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  • number several equations with only one number

    - by Tim
    Hi, How can I number several equations in a align environment using only one number? For example \begin{align} w^T x_i + b \geqslant 1-\xi_i \text{ if } y_i=1, \nonumber \\ w^T x_i + b \leqslant -1+\xi_i \text{ if } y_i=-1, \end{align} The numbering will appear next to the second equation. But it would be better if it appears between the lines of the two equations. In this case how to label this group of equations for later referring to? Thanks and regards!

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  • What is the exact problem with multiple inheritance?

    - by Totophil
    I can see people asking all the time whether multiple inheritance should be included into the next version of C# or Java and C++ folks, who are fortunate enough to have this ability, say that this is like giving someone a rope to eventually hang themselves. What’s the matter with the multiple inheritance? Are there any concrete samples?

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  • Release Process Improvements

    - by wallismark
    The process of creating a new build and releasing it to production is a critical step in the SDLC but it is often left as an afterthought and varies greatly from one company to the next. I'm hoping people will share improvements they have made to this process in their organisation so we can all takes steps to 'reduce the pain'. So the question is, specify one painful/time consuming part of your release process and what did you do to improve it? My example: at a previous employer all developers made database changes on one common development database. Then when it came to release time, we used Redgate's SQL Compare to generate a huge script from the differences between the Dev and QA databases. This works reasonably well but the problems with this approach are:- ALL changes in the Dev database are included, some of which may still be 'works in progress'. Sometimes developers made conflicting changes (that were not noticed until the release was in production) It was a time consuming and manual process to create and validate the script (by validate I mean, try to weed out issues like problem 1 and 2). When there were problems with the script (eg the order in which things were run such as creating a record which relies on a foreign key record which is in the script but not yet run) it took time to 'tweak' it so it ran smoothly. It's not an ideal scenario for Continuous Integration. So the solution was:- Enforce a policy of all changes to the database must be scripted. A naming convention was important for ensuring the correct running order of the scripts. Create/Use a tool to run the scripts at release time. Developers had their own copy of the database do develop against (so there was no more 'stepping on each others toes') The next release after we started this process was much faster with fewer problems, indeed the only problems found were due to people 'breaking the rules', eg not creating a script. Once the issues with releasing to QA were fixed, when it came time to release to production it was very smooth. We applied a few other changes (like introducing CI) but this was the most significant, overall we reduced release time from around 3 hours down to a max of 10-15 minutes.

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  • External arrows for jcarousel ?

    - by bob dobbs
    Hi all. I'm creating a slideshow with jcarousel. So far, my slideshow uses most of the defaults for a horizontal slideshow with the tango theme. Can I add an extra "next" and "previous" arrows? I'd like to have them outside of the slideshow container. Is this possible ?

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  • PHP 6.0 - Roadmap?

    - by JustinT
    With the recent announcement that PHP 6 development has been halted, I'm confused as to what the PHP 5.x and 6.x road map includes. The current version of PHP is 5.3.2. There were quite a few significant features to come in PHP 6.0, such as: APC include for automatic bytecode caching Unicode support etc.. Question: What is the new road map of PHP given 6.0 has been canceled? What major features will be available next and in what release?

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  • Sql Server Compact 2005 on Visual Studio 2008

