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• database design: table with large amount of columns (50+) or many sub tables with small amount of co

  - by Guillaume

  In our oroject we already have a lots of tables (100+). Some of them contains a lot of columns (50-100) and we are facing the need of adding more columns from time to time. What do you think is best - from maintenance and performance point of view - to split these huge tables in smaller entities or to keep the tables the way they are ? We are using an ORM tools, so we don't need to write custom request.

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• Why does trying to understand delegates feel like trying to understand the nature of the universe?

  - by Kin

  I've read two books, tons of examples. They still make next to no sense to me. I could probably write some code that uses delegates, but I have no idea why. Am I the only one with this problem, or am I just an idiot? If anyone can actually explain to me when, where, and why I would actually use a delegate, I'll love you forever.

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• is the Main method must needed in java Program?

  - by Praveen Chandrasekaran

  is the main method is must needed to write a java code. this my code : package example; public class HelloWorld { public HelloWorld() { } public String getHelloWorld() { return "Hello From Java!"; } } it shows error at compilation : java.lang.NoSuchMethodError: main Exception in thread "main"

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• Running VB & C# programs in Ubuntu

  - by Arjun Vasudevan

  I've run the following command in the Ubuntu terminal - sudo apt-get install mono-develop Now how can I run *.vb and *.cs programs using the terminal - What is the command that need to be given? Does the syntax vary when we write code in Windows & Linux environment?

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• How to create web pages or program with LaTeX math style?

  - by Sorush Rabiee

  I just wondering, how can write web applications or web pages using LaTeX-styled math? please don't refer to LaTeX2png. i want a text formation tool or script, like mathoverflow. Thanks.

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• Make sure bad patterns don't come back after refactoring

  - by Let_Me_Be

  I'm refactoring an old C code. The code has absolutely no layered architecture (everything is being accessed by everything) and I'm trying to change that. I would like to cut direct access to structure members (at least write for now) and only allow access through access functions. Is there some tool (or perhaps directly the compiler) that could check this rule for me? I need this since I'm maintaining a fork and the upstream isn't very concerned with code quality.

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• Override jre_lib classes

  - by Filip

  What is the best way to override jre_lib classes? Let's say I need to store all ArrayLists not in RAM but on disk or anywhere else. I wanna write my own ArrayList class to code this functionality and make sure that every instantiations of ArrayList use my class. I thought about class loading mechanism to change order of classpath, but as I see java checks standard classes first.

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• What are the tell-tale signs that my code needs to make use of multi-threading?

  - by dotnetdev

  Hi, I am using a third party API which performs what I would assume are expensive operations in terms of time/resources used (image recognition, etc). What tell-tale signs are there that the code under test should be made to use threads to increase performance? I have a profiler and will be profiling the code I write which will rely on this API. Thanks

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• what is the most elegant way in ruby to remove a parameter from url?

  - by dimus

  I would like to take out a parameter from url by it's name without knowing if it is the first, middle or last parameter and reassemble url again. I guess it is not that hard to write something on my own using CGI or URI, but I imagine such functionality exists already. Any suggestions? in: http://example.com/path?param1=one&param2=2&param3=something3 out: http://example.com/path?param2=2&param3=something3

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• Can Google Forms do carriage returns/ line feed

  - by Simon

  I am trying to write a pre-qualification programming exam, hopefully using Google Forms... however they seem to be unable to do new-lines in both the questions and the section headers... My current format is new page for each question, with a "section header" as the main question (because it has a textarea for the "code snippet") and a "multiple choice question" as the ummm... question answer... Help much appreciated...

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• How do I create a deb package with basic dependencies?

  - by Sam

  Hi so I am trying to create a deb package for a web application written in Java (it uses Apache Tomcat). My eventual goal is to start a repository that people can add to apt-get the software, but How do I make it so that the package knows to look for dependencies like tomcat, sun-java6-bin, and ant? How do I write an installer script to place the files and folders in the right place?

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• Is there way to determine if a file has been executed or not in C#?

  - by Shane

  I'm looking for a way to determine if a file has been executed or not. I've looked a bit into FileInfo's LastAccessTime but this doesn't seem to change when a file is executed. I've also looked into FileSystemWatcher but this also doesn't seem to offer a solution. Is there such a thing as a file execution listener or is there another way? If it helps, i'm looking to write a folder listener that renames an .avi file within it after it has been watched/executed.

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• ASP.NET TextBox Control with count back function from the limit

  - by uzay95

  Is there any textbox comoponent(control) which is counting back from the maxlength? I can write it but i would like to find a control which has this function.

