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• Is ASP.Net Server Control, Postback Architecture failed in current Web 2.0 World.

  - by Lalit

  What i am looking around me is the drastically change in ASP.Net Architecture. More and more company are following the approach of JSON based wcf service in middle tier. Plain HTML based UI tier with JQuery/Ajax. No Postback at all, This contradicts the Default behaviour of Asp.Net Server Control/Code Behind Event handler/Postback. I am a Asp.Net Web Developer for around 4 years, and concerned about the future of ASP.Net. Is the Default Architecture of ASP.Net is Outdated at all? Does MVC or ASP.Net 4.0 Tries to solve the Issue?

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• Getting "Illegal Seek" error after calling accept()

  - by Bilthon

  Well.. it's pretty much that, I seem to be getting a "Illegal Seek" error when checking my errno variable. The problem is that I have no idea of what that can mean. I know sockets are treated like files in unix, but I can't see how can this be related to sockets. What I'm doing exactly is: int sck = ::accept(m_socket, (struct sockaddr*)&client_address, (socklen_t*)&address_len); Then I get sck = -1 and errno = ESPIPE And the weird thing is that it happens randomly. I mean, sometimes the code works fine, and sometimes it just thows an exception. I'm working with threads so that's understandable. But I just would like to know what kind of behaviour makes the accept() call to set errno as ESPIPE so I could check the paramethers for instance. Thanks Nelson R. Pérez

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• How can I fix the scroll bug when using Windows rich edit controls in wxpython?

  - by ChrisD

  When using wx.TextCtl with the wx.TE_RICH2 option in windows, I get this strange bug with the auto-scroll when using the AppendText function. It scrolls so that all the text is above the visible area, which isn't very useful behaviour. I tried just adding a call to ScrollLines(-1) after appending the text - which does scroll it to the correct position - but this can lead to the window flashing when it auto-scrolls. So I'm looking for another way to automatically scroll to the bottom. So far, my solution is to bypass the AppendText functions auto-scroll and implement my own, like this: def append_text(textctrl, text): before_number_of_lines = textctrl.GetNumberOfLines() textctrl.SetInsertionPointEnd() textctrl.WriteText(text) after_number_of_lines = textctrl.GetNumberOfLines() textctrl.ScrollLines(before_number_of_lines - after_number_of_lines + 1) Is there a better way?

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• nHibernate one-to-many inserts but doesnt update

  - by user210713

  Instead of getting into code, I have a simple question. Default behavior for a simple one-to-many is that it inserts the child record then updates the foreign key column with the parent key. Has anyone ever had a one-to-many where the child object gets inserted but not updated resulting in a row in my table with a null in the foreign key column? I want the default behaviour for a standard one-to-many. I don't want to have to add the parent as a property to the child. Thanks.

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• django handling file uploads - target different than media folder

  - by Tom Tom

  Hi, I want to enable the user to upload media which will not be saved in the media folder. When I use the following line of code data will be uploaded to media/upload/logo . logo_img = models.FileField(upload_to='upload/logo', blank=True) I'm wondering how I can change this behaviour. I would try to write a custom FileField and a view that serves the data based on the database entries. I do not want to place the data the user uploads to the media folder, since it is no public data. Is this approach correct? Are there solutions out there which do exactly what I want and I would reinvent the wheel with implementing this by myself? Would appreciate any help!

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• Sessionstate not being saved between pages

  - by Grant

  Hi, i am having problems with an asp.net c# site whereby i am setting a session state object to true and then redirecting to another page that needs to check the value of the session state object and it is null. Sometimes it is set correctly and other times is is simply null. When i debug on my local machine it works perfectly every time. Only when i upload to my web server does this temperamental behaviour happen. As it is based around the security of the site it is obviously important that the session data be valid and accurate every time. Is session state data unreliable? AFAIK its set to inproc, cookieless, 30 min timeout, vanilla installation of IIS. Does anyone have any suggestions? Perhaps i need to thread.sleep inbetween the storing of the session data and the reading? NB: the time between the write and the read is about 70ms.. ample time for the data to be written to RAM.....

