { public ChatDialog(JFrame parent, WarWindow w) { super(parent, true); text = ""; borderLayout1 = new BorderLayout(); jPanel1 = new MyJPanel(); borderLayout2 = new BorderLayout(); jPanel2 = new MyJPanel(); jPanel3 = new MyJPanel(); jLabel1 = new JLabel(); jTextField1 = new JTextField(); warWindow = w; try { jbInit(); } catch(Exception exception) { System.out.println("Problem with ChatDialog init"); exception.printStackTrace(); } return; } public String getText() { return text; } void jTextField1_keyPressed(KeyEvent e) { int id = e.getKeyCode(); switch(id) { case 10: // '\n' text = jTextField1.getText(); setVisible(false); break; } } private void jbInit() throws Exception { setLocation(232, 450); setSize(560, 60); setModal(true); setResizable(false); setUndecorated(true); getContentPane().setLayout(borderLayout1); jPanel1.setLayout(borderLayout2); jPanel2.setMinimumSize(new Dimension(10, 20)); jPanel2.setPreferredSize(new Dimension(10, 20)); jLabel1.setPreferredSize(new Dimension(380, 15)); jLabel1.setHorizontalAlignment(0); jLabel1.setText("Chat Message"); jTextField1.setPreferredSize(new Dimension(520, 21)); jTextField1.setRequestFocusEnabled(false); jTextField1.addKeyListener(new ChatDialog_jTextField1_keyAdapter(this)); getContentPane().add(jPanel1, "Center"); jPanel1.add(jPanel2, "North"); jPanel2.add(jLabel1, null); jPanel1.add(jPanel3, "Center"); jPanel3.add(jTextField1, null); } public void setVisible(boolean b) { jTextField1.setText(""); super.setVisible(b); } public void showDialog(String msgText) { System.out.println("set ChatDialog: " + msgText); jLabel1.setText(msgText); jLabel1.repaint(); // I added this; it didn't help System.out.println("get ChatDialog: " + jLabel1.getText()); super.setVisible(true); } void this_keyPressed(KeyEvent e) { int id = e.getKeyCode(); switch(id) { case 10: // '\n' System.exit(88); break; } } BorderLayout borderLayout1; BorderLayout borderLayout2; JLabel jLabel1; JPanel jPanel1; JPanel jPanel2; JPanel jPanel3; JTextField jTextField1; String text; WarWindow warWindow; }

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• .NET Recaptcha https

  - by TygerKrash

  We've started using the ASP.NET recaptcha control and it works fine. but one of the requirements we have is that all outbound traffic goes over Https. I know that recaptcha supports https, but It's not clear how to configure (or even if it is configurable) when using the ASP.NET plugin option. has anyone got any experience of this? I'll expand a little on what I've found so far.... The Recaptcha package contains 3 public classes RecaptchaControl, RecaptchaValidator and RecaptchaResponse RecaptchaControl is an Asp.NET control, the recaptcha specific methods on there seem to be concerning themes/look and feel. An instance of the Validator has a RemoteIP field (which I presume would represent the verification server), but I can't a way of binding that to the control. RecaptchaResponse seems to more or less represent an enum with possible responses (valid/invalid/failed to connect).

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• How to create a demo version of my software in visual studio using an MSI?

  - by sijith

  How to create a 30 days evaluation software. Is there any possibility to do this with MSI creation. It would be great if MSI installer package provides such in built facility, by which, application expires after fixed trial period. If we going for custom action to do this by writing code, how can i do this. How to Write installation time in some file in installed path or in registry or both. Please give some sample of how to capture time during installation.

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• Solution: Android INSTALL_FAILED_INSUFFICIENT_STORAGE error.

  - by Andrew Smith

  The INSTALL_FAILED_INSUFFICIENT_STORAGE error is the bane of every Android developer's life. It happens regardless of app size, or how much storage is available. Rebooting the target device fixes the problem briefly, but it soon comes back. There are hundreds (if not thousands) of message board posts from people asking why the problem occurs, but the folks at Google are frustratingly silent on the issue. There is a simple workaround. If your test device is running Android 2.2 or later then add the android:installLocation attribute to your application's manifest file, with the value "preferExternal". This will force the app to be installed on the device's external storage, such as a phone's SD card. For example: <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.andrewsmith.android.darkness" android:installLocation="preferExternal" This is more of a band-aid than a fix, and it may not be ideal if you want your finished app to install on the device's internal memory. But it will at least make the development process a lot less frustrating.

