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• monitor table in data base

  - by hatem gamil

  hi all i want to make a web site to act as a monitor to a certain table in data base or act as a listenter on that table eg lets say i have table employees i want to make a web page that listen to changes occurs on that table (all DML operations) whenever a record is inserted i want this page alert me that a "1 row is inserted in table employee",or updated i want to get an alert " row number xx is updated" and so on so what is the best practise to do so thnx

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• Why did Matz choose to make Strings mutable by default in Ruby?

  - by Seth Tisue

  It's the reverse of this question: http://stackoverflow.com/questions/93091/why-cant-strings-be-mutable-in-java-and-net Was this choice made in Ruby only because operations (appends and such) are efficient on mutable strings, or was there some other reason? (If it's only efficiency, that would seem peculiar, since the design of Ruby seems otherwise to not put a high premium on faciliating efficient implementation.)

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• java unload static fields

  - by Alina Danila

  I have a java class that uses complex static fields which need special operations as close() so that they are safely cleaned by GC. For the initialization of static fields I use the static block. But I don't now how to unload the static field safely, so that I can call the close() method before the field is cleaned up by GC. Is there any way to unload a static field, similar to the static initialization block?

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• Why would SET ARITHABORT ON dramatically speed up a query?

  - by Jonathan Allen

  The query is a single select containing a lot of grouping levels and aggragate operations. With SET ARITHABORT ON is takes less than a second, otherwise it takes several minutes. We have seen this behavior on SQL Server 2000 and 2008.

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• Which one can have better performance - LINQ to EF or NHibernate?

  - by masoud ramezani

  I want to start working on a big project. I research about performance issues about LINQ to EF and NHibernate. I want to use one of them as ORM in my project. now my question is that which one of these two ORM can get me better performance in my project? I will use SQL Server 2008 as database and C# as programming language.

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• what are evaluation techniques for HCI projects (without involving users, or psychologist) ?

  - by Patrick

  I'm going to choose a topic for my thesis and it will be a HCI project. (human computer interaction). It will be a research project, and I need to think some kind of evaluation for it. I would prefer to not use human users or having to collaborate with psychologist for it. Is there any metric, or evaluation models I could use instead ? thanks

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• WinService, startup and network

  - by Marco

  I'm writing in .NET a windows service that, at windows startup, executes some network operations. I noticed that my service starts before the network is up. How can I check the network connectivity? Or, better, how can I check if the dhcp gave me an ip?

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• Why are side-effects modeled as monads in Haskell?

  - by bodacydo

  Could anyone give some pointers on why the unpure computations in Haskell are modeled as monads? I mean monad is just an interface with 4 operations, so what was the reasoning as modeling side-effects in it?

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• 3D visualization in browser

  - by Milos

  Hello, I am looking for solutions for 3D visualizations in web browsers. For now I just need to do research about this topic, i.e. I need to know how many solutions exist and which of these are good and why? Thanks

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• linux kernel booting from my bootloader

  - by sp3tsnaz

  hi , i wish to load linux using my own bootloader .. preliminary research and google told me that i ll have to use start_kerne() function .. i want to ask how can i call start_kernel() from assembly .. i have already formatted my usb into ext3 and pasted the compiled kernel there .. now how can i start the linux kernel ? any help is welcome // Thankyou in advance Mohsin .

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• How to play videos in android from assets folder or raw folder??

  - by Abhishek Talwar

  Hey guys I am trying to play a video in android emulator I have the video in my assets folder as well as the raw folder But after doing some research still i cant play video in my emulator i am working on android 2.1 My video format is mp4 so i dont think that should be a problem Could anyone just give me an example code so that i can understand a bit more Thanks guys

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• Enum values doubts?

  - by maddy

  Hi all, Is there any possible way to do any arithmetic operations on enum values enum Type{Zero=0,One,Two,Three,Four,Five,Six,Seven,Eight,Nine}; main() { enum Type Var = Zero; for(int i=0;i<10;i++) { switch(Var) { case Zero: /*do something*/ case One: /*Do something*/ ..... } Var++;(I know that this increment is not possible,But is there anyway by which we can have this variable named Var increment. regards maddy

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• What Java CMIS client library should I use?