    - by Tim
    I'm working on a Windows Forms application that interacts with a Sql Compact database file created by SQL Server 2005. This application was originally developed in Visual Studio 2005 but was recently converted to a Visual Studio 2008 solution. In regards to Sql Compact, we made sure the references were all still set to the assemblies that handle the 2005 version of Sql Compact rather than Sql Compact 3.5. Having done this, the application still runs just as it should - it will still interact with the Compact database, perform synchronization operations, etc. However, I just discovered today that Visual Studio tools such as the DataSet Designer do not play well with a Sql Compact database file of an older version than 3.5. If I go to the New Connection... wizard, the only Sql Compact Data Source / Data Provider are for Sql Compact 3.5. I assume that Visual Studio 2008 just doesn't include the data provider for the older version of Sql Compact by default. Is there a way you can add the old version of Sql Compact to the list of "Data Sources" for the connection wizard? To see exactly what I'm referring to, click on the Tools menu of Visual Studio 2008 and click Connect to Database... In the window that comes up, click Change... next to the Data source setting. From this dialog there is no way I can select the earlier version of Sql Compact - only 3.5 is available. Maybe I need to add an assembly reference somewhere? Or copy some file(s) from my Visual Studio 2005 directory over to 2008? I would think there would have to be a way for Visual Studio 2008 to be able to interact with a Sql Compact database from Sql Server 2005. To provide one more bit of detail, I discovered this problem when I went to my DataSet, right-clicked and tried to add a TableAdapter. The first screen that comes up says, "Choose Your Data Connection". If I leave it set to the Sql Compact connection that we've always used, I now get the following error when clicking the Next button: Failed to open a connection to the database "The selected database was created with an earlier version of SQL Server Compact and needs to be upgraded to SQL Server Compact 3.5 before the connection can be opened or tested. Upgrade the database by creating a new data connection and completing the Add Connection dialog box." Check the connection and try again. The only problem here is that we still use Sql Server 2005, and if my understanding is correct, it does not produce subscription files that are compatible with Sql Compact 3.5. If I am wrong in this assumption, please correct me. Any help you can provide is greatly appreciated. Thank you.

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  • UIView "suck" animation

    - by igul222
    I'd like to use the UIView "sucking" transition (view is "sucked" into a point) referenced here: http://iphonedevwiki.net/index.php/UIViewAnimationState#Using_suckEffect The method above, however, uses private APIs, which makes it next to useless for an App Store app. How can I recreate a similar effect without relying on private APIs? I'm guessing the answer has to do with OpenGL, although I have zero experience there.

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  • How can I find out if an instance is a MarshalByRef proxy?

    - by Will
    I know there's a way, I know I've done it (a long time) before, but I can't remember or find out how to do it!!! var otherDomain = AppDomain.Create("Lol my memory sucks"); var myRemotableType = typeof(MyTypeThatExtendsMBRO); var proxy = otherDomain .CreateInstanceAndUnwrap( type.Assembly.FullName, type.FullName); // how do you do this next step??? bool isProxy = IsYouIsOrIsYouAintAProxy(proxy);

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  • C# - Getting a RawFraction Performance Counter to show a persistant value

    - by jacko
    I've created a performance counter that shows a fraction of an incremeted value (RawFraction type) over a base value (RawBase). Unfortunately, when monitoring this value, it only shows the percentage when one of the counters is incremented. At all other times it it is sampled, it shows 0. Is there some way to tell the counter to hold onto the last value until the next time it needs to recalculate the fraction?

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  • how to implement more functionality in webpage

    - by trans
    Dear All, I have a website in front page i m displaying 5 records ,for different options,i want that when user licks more he should be able to view next records.i would i keep track as whicg list has already been shown to user,since i m using an arraylist,can i ipmlement it through that.

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  • Is there a fast way to jump to element using XMLReader?

    - by Derk
    I am using XMLReader to read a large XML file with about 1 million elements on the level I am reading from. However, I've calculated it will take over 10 seconds when I jump to -for instance- element 500.000 using XMLReader::next ([ string $localname ] ) or XMLReader::read ( void ) This is not very usable. Is there a faster way to do this?

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  • Maintaining content type pk integrity in a Django deployment

    - by hekevintran
    When you run syncdb in Django, the primary keys of the content types will be recomputed. If I create new models, the next time I run syncdb, the primary keys of the content types will be different. If I have an application running in production, how can I update the database with the new models and keep the integrity of content type pks?

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  • SIMPLE file reading in Perl

    - by Befall
    Hey guys, The other answered questions were a bit complicated for me, as I'm extremely new to using Perl. I'm curious how Perl reads in the files, how to tell it to advance to the next line in the text file, and how to make it read all lines in the .txt file until, for example, it reaches item "banana". Any and all help would be appreciated, thanks!

