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  • SVN update a working copy when parents are updated

    - by ruckuus
    I have two SVN branches and I plan to partially copy the first working copy to another. I did this: Libs /home/user/projects/libs/{lib1, lib2, lib3} Core /home/user/projects/Apps/{libs,core} svn copy --parents /home/user/projects/libs/lib1/* /home/user/projects/Apps/libs/1 svn copy --parents /home/user/projects/libs/lib2/* /home/user/projects/Apps/libs/2 svn copy --parents /home/user/projects/libs/lib3/* /home/user/projects/Apps/libs/3 The question: My peers are still working on /home/user/projects/libs/lib1, and when this repository is updated with new codes, I want my /home/user/projects/Apps/libs also updated. Is there any way to do that "automatically"? I tried to do with the same svn copy command, and of course it fails with: svn: Path '/home/user/projects/Apps/libs/1' already exists

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  • Regular Expressions Cookbook Is in The Money—Win a Copy

    - by Jan Goyvaerts
    %COOKBOOKFRAME%You may have heard some people say that most book authors never get any royalties. That’s not true because most authors get an advance royalty that is paid before the book is published. That’s the author’s main incentive for writing the book, at least as far as money is concerned. (If money is your main concern, don’t write books.) What is true is that most authors never see any money beyond the advance royalty. Royalty rates are very low. A 10% royalty of the publisher’s price is considered normal. The publisher’s price is usually 45% of the retail price. So if you pay full price in a bookstore, the author gets 4.5% of your money. If there’s more than one author, they split the royalty. It doesn’t take a math degree to figure out that a book needs to sell quite a few copies for the royalty to add up to a meaningful amount of money. But Steven and I must have done something right. Regular Expressions Cookbook is in the money. My royalty statement for the 3rd quartier of 2009, which is the 2nd quarter that the book was on the market, came with a check. I actually received it last month but didn’t get around to blogging about. The amount of the check is insignificant. The point is that the balance is no longer negative. I’m taking this opportunity to pat myself and my co-author on the back. To celebrate the occassion O’Reilly has offered to sponsor a give-away of five (5) copies of Regular Expressions Cookbook. These are the rules of the game: You must post a comment to this blog article including your actual name and actual email address. Names are published, email addresses are not. Comments are moderated by myself (Jan Goyvaerts). If I consider a comment to be offensive or spam it will not be published and not be eligible for any prize. If you don’t know what to say in the comment, just wish me a happy 100000nd birthday, so I don’t have to feel so bad about entering the 6-bit era. Each person commenting has only one chance to win, regardless of the number of comments posted. O’Reilly will be provided with the names and email addresses of the winners (and those email addresses only) in order to arrange delivery. Each winner can choose to receive a printed copy or ebook (DRM-free PDF). If you choose the printed book, O’Reilly pays for shipping to anywhere in the world but not for any duties or taxes your country may impose on books imported from the USA. If you choose the ebook, you’ll need to create an O’Reilly account that is then granted access to the PDF download. You can make your choice after you’ve won, so it doesn’t influence your chance of winning. Contest ends 28 February 2010, GMT+7 (Thai time). Chosen by five calls to Random(78)+1 in Delphi 2010, the winners are: 48: Xiaozu 45: David Chisholm 19: Miquel Burns 33: Aaron Rice 17: David Laing Thanks to everybody who participated. The winners have been notified by email on how to collect their prize.

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  • What’s the use of code reuse?