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• Memcache localhost connection oddity

  - by MatW

  When I try to connect to memcache using this code: $memcache = new Memcache; $memcache->connect('localhost', 11211) or die ("Could not connect"); The call dies with the "Could not connect" error, but if I use localhost's IP: $memcache = new Memcache; $memcache->connect('127.0.0.1', 11211) or die ("Could not connect"); It works! So what's my problem? Well, this new computer is the only development environment I've setup that's been sensitive to that difference. I'm not about to go changing the settings on any code for what seems to be a computer specific issue, but I can't figure out what could be causing this behaviour... Any ideas? I'm running XP, memcached 1.2.4, and wampserver 2. I've checked the hosts file and it does have an entry for localhost.

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• how can I override an anonymous javascript function attached to an eventlistener?

  - by Sid

  I found that a website does somewhat sneaky things. When you hover over a link, it shows you the real URL. WHen you click on it, it uses the click/mousedown event to rewrite the URL. I want to override that behaviour in firefox, So I fired up firebug to see what it does. On a mouse click, it executes a function called window.tgs. Easy, I thought. I can override this function. My first attempt was to do get the element via getELementsByTagName(), and then element.removeEventListener("click",window.tgs, false); To my surprise, this did nothing. I tried redefining window.tgs window.tgs = function() { return true; }; that did not do anything either. I am not a JS expert. Your insights appreciated thanks Sid

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• After Trigger execute before constraint check in oracle

  - by satakare

  Hi, I have After Insert/Update trigger on Table T1 which get the referential data for Col1 from T2 and does some work and insert it into another table. The col1 is FK to Table T2. When user insert the incorrect or non existing value into the Col1 and if trigger is disabled I am getting constraint error that is fine. But when trigger is enabled and user insert the wrong value in Col1 trigger is getting fired and shows the 'no data found' error message. Actually I am expecting the table to throw constraint error, but trigger is throwing it. Please let me know your comments about this trigger behaviour.

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• Bind Data after TCP receive.

  - by gtas

  I have this strange problem all day now. I dunno if you handled something similar. I used two different serializers and now i know its not this problem. Im sending some data over TCP Sockets. Serialize - Send - Deserialize, everything works ok, i can get my objects search through them, use they're properties! But, if e.g receive a BusinessObject[] and convert into List<BusinessObject>, then bind the list in a Control.DataSource = businessObjectList; BOOM! NotSupportedException. Tried it with 3 different controls. Same behaviour. My head is empty of ideas right now!! The Send TCP happens on Desktop Framework, Receive on Compact Framework. But i dont think this has to do with anything. I wish for an explanation on this!

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• How to auto-restart a python script on fail?

  - by norm

  This post describes how to keep a child process alive in a BASH script: http://stackoverflow.com/questions/696839/how-do-i-write-a-bash-script-to-restart-a-process-if-it-dies This worked great for calling another BASH script. However, I tried executing something similar where the child process is a Python script: #!/bin/bash PYTHON=/usr/bin/python2.6 function myprocess { $PYTHON daemon.py start } NOW=$(date +"%b-%d-%y") until myprocess; do echo "$NOW Prog crashed. Restarting..." >> error.txt sleep 1 done Now the behaviour is completely different. It seems the python script is no longer a child of of the bash script but seems to have 'taken over' the BASH scripts PID - so there is no longer a BASH wrapper round the called script...why?

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• No GPS updates on Galaxy S3

  - by Valelik

  I'm developing a GPS tracker and it works like a charm. But a couple of weeks ago a customer of me (a trackage company) bought Samsung Galaxy S3 for his drivers. And since that we have really strange behaviour of my app. The app receives location updates from GPS receiver, but after some hours of work it doesn't receive any location updates. I have registered the app for onGpsStatusChanged() too and in this time onGpsStatusChanged() was called (I see that GPS receiver have 10-17 satellites!), but the method onLocationChanged() was not called! After the service restart (=re-registering of LocationListener) it works again. It is really strange. It seems that after some hours of work the GPS reciever is not in the mood for calling onLocationChanged() :) Any idea what may be wrong?

