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• System of linear equations in C++?

  - by Archagon

  I need to solve a system of linear equations in my program. Is there a simple linear algebra library for C++, preferably comprised of no more than a few headers? I've been looking for nearly an hour, and all the ones I found require messing around with Linux, compiling DLLs in MinGW, etc. etc. etc. (I'm using Visual Studio 2008.)

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• Progress bar in Java

  - by user161004

  I have got a form in Java (Swing) loading large amount of data from the database. I want to display a progress bar while the program gets actually loaded. How can i do it??

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• How do you develop Java Servlets using Eclipse?

  - by Y Pgjn

  I would like to program Java servlets using Eclipse and I plan on deploying them using Tomcat. I think I can build the projects using Ant which is bundled with Eclipse. I have the standard Eclipse IDE. What options do I have for doing Servlet development in Eclipse? What changes do I need to make to Eclipse? Do I need to install a plug-in?

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• HARD CODED PATHS IN C#

  - by maya

  Hai I am developing an application in C#.I have a folde called myfolder it contains a file called mypoints.bmp.the folder myfolder is in my project folder it is in D drive .the path is D:\Myproject\myfolder\mypoints.bmp Now in my program whereever i need mypoints.bmp i hardcoded the wholw path.when my project is copied in to a different system under C drive i am not able to run mu project because of the hardcoded path.HOw can i give the path so that there will not be any problem evenif it is loaded in to a different system under a different drive.Please help. THAnks maya

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• unsort Hashtable

  - by user222820

  hi there i am writing a program in C# i have a code like this Hashtable ht = new Hashtable(); ht.Add("1", "One"); ht.Add("2", "Two"); ht.Add("3", "Three"); ht.Add("4", "Four"); but Compiler sort it i wanna know how can i prevent sorting hashtable please help me

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• How to show why "try" failed in python

  - by calccrypto

  is there anyway to show why a "try" failed, and skipped to "except", without writing out all the possible errors by hand, and without ending the program? example: try: 1/0 except: someway to show "Traceback (most recent call last): File "<pyshell#0>", line 1, in <module> 1/0 ZeroDivisionError: integer division or modulo by zero" i dont want to doif:print error 1, elif: print error 2, elif: etc.... i want to see the error that would be shown had try not been there

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• PyGTK: How do I make a custom widget look like a gtk.Notebook tab?

  - by Ben Ashton

  Hi, I'm writing a program and I need some extra functionality from the gtk.Notebook widget, so I have taken to creating my own. My only problem is styling my tabs so that they look like the tabs in gtk.Notebook and will change according to the user's theme. I really don't know where to start so any advice would be much appreciated, thanks :)

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• Using Scala array from java

  - by Grégoire

  Hi I'm trying to use some library code written in scala from a java program. I have a function that returns an Array (a scala Array) and I thought it would be possible to do Tree[] = ScalaObject.myScalaFunction() But the I get this error : [error] found : scala.runtime.BoxedArray [error] required: org.grammaticalframework.Trees.Absyn.Tree[] What is the correct way to use a scala array in java ?

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• Hibernate @DiscriminatorColumn and @DiscriminatorValue issue

  - by user224270

  I have this parent class: @Entity @Inheritance(strategy = InheritanceType.JOINED) @Table(name = "BSEntity") @DiscriminatorColumn(name = "resourceType", discriminatorType = DiscriminatorType.STRING, length = 32) public abstract class BaseEntity { and the subclass @Entity @Table(name = "BSCategory") @DiscriminatorValue("Category") public class CategoryEntity extends BaseEntity { But when I run the program, I get the following error: 2010-06-03 10:13:54,222 [main] WARN (org.hibernate.util.JDBCExceptionReporter:100) - SQL Error: 1364, SQLState: HY000 2010-06-03 10:13:54,222 [main] ERROR (org.hibernate.util.JDBCExceptionReporter:101) - Field 'resourceType' doesn't have a default value Any thoughts? Updated: Database is MySQL. I have also changed inheritance strategy to JOINED instead of SINGLE_TABLE. Help

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• Controlling the fan speed and detecting the inside temperature of the pc with python?

  - by terabytest

  Hello. Since my pc's fan is very loud, I'd like to make myself a program to "shut it up" when it's not required to be running at full speed. I want to make it with python, so is there any module that can detect the temperature and/or set the fan speed?

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• How to use fgets if you dont know the number of characters to be read.

