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  • TCP/UDP and ethernet MTU Fragmentation

    - by Fantastic Fourier
    I've read various sites and tutorials online but I am still confused. If the message is bigger than IP MTU, then send() returns the byte sent. What happens to the rest of the message? Am I to call send() again and attempt to send rest of the message? Or is that something IP layer should take care of automatically?

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  • Azure Web service on same domain as web page

    - by Inge Henriksen
    I have a JSON web service that I want to run on the same domain as my Web page. Both are to be used in Azure. They need to be on the same domain because since Im doing a JSON call, JSONP is not an option atm. I was thinking that my web would have the address http://example.cloudapp.net/, and my Web Service should have the address http://example.cloudapp.net/webservice/

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  • Objective C -- passing array literal to a method

    - by morgancodes
    This seems to work (compiler doesn't complain, anyway): float adsr[4] = {0,1.0/PULSE_SPEED, 0,1}; [sequence setBaseADSR:adsr]; but I want to make it more concise and do this: [sequence setBaseADSR:{0,1.0/PULSE_SPEED, 0,1}]; How do I do it? In javascript, I'd call stuff in the brackets an "array literal". Not sure if C languages have the same concept or terminology though.

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  • Proper way to use Linq with WPF

    - by Ingó Vals
    I'm looking for a good guide into the right method of using Linq to Sql together with WPF. Most guides only go into the bare basics like how to show data from a database but noone I found goes into how to save back to the database. Can you answer or point out to me a guide that can answer these questions. I have a separate Data project because the same data will also be used in a web page so I have the repository method. That means I have a seperate class that uses the DataContext and there are methods like GetAllCompanies() and GetCompanyById ( int id ). 1) Where there are collections is it best to return as a IQueryable or should I return a list? Inside the WPF project I have seen reccomendations to wrap the collection in a ObservabgleCollection. 2) Why should I use ObservableCollection and should I use it even with Linq / IQueryable Some properties of the linq entities should be editable in the app so I set them to two-way mode. That would change the object in the observableCollection. 3) Is the object in the ObservableCollection still a instance of the original linq entity and so is the change reflected in the database ( when submitchanges is called ) I should have somekind of save method in the repository. But when should I call it? What happens if someone edits a field but decides not to save it, goes to another object and edits it and then press save. Doesn't the original change also save? When does it not remember the changes to a linq entity object anymore. Should I instance the Datacontext class in each method so it loses scope when done. 4) When and how to call the SubmitChanges method 5) Should I have the DataContext as a member variable of the repository class or a method variable To add a new row I should create a new object in a event ( "new" button push ) and then add it to the database using a repo method. 6) When I add the object to the database there will be no new object in the ObservableCollection. Do I refresh somehow. 7) I wan't to reuse the edit window when creating new but not sure how to dynamically changing from referencing selected item from a listview to this new object. Any examples you can point out.

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  • Are .dll files loaded once for every program or once for all programs?

    - by Nilbert
    I have a simple small question which someone who knows will be able to answer easily, I searched google but couldn't find the answer. There are many programs running at once on a computer, and my question is: when a program loads a DLL, does it actually load the DLL file or does it find the memory in which the DLL is already loaded? For example, is ws2_32.dll (winsock 2) loaded for every program that uses winsock, or is it loaded once and all programs that use it use the same memory addresses to call the functions?

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  • Getting started with nbehave

    - by dotnetdev
    Hi, I am looking at using BDD, however, when evaluating the stories/conditions I write (using nBehave), how do I check if the story passes? Do I write another library with test methods? For example, if I want to test a site for having a link called "About", do I write a method which can check this and then another method in another class library which can call the method to check the link via lambda syntax and add the relevant test and bdd attributes? Thanks

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  • How should Application.Run() be called for the main presenter of a MVP WinForms app?

