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  • Delayed responses for cURL SSL PUTs/POSTs (php) (NSS vs OpenSSL)

    - by Yarin
    I have two Fedora-based apache webservers making the same SSL PUT/POST calls with php/cURL. One works fine, but with the other the call succeeds but takes a VERY long time to return a response (~10 min). (GETs don't seem affected) The working server's cURL uses OpenSSL for SSL, while the non-working version uses a later version of cURL that uses NSS for SSL I know nothing about SSL implementations or their effect on cURL. What would cause such a significant delay in SSL PUT/POST responses? Any suggestions appreciated- Thanks--

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  • SQL vs MySQL: Rules about aggregate operations and GROUP BY

    - by Phazyck
    In this book I'm currently reading while following a course on databases, the following example of an illegal query using an aggregate operator is given: Find the name and age of the oldest sailor. Consider the following attempt to answer this query: SELECT S.name, S.age FROM Sailors.S The intent is for this query to return not only the maximum age but also the name of the sailors having that age. However, this query is illegal in SQL--if the SELECT clause uses an aggregate operation, then it must use only aggregate operations unless the query contains a GROUP BY clause! Some time later while doing an exercise using MySQL, I faced a similar problem, and made a mistake similar to the one mentioned. However, MySQL didn't complain and just spit out some tables which later turned out not be what I needed. Is the query above really illegal in SQL, but legal in MySQL, and if so, why is that? In what situation would one need to make such a query?

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  • c++ class member functions instatiated by traits

    - by Jive Dadson
    I am reluctant to say I can't figure this out, but I can't figure this out. I've googled and searched stackoverflow, and come up empty. The abstract, and possibly overly vague form of the question is, how can I use the traits-pattern to instantiate non-virtual member functions? The question came up while modernizing a set of multivariate function optimizers that I wrote more than 10 years ago. The optimizers all operate by selecting a straight-line path through the parameter space away from the current best point (the "update"), then finding a better point on that line (the "line search"), then testing for the "done" condition, and if not done, iterating. There are different methods for doing the update, the line-search, and conceivably for the done test, and other things. Mix and match. Different update formulae require different state-variable data. For example, the LMQN update requires a vector, and the BFGS update requires a matrix. If evaluating gradients is cheap, the line-search should do so. If not, it should use function evaluations only. Some methods require more accurate line-searches than others. Those are just some examples. The original version instantiates several of the combinations by means of virtual functions. Some traits are selected by setting mode bits that are tested at runtime. Yuck. It would be trivial to define the traits with #define's and the member functions with #ifdef's and macros. But that's so twenty years ago. It bugs me that I cannot figure out a whiz-bang modern way. If there were only one trait that varied, I could use the curiously recurring template pattern. But I see no way to extend that to arbitrary combinations of traits. I tried doing it using boost::enable_if, etc.. The specialized state info was easy. I managed to get the functions done, but only by resorting to non-friend external functions that have the this-pointer as a parameter. I never even figured out how to make the functions friends, much less member functions. The compiler (vc++ 2008) always complained that things didn't match. I would yell, "SFINAE, you moron!" but the moron is probably me. Perhaps tag-dispatch is the key. I haven't gotten very deeply into that. Surely it's possible, right? If so, what is best practice?

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  • Can't access font resource in Silverlight class library