    - by Tony Davis
    All great developers write reusable code, don’t they? Well, maybe, but as with all statements regarding what “great” developers do or don’t do, it’s probably an over-simplification. A novice programmer, in particular, will encounter in the literature a general assumption of the importance of code reusability. They spend time worrying about DRY (don’t repeat yourself), moving logic into specific “helper” modules that they can then reuse, agonizing about the minutiae of the class structure, inheritance and interface design that will promote easy reuse. Unfortunately, writing code specifically for reuse often leads to complicated object hierarchies and inheritance models that are anything but reusable. If, instead, one strives to write simple code units that are highly maintainable and perform a single function, in a concise, isolated fashion then the potential for reuse simply “drops out” as a natural by-product. Programmers, of course, care about these principles, about encapsulation and clean interfaces that don’t expose inner workings and allow easy pluggability. This is great when it helps with the maintenance and development of code but how often, in practice, do we actually reuse our code? Most DBAs and database developers are familiar with the practical reasons for the limited opportunities to reuse database code and its potential downsides. However, surely elsewhere in our code base, reuse happens often. After all, we can all name examples, such as date/time handling modules, which if we write with enough care we can plug in to many places. I spoke to a developer just yesterday who looked me in the eye and told me that in 30+ years as a developer (a successful one, I’d add), he’d never once reused his own code. As I sat blinking in disbelief, he explained that, of course, he always thought he would reuse it. He’d often agonized over its design, certain that he was creating code of great significance that he and other generations would reuse, with grateful tears misting their eyes. In fact, it never happened. He had in his head, most of the algorithms he needed and would simply write the code from scratch each time, refining the algorithms and tailoring the code to meet the specific requirements. It was, he said, simply quicker to do that than dig out the old code, check it, correct the mistakes, and adapt it. Is this a common experience, or just a strange anomaly? Viewed in a certain light, building code with a focus on reusability seems to hark to a past age where people built cars and music systems with the idea that someone else could and would replace and reuse the parts. Technology advances so rapidly that the next time you need the “same” code, it’s likely a new technique, or a whole new language, has emerged in the meantime, better equipped to tackle the task. Maybe we should be less fearful of the idea that we could write code well suited to the system requirements, but with little regard for reuse potential, and then rewrite a better version from scratch the next time.

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  • Word is ignoring my 'Match Destination Formatting' preference when pasting text

    - by CreeDorofl
    I'm stuck using word 2007 at the office. It has options for retaining formatting, pasting as plain text, and pasting text to match the destination's formatting. That last option is the one I want, but word is blatantly ignoring it. I copy some text from a PDF, paste into word, and it retains the PDF's formatting... even though I went into options -- advanced -- changed all the dropdowns to "Match Destination Formatting". It also ignores "text only" option... It retains the exact mix of bold, italic, normal text & fonts. I can work around it by pasting to a plain text file, then pasting into word. Or I can do paste special -- unformatted text. But this is so irritating... I just want to ctrl+V and not hassle with it every single time. Is there a better fix?

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  • Is my external hard drive dying?

    - by thatotherguy
    I keep getting this error lately when I try to copy large (200+ MB) files over to my external. Following this, the disk becomes unresponsive and I got to unplug it and plug it in again to work. The copy process also is unreasonably slow. It is worth noting that this happens on Windows too, so it's not the notorious "Error -36" bug OS X had prior to 10.6.3. The disk is a Western Digital 3200BMV. Any ideas?

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  • Integrating Code Metrics in TFS 2010 Build