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• how to loop through an array of vectors in C#

  - by Robert

  Hello everyone,I now have an array of vectors: static Vector3[] axes = new Vector3[] { Vector3.UnitX, Vector3.UnitY, Vector3.UnitZ }; and I want to loop through it,the code I write is: for(int i=0;i<axes.Length;i++) { do sth. about axes[i]; } However,it doesnt work and gets into infinite loop,could anyone help? thx.

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• Access check on folder in java

  - by Bhaskar

  I'm using the following code to check the access on selected folder. but it's not working. private boolean writeAccess(String path){ try { AccessController.checkPermission(new FilePermission(path, "read,write"));/*,*/ // Has permission return true; } catch (SecurityException e) { // Does not have permission return false; } } wt is prblm in it. and is there any other options to check the existance and access on the folders/directories?

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• Accessing the database and sending an email in a symfony batch script

  - by morpheous

  I am running Symfony 1.3.2 on Ubuntu. I need to write a batch script that can: Access the database using the ORM Send email(s) IIRC, this was in a previous cookback, but I thing that was for an earlier version of Symfony (the API may have changed since). Does anyone know how I may access the database via the ORM layer in a batch script and also how to send out email(s) in a batch script?

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• How does one go about writing a virtual MIDI interface?

  - by Alex

  I want to do some funky things with controlling MIDI streams, and I'd like to be able to pipe MIDI input into an application like Ableton or Reason. Presumably this involves some sort of driver level work? Ultimately I'd like to write my application in Python, so if there is some Python-based solution, I'd consider it. I'm perfectly fine with using C/C++, though, so that's not a problem.

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• script to sum all numbers in a file (linux)

  - by Mark Roberts

  I have a file which contains several thousand numbers, each on it's own line: 34 42 11 6 2 99 ... I'm looking to write a script which will print the sum of all numbers in the file. I've got a solution, but it's not very efficient. (It takes several minutes to run.) I'm looking for a more efficient solution. Any suggestions?

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• Set Positions returns E_NOTIMPL

  - by Manish

  Hi, I want to write only a specific portion of a .avi file in the output .avi file .For this I follow Source Filter -Avi mux-File Writer.I try to use IMediaSeeking on the Mux to set the specific start and stop times using Set Positions but it returns E_NOTIMPL. I also try to query the graph builder for IMediaSeeking and try to set the start and stop positions with no success.Can someone help?

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• Question on XJB

  - by Hima

  I have two tables -- INSTALL_BUILD_RESULTS and BUILD_RESULTS. IBR has a primary key called Install_Build_Id and BR has a primary key called Build_Id. Both are numbers A third table, LINK_BUILD_TO_INSTALL_BUILD is a table simply consisting of the two columns mentioned above, used together as a composite key. How can I write an xjb for these 3 tables.

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• Writing PDF reader Library

  - by Stefano

  I have searched for PDF reader library that is licenced under LGPL or the like but could not find. I found only GPLs. Now I need a help to write my own library to read the PDF file and display it in my app. I have downloaded PDF Specs 1.7 from Adobe and I'm trying to search out a beginner tutorial but I'm yet to find one. Is there a beginner tutorial for writing my own reader library (only reader)? Thanks

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• onclick event in combo box

  - by raam

  function ram(){ document.write("Hello World!") alert("ok"); } India Autralia England Ameriaca Pakistan In this above code the event will not fire for combo box ..i try by using focus and click event....i can i do this....and i want 1 more thing if i select combo box value as India,i want to create a combo box with state(elements are TN,DL..) updation...

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• Cocoa touch: decorating text

  - by user365904

  I've added a UIAppFont to my plist, and, happily, am able to write a custom font to my display. Now, if I had to display this custom font in a very large size with a yellow outline and purple in the middle- how in the world would I achieve that??

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• Is there a template engine for Node.js?

  - by Seb

  I'm kind of falling in love with Node.js not because you write app code in javascript but because of its performance. I really don't care a lot about how beautiful a server side language might be but how much requests per second it can handle. So anyway I'm looking forward to experiment building an entire webapp using Node.js (and going back to the actual question) is there a template engine similar to let's say the django template engine or something similar (that at least allows you to extend base templates) available for Node.js?

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• iphone, need to put many text boxes on the view, how to scroll down to view more content?

  - by Siegfried

  iphone, need to put many text boxes on the view, how to scroll down to view more content? I actually put buttons and labels on the ScrollView, but the scrolling doesn't work. Do I need to write any code for that, any example? Thanks.

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