  - by vette982

  I need to read a file and send the text from it to a string so I can parse it. However, the program won't know exactly how long the file is so what would I do if I wanted to use fgets, or is there a better alternative? Note: char * fgets ( char * str, int num, FILE * stream );

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• On null pointer arg, better to crash or throw exception?

  - by paz

  What is the preferred way to handle a null pointer passed in as an output argument to a function? I could ASSERT but I feel like its not good to let a library crash the program. Instead, I was thinking about using exceptions.

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• Visual Studio Question: How to go to a specific file path and line number programmatically?

  - by Jack

  In the Visual Studio output window, you can double click a line that contains a file path and line number and it automatically takes you to that location. In my program, I need to mimic this behavior and be able to click something (a button for example) and do go to a specific file and line number that I tell it to go to. Any help/suggestions would be appreciated. I am working in C#.

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• Copying sectors?

  - by baltusaj

  Is there a script i can use to copy some particular sectors of my Harddisk? I actually have two partitions say A and B, on my Harddisk. Both are of same sizes. What i want is to run a program which starts copying data from the starting sector of A to the starting sector of B until the end sector of A is copied to the end sector of B. Looking for possible solutions... Thanks a lot

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• Best language for scripting large scale file management

  - by Dan

  The National Park Service's Natural Sounds Program collects multiple terabytes of data each year measuring soundscapes. In your opinion, what is best available scripting language to manage massive amounts of files and file types? We would like to easily design and run efficient user-friendly scripts to search for and retrieve/create copies of files that may be located in different directories according a single static hierarchy. The OS will most likely be windows. Thanks!

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• Can you bundle a JavaFX jar as an OS X application?

  - by Ianprime0509

  I'm looking for a way to bundle JavaFX applications similarly to the way I can bundle Java applications using Jar Bundler? I really would like to have a custom icon for my program(and the ability to pin it to the Dock). Is there a way to do this now, or do I have to wait for JavaFX to mature in the Java market?

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• Anyone know of a Snippet or File Repository Application in PHP?

  - by Shellcode

  I am looking to start a community based on user posted scripts such as bashrc, screenrc, aliases, etc. Does anyone know of a web application in PHP that would do that? I am not looking for a snippet program, or a link directory. Users can store linux/UNIX/Windows configuration files, as well as maybe an option to attach a screenshot.

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• Parse error in application web.xml

  - by saloni

  I am making a simple servlet program and when i started my tomcat I m getting the error "java.lang.IllegalArgumentException:" and Parse error in application web.xml. and in web.xml http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" sample Samplelass SampleClass SampleClass /sample sample/page/form.jsp

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• Which Java Telnet or openSSH library?

  - by markovuksanovic

  I need to make a small test program in java which has to communicate with remote Windows server using telnet, or openSSH. Which library would you suggest to use? I'd like to use a well documented and stable library.

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• gethostbyname replacement for IPv6 addresses

  - by rursw1

  Hi, I have a program that uses gethostbyname (in Windows) in order to convert IP address to hostname. But, it works only for IPv4... What is the correct replacement for IPv6? Thanks.

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• Planning a database app

  - by ChrisC

  I am in the planning stages of a database app for personal use. I have a good bit of the database structure planned, but as I think about how I'm going to write the program, it made me wonder if I'm doing this in the right order. Which should I be planning first, the db structure or the classes?

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• iPhone init method return type

  - by William Jockusch

  Suppose we are writing a class (let's call it Class) in an iPhone program. In all the samples out there, the init methods are typically declared like this: -(id) initWithFoo: (Foo *) foo My question is: would it be more logical to do the following? Why or why not? -(Class *) initWithFoo: (Foo *) foo

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• How I redirect python stdout to C stdin using pipelines in linux

  - by Robinson

  I have a python script and I want to use the output of it to be the input of other C program. I want to use pipelines, sintax would be: python_script.py | C_program but I don't know how to redirect the pythons stdout to C stdin

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• What programming language is this?

  - by Hutch

  We're trying to script a CAD program, and this is the example for controlling the date in our design slugs, but I don't even know what language it is to know what to do with it. ! LIBEDATE def &d$ &ret$ set &d$ = rstr(`/`,` `,#d$); set &ret$ = word(&d$,2),`/`,word(&d$,1),`/`,subs(word(&d$,3), -2, 2)

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• Java - when to use notify or notifyAll?

  - by mdma

  Why does java.lang.Object have two notify methods - notify and notifyAll? It seems that notifyAll does at least everything notify does, so why not just use notifyAll all the time? If notifyAll is used instead of notify, is the program still correct, and vice versa? What influences the choice between these two methods?

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