    - by Jakob Ehn
    The build process template and custom activity described in this post is available here: http://cid-ee034c9f620cd58d.office.live.com/self.aspx/BlogSamples/CodeMetricsSample.zip Running code metrics has been available since VS 2008, but only from inside the IDE. Yesterday Microsoft finally releases a Visual Studio Code Metrics Power Tool 10.0, a command line tool that lets you run code metrics on your applications.  This means that it is now possible to perform code metrics analysis on the build server as part of your nightly/QA builds (for example). In this post I will show how you can run the metrics command line tool, and also a custom activity that reads the output and appends the results to the build log, and also fails he build if the metric values exceeds certain (configurable) treshold values. The code metrics tool analyzes all the methods in the assemblies, measuring cyclomatic complexity, class coupling, depth of inheritance and lines of code. Then it calculates a Maintainability Index from these values that is a measure f how maintanable this method is, between 0 (worst) and 100 (best). For information on hwo this value is calculated, see http://blogs.msdn.com/b/codeanalysis/archive/2007/11/20/maintainability-index-range-and-meaning.aspx. After this it aggregates the information and present it at the class, namespace and module level as well. Running Metrics.exe in a build definition Running the actual tool is easy, just use a InvokeProcess activity last in the Compile the Project sequence, reference the metrics.exe file and pass the correct arguments and you will end up with a result XML file in the drop directory. Here is how it is done in the attached build process template: In the above sequence I first assign the path to the code metrics result file ([BinariesDirectory]\result.xml) to a variable called MetricsResultFile, which is then sent to the InvokeProcess activity in the Arguments property. Here are the arguments for the InvokeProcess activity: Note that we tell metrics.exe to analyze all assemblies located in the Binaries folder. You might want to do some more intelligent filtering here, you probably don’t want to analyze all 3rd party assemblies for example. Note also the path to the metrics.exe, this is the default location when you install the Code Metrics power tool. You must of course install the power tool on all build servers. Using the standard output logging (in the Handle Standard Output/Handle Error Output sections), we get the following output when running the build: Integrating Code Metrics into the build Having the results available next to the build result is nice, but we want to have results integrated in the build result itself, and also to affect the outcome of the build. The point of having QA builds that measure, for example, code metrics is to make it very clear how the code being built measures up to the standards of the project/company. Just having a XML file available in the drop location will not cause the developers to improve their code, but a (partially) failing build will! To do this, we need to write a custom activity that parses the metrics result file, logs it to the build log and fails the build if the values frfom the metrics is below/above some predefined treshold values. The custom activity performs the following steps Parses the XML. I’m using Linq 2 XSD for this, since the XML schema for the result file is available, it is vey easy to generate code that lets you query the structure using standard Linq operators. Runs through the metric result hierarchy and logs the metrics for each level and also verifies maintainability index and the cyclomatic complexity with the treshold values. The treshold values are defined in the build process template are are sent in as arguments to the custom activity If the treshold values are exceeded, the activity either fails or partially fails the current build. For more information about the structure of the code metrics result file, read Cameron Skinner's post about it. It is very simpe and easy to understand. I won’t go through the code of the custom activity here, since there is nothing special about it and it is available for download so you can look at it and play with it yourself. The treshold values for Maintainability Index and Cyclomatic Complexity is defined in the build process template, and can be modified per build definition: I have taken the default value for these settings from my colleague Terje Sandström post on Code Metrics - suggestions for approriate limits. You’ll notice that this is quite an improvement compared to using code metrics inside the IDE, where Red/Yellow/Green limits are fixed (and the default values are somewaht strange, see Terjes post for a discussion on this) This is the first version of the code metrics integration with TFS 2010 Build, I will proabably enhance the functionality and the logging (the “tree view” structure in the log becomes quite hard to read) soon. I will also consider adding it to the Community TFS Build Extensions site when it becomes a bit more mature. Another obvious improvement is to extend the data warehouse of TFS and push the metric results back to the warehouse and make it visible in the reports.

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  • GPL'ing code of a third party?

    - by Mark
    I am facing the following dilemma at the moment. I am using code from a scientific paper in a commercial project. So basically I copied and pasted the code from the paper's pdf into my code editor and use it in my own code. The code in the paper does not have any copy restrictions or license(like the GPL) so I thought I would be ok using it in a commercial project. However, I have seen several gpl licensed open source projects that use the exact same code from the paper to the point of having the same variable names like in the paper. So what happened here is that a gpl license was put on a third parties non gpl'ed code. Are these open source projects in violation of the gpl or would I be in violation of the gpl because I use code which has been gpl'ed? My common sense tells me it is not allowed to gpl somebody elses non-gpl'ed (like in this case from the paper) code but I though I would ask anyway.

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  • Is there a way to check if redistributed code has been altered?

    - by onlineapplab.com
    I would like to redistribute my app (PHP) in a way that the user gets the front end (presentation) layer which is using the API on my server through a web service. I want the user to be able to alter his part of the app but at the same time exclude such altered app from the normal support and offer support on pay by the hour basis. Is there a way to check if the source code was altered? Only solution I can think of would be to get check sums of all the files then send it through my API and compare them with the original app. Is there any more secure way to do it so it would be harder for the user to break such protection?

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  • "// ..." comments at end of code block after } - good or bad?

    - by gablin
    I've often seen such comments be used: function foo() { ... } // foo while (...) { ... } // while if (...) { ... } // if and sometimes even as far as if (condition) { ... } // if (condition) I've never understood this practice and thus never applied it. If your code is so long that you need to know what this ending } is then perhaps you should consider splitting it up into separate functions. Also, most developers tools are able to jump to the matching bracket. And finally the last is, for me, a clear violation to the DRY principle; if you change the condition you would have to remember to change the comment as well (or else it could get messy for the maintainer, or even for you). So why do people use this? Should we use it, or is it bad practice?

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  • Who owns the code, who owns the algorithm, who owns the idea?