    - by Mr Roys
    I'm learning to apply MVP to a simple WinForms app (only one form) in C# and encountered an issue while creating the main presenter in static void Main(). Is it a good idea to expose a View from the Presenter in order to supply it as a parameter to Application.Run()? Currently, I've implemented an approach which allows me to not expose the View as a property of Presenter: static void Main() { IView view = new View(); Model model = new Model(); Presenter presenter = new Presenter(view, model); presenter.Start(); Application.Run(); } The Start and Stop methods in Presenter: public void Start() { view.Start(); } public void Stop() { view.Stop(); } The Start and Stop methods in View (a Windows Form): public void Start() { this.Show(); } public void Stop() { // only way to close a message loop called // via Application.Run(); without a Form parameter Application.Exit(); } The Application.Exit() call seems like an inelegant way to close the Form (and the application). The other alternative would be to expose the View as a public property of the Presenter in order to call Application.Run() with a Form parameter. static void Main() { IView view = new View(); Model model = new Model(); Presenter presenter = new Presenter(view, model); Application.Run(presenter.View); } The Start and Stop methods in Presenter remain the same. An additional property is added to return the View as a Form: public void Start() { view.Start(); } public void Stop() { view.Stop(); } // New property to return view as a Form for Application.Run(Form form); public System.Windows.Form View { get { return view as Form(); } } The Start and Stop methods in View (a Windows Form) would then be written as below: public void Start() { this.Show(); } public void Stop() { this.Close(); } Could anyone suggest which is the better approach and why? Or there even better ways to resolve this issue?

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  • How to fix this python error? OverflowError: cannot convert float infinity to integer

    - by aF
    Hello, it gives me this error: Traceback (most recent call last): File "C:\Users\Public\SoundLog\Code\Código Python\SoundLog\Plugins\NoisePlugin.py", line 113, in onPaint dc.DrawLine(valueWI, valueHI, valueWF, valueHF) File "C:\Python26\lib\site-packages\wx-2.8-msw-unicode\wx\_gdi.py", line 3177, in DrawLine return _gdi_.DC_DrawLine(*args, **kwargs) OverflowError: cannot convert float infinity to integer How can I avoid this to happen? Thanks in advance ;)

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  • What's with "foo" and "bar" [closed]

    - by Matt S.
    Possible Duplicates: When foo and bar is not enough Code examples Foo Bar I've always wondered, why is there always "foo" and "bar" named as variables in most tutorials I've seen. Where did it come from? Why do we call them "foo" and "bar" why not something else?

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  • insert multiple elements in string in python

    - by Anurag Sharma
    I have to build a string like this { name: "john", url: "www.dkd.com", email: "[email protected]" } where john, www.dkd.com and [email protected] are to be supplied by variables I tried to do the following s1 = "{'name:' {0},'url:' {1},'emailid:' {2}}" s1.format("john","www.dkd.com","[email protected]") I am getting the following error Traceback (most recent call last): File "<stdin>", line 1, in <module> KeyError: "'name" Dont able to understand what I am doing wrong

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  • How to pass an IronPython instance method to a (C#) function parameter of type `Func<Foo>`

    - by Daren Thomas
    I am trying to assign an IronPython instance method to a C# Func<Foo> parameter. In C# I would have a method like: public class CSharpClass { public void DoSomething(Func<Foo> something) { var foo = something() } } And call it from IronPython like this: class IronPythonClass: def foobar(): return Foo() CSharpClass().DoSomething(foobar) But I'm getting the following error: TypeError: expected Func[Foo], got instancemethod

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  • php 5.3.2 + MS SQL (can`t connect)

    - by Dezigo
    I allways used php 5.2.3 version ,but now I updated php to 5.3.2 version. I have problem with mssql,I can`t connect to mssql server. I have downloaded a sql server driver for php 1.1 There are a lot of files, i used 'php_sqlsrv_53_ts_vc9' Put it on php/ext directory 'php_sqlsrv_53_ts_vc9' I have added - extension=php_sqlsrv_53_ts_vc9.dll (in php.ini),but it`s give an error Call to undefined function mssql_connect() in C:\webserver\www\MSSQl\db_mssql.class.php on line 26

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  • Python multiprocessing global variable updates not returned to parent