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• WiX: Extracting Binary-string in Custom Action yields string like "???good data"

  - by leiflundgren

  I just found a weird behaviour when attempting to extract a string from the Binary-table in the MSI. I have a file containing "Hello world", the data I get is "???Hello world". (Literary question mark.) Is this as intended? Will it always be exactly 3 characters in the beginning? Regards Leif Sample code: [CustomAction] public static ActionResult CustomAction2(Session session) { View v = session.Database.OpenView("SELECT `Name`,`Data` FROM `Binary`"); v.Execute(); Record r = v.Fetch(); int datalen = r.GetDataSize("Data"); System.IO.Stream strm = r.GetStream("Data"); byte[] rawData = new byte[datalen]; int res = strm.Read(rawData, 0, datalen); strm.Close(); String s = System.Text.Encoding.ASCII.GetString(rawData); // s == "???Hello World" return ActionResult.Success; }

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• SDCC and malloc() - allocating much less memory than is available

  - by Duncan Bayne

  When I run compile this code with SDCC 3.1.0, and run it on an Amstrad CPC 464 (under emulation, with WinCPC 0.9.26 running on Wine): void _test_malloc() { long idx = 0; while (1) { if (malloc(5)) { printf("%ld\r\n", ++idx); } else { printf("done"); break; } } } ... it consistently taps out at 92 malloc()s. I make that 460 bytes, which leads me to a couple of questions: What is malloc() doing on this system? I was sort of hoping for an order of magnitude more storage even on a 64kB system The behaviour is consistent on 64kB systems and 128kB systems; do I have to perform some sort of magic to access the additional memory, like manual bank switching?

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• Is it valid for Hibernate list() to return duplicates?

  - by skaffman

  Is anyone aware of the validity of Hibernate's Criteria.list() and Query.list() methods returning multiple occurrences of the same entity? Occasionally I find when using the Criteria API, that changing the default fetch strategy in my class mapping definition (from "select" to "join") can sometimes affect how many references to the same entity can appear in the resulting output of list(), and I'm unsure whether to treat this as a bug or not. The javadoc does not define it, it simply says "The list of matched query results." (thanks guys). If this is expected and normal behaviour, then I can de-dup the list myself, that's not a problem, but if it's a bug, then I would prefer to avoid it, rather than de-dup the results and try to ignore it. Anyone got any experience of this?

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• d2: strange lowering of protection and possible misbehavior in static imports

  - by modchan

  Consider there is moda.d: module moda; private struct modb {}; And modb.d: module modb; private import moda; And modmain.d: module modmain; static import moda; static import modb; void main() { modb v; // should NOT compile, should it? } I don't know why, but moda.modb is visible in both modmain and modb, while, as far as I understand, it should not - both due to moda being imported as static and moda.modb being private. Or should? Have I run into dmd bug or it's planned behaviour I hadn't understood?

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• Overriding properties of child view controller vs setting them via parent view controller

  - by robinjam

  If you want to modify the default behaviour of a View Controller by changing the value of one of its properties, is it considered better form to instantiate the class and set its property directly, or subclass it and override the property? With the former it would become the parent View Controller's responsibility to configure its children, whereas with the latter the children would effectively configure themselves. EDIT: Some more information: The class I am referring to is FetchedTableViewController, a subclass of UITableViewController that I made to display the results of a Core Data fetch operation. There are two places I want to display the results of a fetch, and they each have different fetch requests. I'm trying to decide whether it's better to create a subclass for each one, and override the fetchRequest property, or make it the responsibility of the parent controller to set the fetchRequest property for its children.

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• An update question !

  - by rantravee

  Hi , Here's the problem I'm facing : trying to do my own application update I download the update apk from a web server on the sd card and then I launch the Package Installer with the downloading path ( while the old application is running) . So far after the package installer starts and the user agrees to install the application I get the following message " MyApp Could not be installed on this phone" and in the logcat then following message is printed : "No package identifier when getting value for resource number 0x00000000" . I could not find a reason for this behaviour , so please if there is something that I'm missing do point it to me !

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• Using MonadPlus in FRP.Reactive.FieldTrip

  - by ony

  I'm studying FRP at this moment through FieldTrip adaptor. And hit the problem with strange way of frames scheduling and integration. So now I'm trying to build own marker Event for aligning Behaviour stepping. So... flipflop :: Behavior String flipflop = stepper "none" (xflip 2) where xflip t0 = do t <- withTimeE_ (atTime t0) return "flip" `mplus` xflop (t+3) xflop t0 = do t <- withTimeE_ (atTime t0) return "flop" `mplus` xflip (t+2) txtGeom = ((uscale2 (0.5::Float) *%) . utext . show <$>) main = anim2 (txtGeom . pure flipflop) Questions is: Why this example leads to memory leak? Is there safe way to build sequence of events where each next one is scheduled depending on previous?