    - by Vorac
    This question got me thinking what products of the programming effort belong to the employer, and what don't. The two extremes are (0) the code - it apparently belongs to the employer and (1) the learned personal and technical skills. But what is in between? Who owns the pseudocode/algorithm? Who owns the general idea of the algorithm? Who owns the know-how that such an algorithm may serve some useful purpose (e.g. on this site questions are values, as well as answers)? Also: Who owns an idea on the web?

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  • "// ..." comments at end of code block after } - good or bad?

    - by gablin
    I've often seen such comments be used: function foo() { ... } // foo while (...) { ... } // while if (...) { ... } // if and sometimes even as far as if (condition) { ... } // if (condition) I've never understood this practice and thus never applied it. If your code is so long that you need to know what this ending } is then perhaps you should consider splitting it up into separate functions. Also, most developers tools are able to jump to the matching bracket. And finally the last is, for me, a clear violation to the DRY principle; if you change the condition you would have to remember to change the comment as well (or else it could get messy for the maintainer, or even for you). So why do people use this? Should we use it, or is it bad practice?

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  • Paste Functionality for WPF DataGrid with DataGridTemplateColumns

    - by zmang
    Hi. I recently started using the WPF Datagrid with DataGridTemplateColumns containing the WPF AutoCompleteBox, but I'm finding trouble in implementing Clipboard.Paste functionality for these DataGridTemplateColumns. I've managed to get Clipboard.Paste working with built-in DataGridColumns via Vishal's guide here, but it doesn't work with DataGridTemplateColumns. Delving into the OnPastingCellClipboardContent method in the DataGridColumn class, it appears that fe.GetBindingExpression(CellValueProperty) is returning null rather than the required BindingExpression. Can anyone point me to the right direction? public virtual void OnPastingCellClipboardContent(object item, object cellContent) { BindingBase binding = ClipboardContentBinding; if (binding != null) { // Raise the event to give a chance for external listeners to modify the cell content // before it gets stored into the cell if (PastingCellClipboardContent != null) { DataGridCellClipboardEventArgs args = new DataGridCellClipboardEventArgs(item, this, cellContent); PastingCellClipboardContent(this, args); cellContent = args.Content; } // Event handlers can cancel Paste of a cell by setting its content to null if (cellContent != null) { FrameworkElement fe = new FrameworkElement(); fe.DataContext = item; fe.SetBinding(CellValueProperty, binding); fe.SetValue(CellValueProperty, cellContent); BindingExpression be = fe.GetBindingExpression(CellValueProperty); be.UpdateSource(); } } Thanks!

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  • Paste or Drop, copy data and release source?

    - by Harvey
    I have an MFC DocView SDI App that receives data from either the clipboard or drag and drop. The data is in either CF_HDROP or CF_TEXT format. I have a COleDropTarget derived CMyDropTarget member m_dropTarget of my CMainFrame class. I have two member functions of CMyDropTarget; OnDrop(...) and OnPaste() which each call another member function PostData(pDataObject). I want to get a copy of the pDataObject from either CF_... format and PostMessage to my CmainFrame which will call a member of my Doc class. What is a simple way of getting a copy of the global data to pass with the PostMessage() so that I can get the drop source released before I get around to processing the global data? NOTE that they are always treated as a copy of the source data, so there is no need for the source to delete anything when the operation is done. Or perhaps a better way of asking the question is: How can I release the Drop source before processing the global data? Can I pass the HGLOBAL via PostMessage and still release the source without making a copy of it?

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  • InputManager ignores cut/copy/paste when initiated from menu

    - by Wallstreet Programmer
    I'm using the InputManager to check if changes to controls are done by user or code. This works fine, except when user uses the context menu for cut/copy/paste. If the user do ctrl+v in a textbox, InputManager correctly notices it. However, if the paste is done from the context menu of the textbox, the InputManager never fires the PreNotifyInput or PostNotifyInput events. Anyone knows why? Or how to detect that these user actions? Below is a working sample. The lower textblock never gets updated when user uses the cut/copy/paste menu in the above textbox since PreNotifyInput never fires. XAML: <Window x:Class="InputMgrDemo.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Height="300" Width="300"> <StackPanel> <TextBox TextChanged="TextBox_TextChanged" /> <TextBlock Name="_text" /> </StackPanel> </Window> Code behind: using System.Windows; using System.Windows.Controls; using System.Windows.Input; namespace InputMgrDemo { public partial class Window1 : Window { public Window1() { InitializeComponent(); InputManager.Current.PreNotifyInput += ((sender, e) => _userInput = true); InputManager.Current.PostNotifyInput += ((sender, args) => _userInput = false); } private void TextBox_TextChanged(object sender, TextChangedEventArgs e) { if (_userInput) { _text.Text = (sender as TextBox).Text; } } private bool _userInput; } }