    - by user1459256
    I am trying to return values from subprocesses but these values are unfortunately unpicklable. So I used global variables in threads module with success but have not been able to retrieve updates done in subprocesses when using multiprocessing module. I hope I'm missing something. The results printed at the end are always the same as initial values given the vars dataDV03 and dataDV04. The subprocesses are updating these global variables but these global variables remain unchanged in the parent. import multiprocessing # NOT ABLE to get python to return values in passed variables. ants = ['DV03', 'DV04'] dataDV03 = ['', ''] dataDV04 = {'driver': '', 'status': ''} def getDV03CclDrivers(lib): # call global variable global dataDV03 dataDV03[1] = 1 dataDV03[0] = 0 # eval( 'CCL.' + lib + '.' + lib + '( "DV03" )' ) these are unpicklable instantiations def getDV04CclDrivers(lib, dataDV04): # pass global variable dataDV04['driver'] = 0 # eval( 'CCL.' + lib + '.' + lib + '( "DV04" )' ) if __name__ == "__main__": jobs = [] if 'DV03' in ants: j = multiprocessing.Process(target=getDV03CclDrivers, args=('LORR',)) jobs.append(j) if 'DV04' in ants: j = multiprocessing.Process(target=getDV04CclDrivers, args=('LORR', dataDV04)) jobs.append(j) for j in jobs: j.start() for j in jobs: j.join() print 'Results:\n' print 'DV03', dataDV03 print 'DV04', dataDV04 I cannot post to my question so will try to edit the original. Here is the object that is not picklable: In [1]: from CCL import LORR In [2]: lorr=LORR.LORR('DV20', None) In [3]: lorr Out[3]: <CCL.LORR.LORR instance at 0x94b188c> This is the error returned when I use a multiprocessing.Pool to return the instance back to the parent: Thread getCcl (('DV20', 'LORR'),) Process PoolWorker-1: Traceback (most recent call last): File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/process.py", line 232, in _bootstrap self.run() File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/process.py", line 88, in run self._target(*self._args, **self._kwargs) File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/pool.py", line 71, in worker put((job, i, result)) File "/alma/ACS-10.1/casa/lib/python2.6/multiprocessing/queues.py", line 366, in put return send(obj) UnpickleableError: Cannot pickle <type 'thread.lock'> objects In [5]: dir(lorr) Out[5]: ['GET_AMBIENT_TEMPERATURE', 'GET_CAN_ERROR', 'GET_CAN_ERROR_COUNT', 'GET_CHANNEL_NUMBER', 'GET_COUNT_PER_C_OP', 'GET_COUNT_REMAINING_OP', 'GET_DCM_LOCKED', 'GET_EFC_125_MHZ', 'GET_EFC_COMB_LINE_PLL', 'GET_ERROR_CODE_LAST_CAN_ERROR', 'GET_INTERNAL_SLAVE_ERROR_CODE', 'GET_MAGNITUDE_CELSIUS_OP', 'GET_MAJOR_REV_LEVEL', 'GET_MINOR_REV_LEVEL', 'GET_MODULE_CODES_CDAY', 'GET_MODULE_CODES_CMONTH', 'GET_MODULE_CODES_DIG1', 'GET_MODULE_CODES_DIG2', 'GET_MODULE_CODES_DIG4', 'GET_MODULE_CODES_DIG6', 'GET_MODULE_CODES_SERIAL', 'GET_MODULE_CODES_VERSION_MAJOR', 'GET_MODULE_CODES_VERSION_MINOR', 'GET_MODULE_CODES_YEAR', 'GET_NODE_ADDRESS', 'GET_OPTICAL_POWER_OFF', 'GET_OUTPUT_125MHZ_LOCKED', 'GET_OUTPUT_2GHZ_LOCKED', 'GET_PATCH_LEVEL', 'GET_POWER_SUPPLY_12V_NOT_OK', 'GET_POWER_SUPPLY_15V_NOT_OK', 'GET_PROTOCOL_MAJOR_REV_LEVEL', 'GET_PROTOCOL_MINOR_REV_LEVEL', 'GET_PROTOCOL_PATCH_LEVEL', 'GET_PROTOCOL_REV_LEVEL', 'GET_PWR_125_MHZ', 'GET_PWR_25_MHZ', 'GET_PWR_2_GHZ', 'GET_READ_MODULE_CODES', 'GET_RX_OPT_PWR', 'GET_SERIAL_NUMBER', 'GET_SIGN_OP', 'GET_STATUS', 'GET_SW_REV_LEVEL', 'GET_TE_LENGTH', 'GET_TE_LONG_FLAG_SET', 'GET_TE_OFFSET_COUNTER', 'GET_TE_SHORT_FLAG_SET', 'GET_TRANS_NUM', 'GET_VDC_12', 'GET_VDC_15', 'GET_VDC_7', 'GET_VDC_MINUS_7', 'SET_CLEAR_FLAGS', 'SET_FPGA_LOGIC_RESET', 'SET_RESET_AMBSI', 'SET_RESET_DEVICE', 'SET_RESYNC_TE', 'STATUS', '_HardwareDevice__componentName', '_HardwareDevice__hw', '_HardwareDevice__stickyFlag', '_LORRBase__logger', '__del__', '__doc__', '__init__', '__module__', '_devices', 'clearDeviceCommunicationErrorAlarm', 'getControlList', 'getDeviceCommunicationErrorCounter', 'getErrorMessage', 'getHwState', 'getInternalSlaveCanErrorMsg', 'getLastCanErrorMsg', 'getMonitorList', 'hwConfigure', 'hwDiagnostic', 'hwInitialize', 'hwOperational', 'hwSimulation', 'hwStart', 'hwStop', 'inErrorState', 'isMonitoring', 'isSimulated'] In [6]:

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  • how to use @ in python..