    - by Matt
    I have a reasonably large Silveright 3.0 project on the go, and I'm having issues accessing a couple of custom font resources from within one of the assemblies. I've got a working test solution where I have added a custom font as a resource, and can access it fine from XAML using: <TextBlock Text="Test" FontFamily="FontName.ttf#Font Name" /> The test solution consists of the TestProject.Application and the TestProject.Application.Web projects, with all the fun and games obviously in the TestProject.Application project However, when I try this in my main solution, the fonts refuse to show in the correct type face (instead showing in the default font). There's no difference in the way the font has been added to project between the test solution and the main solution, and the XAML is identical. However, there is a solution layout difference. In the main solution, as well as having a MainApp.Application and MainApp.Application.Web project, I also have a MainApp.Application.ViewModel project and a MainApp.Application.Views project, and the problem piece of XAML is the in the MainApp.Application.Views project (not the .Application project like the test solution). I've tried putting the font into either the .Application or .Application.Views project, tried changing the Build Action to Content, Embedded Resource etc, all to no avail. So, is there an issue accessing font resources from a child assembly that I don't know about, or has anyone successfully done this? My long term need will be to have the valid custom fonts being stored as resources in a separate .Application.FontLibrary assembly that will be on-demand downloaded and cached, and the XAML controls in the .Application.Views project will need to reference this FontLibrary assembly to get the valid fonts. I've also tried xcreating this separate font library assembly, and I can't seem to get the fonts from the second assembly. As some additional information, I've also tried the following font referencing approaches: <TextBlock Text="Test" FontFamily="/FontName.ttf#Font Name" /> <TextBlock Text="Test" FontFamily="pack:application,,,/FontName.ttf#Font Name" /> <TextBlock Text="Test" FontFamily="pack:application,,,/MainApp.Application.Views;/FontName.ttf#Font Name" /> <TextBlock Text="Test" FontFamily="pack:application,,,/MainApp.Application.Views;component/FontName.ttf#Font Name" /> And a few similar variants with different assembly references/sub directories/random semi colons. And so far nothing works... anyone struck this (and preferably solved it)?

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  • Flex unit testing with ANT vs Flash Builder 4

    - by peterlindstrom21
    I have just tried setup unit testing in Flash Builder 4, and it working nicely. A setup of a parallel test source structure and using Flash Builder 4:s new TestCase and new TestSuite I was up and running with some testcases within minutes. But now I want to compile them from a ant flex task, the Flash Builder generates FlexUnitApplication.mxml and FlexUnitCompilerApplication.mxml. Is there a nice way to build the unit tests with ant using these? I cant find any sample where this is done.

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  • Enable debugging in Design mode in VS

    - by Dan Tao
    Is there any way to enable debugging from within the Windows Forms Designer in Visual Studio (any version, up to and including 2010)? What I mean is, say I have some custom user control, and this control has certain validation that it performs when I set a particular property. I'd like to be able to set a breakpoint somewhere within that code, and step through it to see what happens when I set the property from the designer.

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  • how to add special class for labels and errors on zend form elements?

    - by user1400
    hello how we could add a special class for labels and errors for a zend-form-element for example html output code before add classes <dt id="username-label"><label for="username" class="required">user name:</label></dt> <dd id="username-element"> <input type="text" name="username" id="username" value="" class="input" /> <ul class="errors"><li>Value is required and can't be empty</li></ul></dd> and code after we add classes <dt id="username-label"><label for="username" **class="req-username"**>user name:</label></dt> <dd id="username-element"> <input type="text" name="username" id="username" value="" class="input" /> <ul **class="err-username"**><li>Value is required and can't be empty</li></ul></dd> thanks

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  • Flex Import Class from a Module within a sub directory

    - by Tom
    I put some modules in a module folder. How do I import classes with the import statement when I'm in a sub folder? This won't work, not like classes which are in packages. modules/SomeModule.mxml <?xml version="1.0"?> <mx:Module> <mx:Script> <![CDATA[ import Fruit.Apple; ]]> </mx:Script> </mx:Module> Directory: . |-- Fruit |-- Apple.as |-- Modules |-- SomeModule.mxml `-- application.mxml

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  • post increment vs pre increment [closed]

    - by mousey
    Possible Duplicate: Difference between i++ and ++i in a loop? Hi, Can some one please help me when to use pre increment or post increment in a for loop. I am getting the same results for both the loops! I also would like to know when and where to choose one between the two. Thanks in advance.

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  • jQuery Templates vs Partial Views in ASP.NET MVC

    - by Jaco Pretorius
    I'm taking a look at jQuery templates. It looks really interesting - easy syntax, easy to use, very clean. However, I can't really see why it's better to use jQuery templates instead of simply fetching partial views via AJAX. It simply seems like the partial views would be much easier to maintain and helps to avoid duplication of code. I want to use jQuery templates. But when would it be better than partial views?