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  • Cannot redeclare class error when generating PHPUnit code coverage report

    - by Cobby
    Starting a project with Zend Framework 1.10 and Doctrine 2 (Beta1). I am using namespaces in my own library code. When generating code coverage reports I get a Fatal Error about Redeclaring a class. To provide more info, I've commented out the xdebug_disable() call in my phpunit executable so you can see the function trace (disabled local variables output because there was too much output). Here's my Terminal output: $ phpunit PHPUnit 3.4.12 by Sebastian Bergmann. ........ Time: 4 seconds, Memory: 16.50Mb OK (8 tests, 14 assertions) Generating code coverage report, this may take a moment.PHP Fatal error: Cannot redeclare class Cob\Application\Resource\HelperBroker in /Users/Cobby/Sites/project/trunk/code/library/Cob/Application/Resource/HelperBroker.php on line 93 PHP Stack trace: PHP 1. {main}() /usr/local/zend/bin/phpunit:0 PHP 2. PHPUnit_TextUI_Command::main() /usr/local/zend/bin/phpunit:54 PHP 3. PHPUnit_TextUI_Command-run() /usr/local/zend/share/pear/PHPUnit/TextUI/Command.php:146 PHP 4. PHPUnit_TextUI_TestRunner-doRun() /usr/local/zend/share/pear/PHPUnit/TextUI/Command.php:213 PHP 5. PHPUnit_Util_Report::render() /usr/local/zend/share/pear/PHPUnit/TextUI/TestRunner.php:478 PHP 6. PHPUnit_Framework_TestResult-getCodeCoverageInformation() /usr/local/zend/share/pear/PHPUnit/Util/Report.php:97 PHP 7. PHPUnit_Util_Filter::getFilteredCodeCoverage() /usr/local/zend/share/pear/PHPUnit/Framework/TestResult.php:623 Fatal error: Cannot redeclare class Cob\Application\Resource\HelperBroker in /Users/Cobby/Sites/project/trunk/code/library/Cob/Application/Resource/HelperBroker.php on line 93 Call Stack: 0.0004 322888 1. {main}() /usr/local/zend/bin/phpunit:0 0.0816 4114628 2. PHPUnit_TextUI_Command::main() /usr/local/zend/bin/phpunit:54 0.0817 4114964 3. PHPUnit_TextUI_Command-run() /usr/local/zend/share/pear/PHPUnit/TextUI/Command.php:146 0.1151 5435528 4. PHPUnit_TextUI_TestRunner-doRun() /usr/local/zend/share/pear/PHPUnit/TextUI/Command.php:213 4.2931 16690760 5. PHPUnit_Util_Report::render() /usr/local/zend/share/pear/PHPUnit/TextUI/TestRunner.php:478 4.2931 16691120 6. PHPUnit_Framework_TestResult-getCodeCoverageInformation() /usr/local/zend/share/pear/PHPUnit/Util/Report.php:97 4.2931 16691148 7. PHPUnit_Util_Filter::getFilteredCodeCoverage() /usr/local/zend/share/pear/PHPUnit/Framework/TestResult.php:623 (I have no idea why it shows the error twice...?) And here is my phpunit.xml: <phpunit bootstrap="./code/tests/application/bootstrap.php" colors="true"> <!-- bootstrap.php changes directory to trunk/code/tests, all paths below are relative to this directory. --> <testsuite name="My Promotions"> <directory>./</directory> </testsuite> <filter> <whitelist> <directory suffix=".php">../application</directory> <directory suffix=".php">../library/Cob</directory> <exclude> <!-- By adding the below line I can remove the error --> <file>../library/Cob/Application/Resource/HelperBroker.php</file> <directory suffix=".phtml">../application</directory> <directory suffix=".php">../application/doctrine</directory> <file>../application/Bootstrap.php</file> <directory suffix=".php">../library/Cob/Tools</directory> </exclude> </whitelist> </filter> <logging> <log type="junit" target="../../build/reports/tests/report.xml" /> <log type="coverage-html" target="../../build/reports/coverage" charset="UTF-8" yui="true" highlight="true" lowUpperBound="50" highLowerBound="80" /> </logging> </phpunit> I have added a tag inside the which seams to hide this problem. I do have another application resource but it doesn't seam to have a problem (the other one is a Doctrine 2 resource). I'm not sure why it is specific to this class, my entire library is autoloaded so their isn't any include/require calls anywhere. I guess it should be noted that HelperBroker is the first file in the filesystem stemming out from library/Cob I am on Snow Leopard with the latest/recent versions of all software (Zend Server, Zend Framework, Doctrine 2 Beta1, Phing, PHPUnit, PEAR).