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• Android Animate Rotate

  - by oriharel

  I did some digging in Android code, and saw the use of in the indeterminate progress bar. after trying to create my own drawable with this tag: <animated-rotate xmlns:android="http://schemas.android.com/apk/res/android" android:drawable="@drawable/spinner_pia" android:pivotX="50%" android:pivotY="50%" android:framesCount="12" android:frameDuration="100" /> I get an error: "No resource identifier found for attribute 'frameDuration' in package 'android'" - which means that frameDuration is a private attribute. Is there a way to use this "animate-rotate" feature? My task is to replace the system's default indeterminate progress bar. I'd like to do it with as little code as possible (just change few attributes if possible). Using the ProgressBar view, setting: android:indeterminateOnly="true" android:indeterminateBehavior="cycle" android:indeterminateDuration="3500" android:indeterminateDrawable="@drawable/pia_sivuvator" and point "@drawable/pia_sivuvator" to that object would've make my task as elegant as they come but I'm stuck on those private attributes. help?

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• Transferring Data Between Server and Client (Mobile)

  - by Byron

  Scenario: Client (Mobile) - .Net CF 2.0, SQL CE 3.0 Server - .Net 2.0, SQL Server 2005, Web Service Client and Server database schemas differ. From server - only certain columns from certain tables need to be synced. From client - everything will need to be synced once client has made changes. Client will continually poll a web service to download and upload data. A framework will be developed to package and unpackage data, used by both client and server. How would you develop the packaging and unpackaging? Use datasets, serialise strongly typed objects? All suggestions welcome. Thanks

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• Combining Cocoa and MySQL

  - by BryCry

  Hey guys, i was searching SO for help on this, but i can't seem to find a concrete solution. Is, or isn't it possible to connect to a mysql database with Cocoa? Because i'm working on a program that i'd like to extend to a database, but i sure as hell don't know how! I mean, that cocoa-mysql package is heavily outdated, and i dont even know what a C wrapper is! Can someone please tell me how to do this, or atleast burst my bubble to tell me that it can't be done? Thanks!

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• Does malloc() allocate a contiguous block of memory?

  - by user66854

  I have a piece of code written by a very old school programmer :-) . it goes something like this typedef struct ts_request { ts_request_buffer_header_def header; char package[1]; } ts_request_def; ts_request_buffer_def* request_buffer = malloc(sizeof(ts_request_def) + (2 * 1024 * 1024)); the programmer basically is working on a buffer overflow concept. I know the code looks dodgy. so my questions are: Does malloc always allocate contiguous block of memory ?. because in this code if the blocks are not contiguous , the code will fail big time Doing free(request_buffer) , will it free all the bytes allocated by malloc i.e sizeof(ts_request_def) + (2 * 1024 * 1024), or only the bytes of the size of the structure sizeof(ts_request_def) Do you see any evident problems with this approach , i need to discuss this with my boss and would like to point out any loopholes with this approach

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• Methods for making R plots look like Excel plots?

  - by brianjd

  I've been poking around with R graphical parameters trying to make my plots look a little more professional (e.g., las=1, bty="n" usually help). But not quite there. Started playing with tikzDevice. A huge improvement! Amazing how much better things look when the font sizes and styles in the figure match those of the surrounding document. Still, not quite there. What I'm ultimately looking for are those professional gradient shading, rounded corners, and shadow effects found in MS Excel plots. I know they're probably considered chart junk, but I like them. They're just nice looking. Q: How can I get these effects into my R plots? Do people usually just export to Inkscape and doodle over there? It would be nice if there were a literate programming approach. Is there an R package that handles these effects outright?

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• How to use Eclipse and versioning for a matrix of projects

  - by Nulldevice

  Our company develop several software products, which reuse each others packages (we use Java). Every product represented as separate Eclipse Java project and has it's own versioning repository (we use Mercurial). When we find a bug in some shared package, we need to transfer changes to all consuming projects, and this is a hell. The key problem is that Eclipse project can be associated only with one versioning repository. Could someone recommend some way to associate Eclipse Java project whith several versioning repositories which in ideal may be geterogeious (svn, git, mercurial) ?

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• Weak reference and Strong reference

  - by theband

  package uk.co.bigroom.utils { import flash.utils.Dictionary; /** * Class to create a weak reference to an object. A weak reference * is a reference that does not prevent the object from being * garbage collected. If the object has been garbage collected * then the get method will return null. */ public class WeakRef { private var dic:Dictionary; /** * The constructor - creates a weak reference. * * @param obj the object to create a weak reference to */ public function WeakRef( obj:* ) { dic = new Dictionary( true ); dic[obj] = 1; } /** * To get a strong reference to the object. * * @return a strong reference to the object or null if the * object has been garbage collected */ public function get():* { for ( var item:* in dic ) { return item; } return null; } } } In this Class, how they denote one as Weak Reference and one as Strong reference.

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