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  • StringBuilder/StringBuffer vs. "+" Operator

    - by matt.seil
    I'm reading "Better, Faster, Lighter Java" (by Bruce Tate and Justin Gehtland) and am familiar with the readability requirements in agile type teams, such as what Robert Martin discusses in his clean coding books. On the team I'm on now, I've been told explicitly not to use the "+" operator because it creates extra (and unnecessary) string objects during runtime. But this article: http://www.ibm.com/developerworks/java/library/j-jtp01274.html Written back in '04 talks about how object allocation is about 10 machine instructions. (essentially free) It also talks about how the GC also helps to reduce costs in this environment. What is the actual performance tradeoffs between using "+," "StringBuilder," or "StringBuffer?" (In my case it is StringBuffer only as we are limited to Java 1.4.2.) StringBuffer to me results in ugly, less readable code, as a couple of examples in Tate's book demonstrates. And StringBuffer is thread-synchronized which seems to have its own costs that outweigh the "danger" in using the "+" operator. Thoughts/Opinions?

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  • Programming for a 32-bit environment vs programming for a 64-bit environment / Build configurations

    - by Russel
    I was looking at some same code (a sample MS Visual Studio C++ project) recently with multiple build configurations (Release/Debug, Win32/x64). My question: What is the difference? I guess I understand Release/Debug (Release = finalized version of project, Debug = version used to run in debugger), but what things need to be considered when building different versions for Win32/x64 platforms? Is there any coding differences, or does this just affect how that same code is ultimately built into machine code? I know there are different library files depending on whether you're using a 32-bit or 64-bit system as well... Are all of these differences again just machine code? Would a 32-bit library file and its corresponding 64-bit library file be two files with exactly the same functions build from the same source code originally, and only differing in their machine code implementation? Thanks! --Russel

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  • ComboBox SelectedItem vs SelectedValue

    - by Anna Lear
    The following code works as you’d expect — MyProperty on the model is updated when the user picks a new item in the dropdown. comboBox1.DataBindings.Add("SelectedValue", myModel, "MyProperty", true, DataSourceUpdateMode.OnPropertyChanged); The following, however, doesn’t work the same way and the model update isn’t triggered until the input focus moves to another control on the form: comboBox1.DataBindings.Add("SelectedItem", myModel, "MyProperty", true, DataSourceUpdateMode.OnPropertyChanged); Does anybody know why? I don’t even know where to start investigating the cause. Pointers in the right direction to start the investigation or an outright explanation would be equally appreciated. Thanks.

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  • Folders without Namespaces C#, .Net, VS 2008

    - by Joel
    I'm working on an ASP.NET webapp using the MVP pattern, and as I'm organizing my files I'm wondering - are there conventions on folders within projects and how they relate to namespaces? I have a bunch of controls and a bunch of pages, and I was going to throw them into Controls and Pages folders with subfolders, but I didn't know if it was bad form to do this if I wasn't also going to seperate them out into namespaces. Thanks.

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  • Threading vs single thread

    - by user177883
    Is it always guaranteed that a multi-threaded application would run faster than a single threaded application? I have two threads that populates data from a data source but different entities (eg: database, from two different tables), seems like single threaded version of the application is running faster than the version with two threads. Why would the reason be? when i look at the performance monitor, both cpu s are very spikey ? is this due to context switching? what are the best practices to jack the CPU and fully utilize it? I hope this is not ambiguous.

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  • Speed of NSScanner vs NSXMLParser?

    - by Chris
    I have an iPhone App that reads in an XML file, then pulls out the necessary data by looping through an NSScanner. The XML is not particularly long. I am wondering if it would be worth the work to implement NSXMLParser in place of using NSScanner, if I will see any real improvement in speed?

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  • Java application vs. Java applet

    - by user69514
    Hey guys I created this pacman game in Java. I would like to put in on my website so people can play on there. However I have never done any applets, nor do I know javascript. Is there a way to automatically convert the project into an applet? Or do I have to code it from scratch?

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