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  • How to play a embedded code in lightbox type popup

    - by Fero
    Hi all How to play a embedded code in lightbox type pop up? Here is the whole code <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <meta http-equiv="imagetoolbar" content="no" /> <title>FancyBox 1.3.1 | Demonstration</title> <script type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js"></script> <script type="text/javascript" src="./fancybox/jquery.mousewheel-3.0.2.pack.js"></script> <script type="text/javascript" src="./fancybox/jquery.fancybox-1.3.1.js"></script> <link rel="stylesheet" type="text/css" href="./fancybox/jquery.fancybox-1.3.1.css" media="screen" /> <link rel="stylesheet" href="style.css" /> <script type="text/javascript"> $(document).ready(function() { /* * Examples - images */ $("a#example1").fancybox({ 'titleShow' : false }); $("a#example2").fancybox({ 'titleShow' : false, 'transitionIn' : 'elastic', 'transitionOut' : 'elastic' }); $("a#example3").fancybox({ 'titleShow' : false, 'transitionIn' : 'none', 'transitionOut' : 'none' }); $("a#example4").fancybox(); $("a#example5").fancybox({ 'titlePosition' : 'inside' }); $("a#example6").fancybox({ 'titlePosition' : 'over' }); $("a[rel=example_group]").fancybox({ 'transitionIn' : 'none', 'transitionOut' : 'none', 'titlePosition' : 'over', 'titleFormat' : function(title, currentArray, currentIndex, currentOpts) { return '<span id="fancybox-title-over">Image ' + (currentIndex + 1) + ' / ' + currentArray.length + (title.length ? ' &nbsp; ' + title : '') + '</span>'; } }); /* * Examples - various */ $("#various1").fancybox({ 'titlePosition' : 'inside', 'transitionIn' : 'none', 'transitionOut' : 'none' }); $("#various2").fancybox(); $("#various3").fancybox({ 'width' : '75%', 'height' : '75%', 'autoScale' : false, 'transitionIn' : 'none', 'transitionOut' : 'none', 'type' : 'iframe' }); $("#various4").fancybox({ 'padding' : 0, 'autoScale' : false, 'transitionIn' : 'none', 'transitionOut' : 'none' }); }); </script> </head> <body> <div id="content"> <p> <a id="example1" href="./example/1_b.jpg"><img alt="example1" src="./example/1_s.jpg" /></a> <a id="example2" href="./example/2_b.jpg"><img alt="example2" src="./example/2_s.jpg" /></a> <a id="example3" href="./example/3_b.jpg"><img alt="example3" src="./example/3_s.jpg" /></a> </p> </div> <div><p>&nbsp;</p></div> </body> </html> This above code working for image perfectly. But how shall i play the embedded code instead of image. Here is the sample embedded code. <object width="480" height="385"><param name="movie" value="http://www.youtube.com/v/WUW5g-sL8pU&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/WUW5g-sL8pU&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="480" height="385"></embed></object> thanks in advance...

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  • Collocation in Code

    - by Dan McGrath
    Quite some time ago I remember reading an article from 'Joel on Software' that mentioned collocation of information in code was important. By collocation, I mean that relevant information about the code is present when the code is. I'm currently writing an article that has a small bit in it about collocation so I went searching for sources and found the quote in the article 'Making Wrong Code Look Wrong' In order to make code really, really robust, when you code-review it, you need to have coding conventions that allow collocation. In other words, the more information about what code is doing is located right in front of your eyes, the better a job you’ll do at finding the mistakes. When you have code that says For me, collocation isn't just about the code itself, but the tool used to view the code. If it can help with the 'collocation factor' (term coined by me?) I believe it can help with the programmers productivity. Take for example the modern IDEs that show you the variables type by hovering over it. Are their any other articles written about collocation in code and/or are their other terms that this is known by?