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  • What web frameworks and languages have the lowest development time?

    - by waitinforatrain
    Hi guys, I'm trying to get a few web development ideas off the ground. Unfortunately I will be the only developer, so I'm focusing on getting a good debuggable, testable setup going that I can develop applications rapidly with. Which languages, development styles and frameworks would you recommend for rapid development? Last time I checked RoR was the next big thing but that was a while back.

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  • What is system() in linux

    - by Satish Patel
    I am an absolute beginner with Linux Operating system and just for fun in terminal I typed system() what happened next is as below: satish@satish-Inspiron-N5010 ~ $ system() >#include<iostream> >int main() bash: syntax error near unexpected token 'int' satish@satish-Ispiron-N5010~ $ Here I want to know that what is system() ? what is it's role here? why I got error in int main() line? What can we do with C/C++ programming in terminal?

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  • Can't connect SQL 2008 Express to Access project

    - by Gerhard
    I just installed SQL 2008 Express and want to create an Access project (ADP). When I get to the Microsoft SQL Server Database Wizard in Access and after clicking on next to create the database I get this message: The new database wizard does not work with the version of Microsoft SQL Server to which you Access project is connected. See the Microsoft Update Web site for the latest information an downloads I can't find any solution to the problem so far. Any ideas why and how to solve this problem?

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  • I have a php form dropdown menu that needs to send information

    - by shinjuo
    I have a dropdown menu that is filled by a mysql database. I need to select one and have it send the information for use on the next page after clicking submit. It does populate the drop down menu like it is supposed to it just does not seem to catch the data on the next page. Here is what I have: removeMain.php <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> </head> <form action="remove.php" method="post"> <?php $link = mysql_connect('********', '********', '*********'); if (!$link){ die('Could not connect: ' . mysql_error()); } mysql_select_db("********", $link); $res = mysql_query("SELECT * FROM cardLists order by cardID") or die(mysql_error()); echo "<select name = CardID>"; while($row=mysql_fetch_assoc($res)) { echo "<option value=$row[ID]>$row[cardID]</a></option>"; } echo "</select>"; ?> Amount to Remove: <input type="text" name="Remove" /> <input type="submit" /> </form> <body> </body> </html> remove.php <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> </head> <body> <?php $link = mysql_connect('*********', '*********', '*********'); if (!$link){ die('Could not connect: ' . mysql_error()); } mysql_select_db("***********y", $link); $query = sprintf("UPDATE cardLists SET AmountLeft = AmountLeft - %s WHERE cardID = '%s'", mysql_real_escape_string($_POST["Remove"]), mysql_real_escape_string($_POST["CardID"])); mysql_query($query); mysql_close($link); ?> <br /> <a href="removeMain.php"> <input type="submit" name="return" id="return" value="Update More" /></a> <a href="index.php"> <input type="submit" name="main" id="main" value="Return To Main" /></a> </body> </html>

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  • Dijkstra's algorithm: why does it work? (not how)

    - by BeeBand
    I understand what Dijkstra's algorithm is but I don't understand why it works. When selecting the next vertice to examine, why does Dijkstra's algorithm select the one with the smallest weight? Why not just select a vertex arbitrarily, since the algorithm visits all vertices anyway?

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  • How do you manipulate form values based off local input?

    - by dmanexe
    I have a form that has a series of check boxes and some line items have a text input next to them that defines quantity of the item. <input type="checkbox" name="measure[][input]" value="<?=$item->id?>"> <input class="item_mult" type="text" name="measure[][input]" /> What is the best way to capture the integer from the input field and have it correspond to the check box so I can use it to calculate the total later on?

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  • replace xml element

    - by snorlaks
    Hello, Im doing something like that: var results = from d in myDocument.Elements().Descendants("myName") select d; foreach (var result in results){ if (sth...){ result.replace(myXElement); } } The problem is that when I replace an element I cant iterate to the next element cause there is null reference. (var result in results). Is there any other way to replace that element with another one and still be able to iterate through that document ? thanks for help

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