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• Are returned locals automatically xvalues

  - by mark

  Following on from a comment I made on this: passing std::vector to constructor and move semantics Is the std::move necessary in the following code, to ensure that the returned value is a xvalue? std::vector<string> buildVector() { std::vector<string> local; // .... build a vector return std::move(local); } It is my understanding that this is required. I have often seen this used when returning a std::unique_ptr from a function, however GManNickG made the following comment: It is my understanding that in a return statement all local variables are automatically xvalues (expiring values) and will be moved, but I'm unsure if that only applies to the returned object itself. So OP should go ahead and put that in there until I'm more confident it shouldn't have to be. :) Can anyone clarify if the std::move is necessary? Is the behaviour compiler dependent?

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• How can I make Ruby rake display the full backtrace on uncaught exception

  - by Martinos

  As you may know rake swallows the full backtrace on uncaught exception. If I want to have a full backtrace, I need to add the --trace option. I find this very annoying because some of my tasks take long time to run (up to 6 hours), when it crashes I don't have any debugging info. I need to run it again with the --trace. On top of that, the system may not be in the same state as when the error occurred, so it may not show afterward. I always have to add --trace on any tasks. This displasy stuff that I don't want to see when the task is executed. Is there a way to change this default behaviour? (which I don't think is useful at all)

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• Mixing table per subclass and per hierarchy in hibernate

  - by Xelluloid

  In my database there are two three tables. The first one, table ABSTRACT, holds three columns id, type, someText This table contains all abstract information for the abstract class abstract. Now the two tables CONCRETEONE and CONCRETETWO contain all information for the concrete classes concreteOne and concreteTwo. Now I know I could use the table per subclass strategy from hibernate to create a mapping with inheritance. But as I have a column that marks the type of the concrete implementation could it be possible to create some mixed behaviour like a table per subclass strategy with an discriminator?

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• GUI designers! - got suggestions for a GUI modelling diagram language?

  - by naugtur

  Refering to this question I asked a while ago: UI functionality modeling languages It looks like there is no good-enough solution. I decided to develop one. (and prepare a set of elements for DIA or something) I'm sure it will require a good insight in peoples' experiences and problems in designing functionally complicated GUIs. I've got some ideas already, but I'd like to hear from You what You'd expect from a GUI functionality modelling language. Clarification: It's functionality modelling, so it's not about where I put a button. It's about objects that have some events binded, and the interface behaviour logic. If You think (just as I do) that UML is far from useful for such purposes - feel free to put Your expectations here. I'll try to meet them. ( not necessarily in person;) ) Remember - there is no such thing as a wrong answer to this question

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• Scaling an image in a scroller resizes the scroller when relative dimension are set to the scroller

  - by tit

  Hi, I would like to position relatively a scroller in my application like below. When I scale the image, I resize the scroller... <s:Scroller width="50%" height="50%" > <s:Group> <mx:Image id="img" source="media/paxRomana005_150dpi.jpg" /> </s:Group> </s:Scroller> If I set absolute dimension to the scroller like below, it does not resize (behaviour I want) <s:Scroller width="400" height="400" > <s:Group> <mx:Image id="img" source="media/paxRomana005_150dpi.jpg" /> </s:Group> </s:Scroller> .. but my intention is to position the scroller relatively to other components. Any explanations/solutions? Thanks

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• Qt - invalid conversion to child class

  - by David Davidson

  I'm drawing polygons using the Graphics View framework. I added a polygon to the scene with this: QGraphicsPolygonItem *poly = scene->addPolygon(QPolygonF(vector_of_QPointF)); poly->setPos(some_point); But I need to implement some custom behaviour like selection, mouse over indicator, and other similar stuff on the graphics item. So I declared a class that inherits QGraphicsPolygonItem: #include <QGraphicsPolygonItem> class GridHex : public QGraphicsPolygonItem { public: GridHex(QGraphicsItem* parent = 0); }; GridHex::GridHex(QGraphicsItem* parent) : QGraphicsPolygonItem(parent) { } Not doing much with that class so far, as you can see. But shouldn't replacing QGraphicsPolygonItem with my GridHex class? This is throwing a " invalid conversion from 'QGraphicsPolygonItem*' to 'GridHex*' " error: GridHex* poly = scene->addPolygon(QPolygonF(vector_of_QPointF)); What am I doing wrong?

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