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  • Static classes and/or singletons -- How many does it take to become a code smell?

    - by Earlz
    In my projects I use quite a lot of static classes. These are usually classes that naturally seem to fit into a single-instance type of thing. Many times I use static classes and recently I've started using some singletons. How many of these does it take to become a code smell? For instance, in my recent project which has a lot of static classes is an Authentication library for ASP.Net. I use a static class for a helper class that fixes ASP.Net error codes so it can be used like CustomErrorsFixer.Fix(Context); Or my authentication class itself is a static class //in global.asax's begin_application Authentication.SomeState="blah"; Authentication.SomeOption=true; //etc //in global.asax's begin_request Authentication.Authenticate(); When are static or singleton classes bad to use? Am I doing it wrong, or am I just in a project that by definition has very little per-instance state associated with it? The only per-instance state I have is stored in HttpContext.Current.Items like so: /// <summary> /// The current user logged in for the HTTP request. If there is not a user logged in, this will be null. /// </summary> public static UserData CurrentUser{ get{ return HttpContext.Current.Items["fscauth_currentuser"] as UserData; //use HttpContext.Current as a little place to persist static data for this request } private set{ HttpContext.Current.Items["fscauth_currentuser"]=value; } }

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  • c++ accumulate with move instead of copy [migrated]

    - by user74399
    I have the following code auto adder = [](string& s1, const string& s2)->string&& { if (!s1.empty()) s1 += " "; s1 += s2; return move(s1); }; string test; test.reserve(wordArray.size() * 10); string words = accumulate(wordArray.begin(), wordArray.end(), move(test), adder); What I would like here is to avoid string copying. Unfortunately this is not accomplished by the vs2012 implementation of accumulate. Internally accumulate calls another function _Accumulate and the rvalue functionality gets lost in the process. It I instead call the _Accumulate function like so string words = Accumulate(wordArray.begin(), wordArray.end(), move(test), adder); I get the intended performance gain. Must the std library be rewritten to take rvalue arguments into consideration? Is there some other way I may use accumulate to accomplish what I want without cheating to much?

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  • Code Golf: Countdown Number Game

    - by Noldorin
    Challenge Here is the task, inspired by the well-known British TV game show Countdown. The challenge should be pretty clear even without any knowledge of the game, but feel free to ask for clarifications. And if you fancy seeing a clip of this game in action, check out this YouTube clip. It features the wonderful late Richard Whitely in 1997. You are given 6 numbers, chosen at random from the set {1, 2, 3, 4, 5, 6, 8, 9, 10, 25, 50, 75, 100}, and a random target number between 100 and 999. The aim is to make use the six given numbers and the four common arithmetic operations (addition, subtraction, multiplication, division; all over the rational numbers) to generate the target - or as close as possible either side. Each number may only be used once at most, while each arithmetic operator may be used any number of times (including zero.) Note that it does not matter how many numbers are used. Write a function that takes the target number and set of 6 numbers (can be represented as list/collection/array/sequence) and returns the solution in any standard numerical notation (e.g. infix, prefix, postfix). The function must always return the closest-possible result to the target, and must run in at most 1 minute on a standard PC. Note that in the case where more than one solution exists, any single solution is sufficient. Examples: {50, 100, 4, 2, 2, 4}, target 203 e.g. 100 * 2 + 2 + (4 / 4) e.g. (100 + 50) * 4 * 2 / (4 + 2) {25, 4, 9, 2, 3, 10}, target 465 e.g. (25 + 10 - 4) * (9 * 2 - 3) {9, 8, 10, 5, 9, 7), target 241 e.g. ((10 + 9) * 9 * 7) + 8) / 5 Rules Other than mentioned in the problem statement, there are no further restrictions. You may write the function in any standard language (standard I/O is not necessary). The aim as always is to solve the task with the smallest number of characters of code. Saying that, I may not simply accept the answer with the shortest code. I'll also be looking at elegance of the code and time complexity of the algorithm! My Solution I'm attempting an F# solution when I find the free time - will post it here when I have something! Format Please post all answers in the following format for the purpose of easy comparison: Language Number of characters: ??? Fully obfuscated function: (code here) Clear (ideally commented) function: (code here) Any notes on the algorithm/clever shortcuts it takes.