  - by Nicolas Raoul

  I am starting a new project and must decide which CMIS client library we will use. Our Java project just needs to connect an a CMIS server (actually Alfresco but it should not matter), in order to perform some read/write/search operations. I am looking for a client library that: is already usable is not going to be abandoned soon has an active community of users is open source Which one would you recommend and why? Here are a few possibilities: Apache Chemistry's OpenCMIS chemistry-atompub-client chemistry-abdera Abdera Parse the XML manually

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• Wordpress databse insert() and update() - using NULL values

  - by pygorex1

  Wordpress ships with the wpdb class which handles CRUD operations. The two methods of this class that I'm interested in are the insert() (the C in CRUD) and update() (the U in CRUD). A problem arises when I want to insert a NULL into a mysql database column - the wpdb class escapes PHP null variables to empty strings. How can I tell Wordpress to use an actual MySQL NULL instead of a MySQL string?

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• YUI TreeView Selection destroyed on recreate.

  - by Nathaniel Flath

  I have a YUI Treeview that allows selection with checkboxes. After some operations, I destroy the tree (with tree.destroy()), and then create a new tree using the same containerID. This new tree should allow selection using checkboxes, but does not. What could be causing this?

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• Is there any working implementation of reverse mode automatic differentiation for Haskell?

  - by Ian Fiske

  The closest-related implementation in Haskell I have seen is the forward mode at http://hackage.haskell.org/packages/archive/fad/1.0/doc/html/Numeric-FAD.html. The closest related related research appears to be reverse mode for another functional language related to Scheme at http://www.bcl.hamilton.ie/~qobi/stalingrad/. I see reverse mode in Haskell as kind of a holy grail for a lot of tasks, with the hopes that it could use Haskell's nested data parallelism to gain a nice speedup in heavy numerical optimization.

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• Creating a Model using Stored Procedures with Zend Framework

  - by jwhat

  I'm using Zend Framework and I'd like to build a model to perform read/write operations on a database... using stored procedures. I know how stored procedures work, but I have yet to use them within Zend Framework. Is there any built in support for stored procedures that I should know about? What is the best practice way to create a model in this senario? Should I extend Zend_Db_Table_Abstract or some other class?

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• What operation type invoked a trigger in SQL Server 2008?

  - by Neil Moss

  I'm contemplating a single SQL trigger to handle INSERT, UPDATE and DELETE operations as part of an auditing process. Is there any statement, function or @@ variable I can interrogate to find out which operation type launched the trigger? I've seen the following pattern: declare @type char(1) if exists (select * from inserted) if exists (select * from deleted) select @Type = 'U' else select @Type = 'I' else select @Type = 'D' but is there anything else a little more direct or explicit? Thanks, Neil.

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• how/resources to compile a procedural language into [sql]

  - by Philip

  I am looking into the possibility/feasibility/resources for building a cross compiler which takes a procedural or Object Oriented language like C, or Java and compiling it into SQL. I understand that the advantage of SQL code is performing set operations which is fundamentally different from procedural languages which generally process 1 at a time. If anyone has done this before, or if it is thought of as too complicated to do or any other ideas/concerns/suggestions would be greatly appreciated. Thanks in advance Philip

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• cifs/samba client library

  - by Reflog

  Hello. I'm looking for some stand alone library to access SMB/CIFS shares. I am not looking for mounting the shares, just browsing and accessing the files for reading. Preferable something with a simple simple API similar to regular POSIX operations of opendir, scandir, read and etc. Thanks in advance!

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• Testing Hibernate with JUnit: "session is closed" exception

  - by Marco

  Hi, sometimes when testing some CRUD operations in my DAO classes using JUnit 4.5, Hibernate throws an exception: org.hibernate.SessionException: Session is closed! The session is not closed explicitly, so what happens? Thanks

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• Handling arbitrarily large integers in dbase language

  - by yatin

  Is there a simple package available that permits programming in xbase ( i.e. dbase or Foxpro syntax) and has a datatype to store and perform simple arithmatical operations on arbitrarily large integers ( say 100,000 decimal digits) ?

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• Java Imaging Framework

  - by Prabhakar

  Is there any Open source or Commercial Java frameworks for doing image operations such as converting the images from one format to other and scaling the images etc. There should be no installation.Set of jars that are in classpath that will do the job. I have looked into the java-image-scaling library but it is having issues. Thanks in advance.

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• HTTP basic authentication using sockets in python

  - by user352958

  How to connect to a server using basic http auth thru sockets in python .I don't want to use urllib/urllib2 etc as my program does some low level socket I/O operations

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• Does access/write to Boolean object needs synchronization

  - by Suraj Chandran

  This may seem a very silly question. Consider this: I have a simple Boolean object with a getter and a setter. Now both of the methods are called from a lot of threads very frequently. Do I need to have a synchronization for this boolean? Also are Boolean assignments atomic operations?

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