    - by zjm1126
    this is my code: def a(): print 'sss' @a() def b(): print 'aaa' b() and the Traceback is: sss Traceback (most recent call last): File "D:\zjm_code\a.py", line 8, in <module> @a() TypeError: 'NoneType' object is not callable so how to use the '@' thanks

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  • Is there a way to catch Fatal error in PHP?

    - by Josef Sábl
    I have this line of PHP code: thisFunctionDoesNotExist(); And it stops script execution with: Fatal error: Call to undefined function I tried using set_error_handler and it does help for warning type of errors. But not for fatal errors. As I understand it from various threads on internet it should be possible to handle by set_error_handler, but I cannot make it work. Can you please post working example?

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  • CallLogs in Blackberry

    - by Farhan
    Hi, i am working on CallLogs Sync Application in Blackberry and partially i have done it, one point that i didn't understand is how to add information to CallLogs. I have retrieved information from CallLogs and Store on Server but now i retrieved information from Server but how to add info to CallLogs didn't come in my mind as i retrieved all the information in Strings from Server and PhoneCallLog Constructor look like this: PhoneCallLog call = new PhoneCallLog(Date,int Type,int Duration,int Status,participantID participant,String Notes); Please tell me as soon as Possible, i will be very thankful to you.

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  • Performance of a proposed JEE architecture

    - by kineas
    I have concerns about the performance of the following architecture: j2ee application in an appserver, ejb session bean and DAOs remote (rich) client, a swing app. A classic, form-based client only one stateless ejb, the ejb is accessed via web services, not rmi, through a homegrown framework each web service request will get authenticated against an LDAP no state stored on the server, only client-side sessions I guess working on the rich GUI will involve a remote call in every 2-10 seconds, or more, per user. What do you think?

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  • How to make multiple queries with PHP prepared statements (Commands out of sync error)

    - by Tirithen
    I'm trying to run three MySQL queries from a PHP script, the first one works fine, but on the second one I get the "Commands out of sync; you can’t run this command now" error. I have managed to understand that I need to "empty" the resultset before preparing a new query but I can't seem to understand how. I thought that $statement-close; would do that for me. Here is the relevant part of the code: <?php $statement = $db_conn->prepare("CALL getSketches(?,?)"); // Prepare SQL routine to check if user is accepted $statement->bind_param("is", $user_id, $loaded_sketches); // Bind variables to send $statement->execute(); // Execute the query $statement->bind_result( // Set return varables $id, $name, $description, $visibility, $createdby_id, $createdby_name, $createdon, $permission ); $new_sketches_id = array(); while($statement->fetch()) { $result['newSketches'][$id] = array( "name" => $name, "description" => $description, "visibility" => $visibility, "createdById" => $createdby_id, "createdByName" => $createdby_name, "createdOn" => $createdon, "permission" => $permission ); $new_sketches_id[] = $id; } $statement->close; // Close satement $new_sketches_ids = implode(",", $new_sketches_id); // Get the new sketches elements $statement = $db_conn->prepare("CALL getElements(?,'',?,'00000000000000')"); // Prepare SQL routine to check if user is accepted // The script crashes here with $db_conn->error // "Commands out of sync; you can't run this command now" $statement->bind_param("si", $new_sketches_ids, $user_id); // Bind variables to send $statement->execute(); // Execute the query $statement->bind_result( // Set return varables $id, $user_id, $type, $attribute_d, $attribute_stroke, $attribute_strokeWidth, $sketch_id, $createdon ); while($statement->fetch()) { $result['newSketches'][$sketch_id]['newElements']["u".$user_id."e".$id] = array( "type" => $type, "d" => $attribute_d, "stroke" => $attribute_stroke, "strokeWidth" => $attribute_strokeWidth, ); } $statement->close; // Close satement ?> How can I make the second query without closing and reopening the entire database connection?

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