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  • Advice Needed: Developers blocked by waiting on code to merge from another branch using GitFlow

    - by fogwolf
    Our team just made the switch from FogBugz & Kiln/Mercurial to Jira & Stash/Git. We are using the Git Flow model for branching, adding subtask branches off of feature branches (relating to Jira subtasks of Jira features). We are using Stash to assign a reviewer when we create a pull request to merge back into the parent branch (usually develop but for subtasks back into the feature branch). The problem we're finding is that even with the best planning and breakdown of feature cases, when multiple developers are working together on the same feature, say on the front-end and back-end, if they are working on interdependent code that is in separate branches one developer ends up blocking the other. We've tried pulling between each others' branches as we develop. We've also tried creating local integration branches each developer can pull from multiple branches to test the integration as they develop. Finally, and this seems to work possibly the best for us so far, though with a bit more overhead, we have tried creating an integration branch off of the feature branch right off the bat. When a subtask branch (off of the feature branch) is ready for a pull request and code review, we also manually merge those change sets into this feature integration branch. Then all interested developers are able to pull from that integration branch into other dependent subtask branches. This prevents anyone from waiting for any branch they are dependent upon to pass code review. I know this isn't necessarily a Git issue - it has to do with working on interdependent code in multiple branches, mixed with our own work process and culture. If we didn't have the strict code-review policy for develop (true integration branch) then developer 1 could merge to develop for developer 2 to pull from. Another complication is that we are also required to do some preliminary testing as part of the code review process before handing the feature off to QA.This means that even if front-end developer 1 is pulling directly from back-end developer 2's branch as they go, if back-end developer 2 finishes and his/her pull request is sitting in code review for a week, then front-end developer 2 technically can't create his pull request/code review because his/her code reviewer can't test because back-end developer 2's code hasn't been merged into develop yet. Bottom line is we're finding ourselves in a much more serial rather than parallel approach in these instance, depending on which route we go, and would like to find a process to use to avoid this. Last thing I'll mention is we realize by sharing code across branches that haven't been code reviewed and finalized yet we are in essence using the beta code of others. To a certain extent I don't think we can avoid that and are willing to accept that to a degree. Anyway, any ideas, input, etc... greatly appreciated. Thanks!

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  • How to pause/resume transfer of large files?

    - by Olivier Lalonde
    I recently had to copy about 20 GB of data split between about 20 files from my laptop to an external hard drive. Since this operation takes quite a while (at ~560kb/s), I was wondering if there was any way to pause the transfer and resume it later (in case, I need to interrupt the transfer). As a side question, is there any performance difference between copying from the terminal vs copying from Nautilus?

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  • Fixing the #mvvmlight code snippets in Visual Studio 11

    - by Laurent Bugnion
    If you installed the latest MVVM Light version for Windows 8, you may encounter an issue where code snippets are not displayed correctly in the Intellisense popup. I am working on a fix, but for now here is how you can solve the issue manually. The code snippets MVVM Light, when installed correctly, will install a set of code snippets that are very useful to allow you to type less code. As I use to say, code is where bugs are, so you want to type as little of that as possible ;) With code snippets, you can easily auto-insert segments of code and easily replace the keywords where needed. For instance, every coder who uses MVVM as his favorite UI pattern for XAML based development is used to the INotifyPropertyChanged implementation, and how boring it can be to type these “observable properties”. Obviously a good fix would be something like an “Observable” attribute, but that is not supported in the language or the framework for the moment. Another fix involves “IL weaving”, which is a post-build operation modifying the generate IL code and inserting the “RaisePropertyChanged” instruction. I admire the invention of those who developed that, but it feels a bit too much like magic to me. I prefer more “down to earth” solutions, and thus I use the code snippets. Fixing the issue Normally, you should see the code snippets in Intellisense when you position your cursor in a C# file and type mvvm. All MVVM Light snippets start with these 4 letters. Normal MVVM Light code snippets However, in Windows 8 CP, there is an issue that prevents them to appear correctly, so you won’t see them in the Intellisense windows. To restore that, follow the steps: In Visual Studio 11, open the menu Tools, Code Snippets Manager. In the combobox, select Visual C#. Press Add… Navigate to C:\Program Files (x86)\Laurent Bugnion (GalaSoft)\Mvvm Light Toolkit\SnippetsWin8 and select the CSharp folder. Press Select Folder. Press OK to close the Code Snippets Manager. Now if you type mvvm in a C# file, you should see the snippets in your Intellisense window. Cheers Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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