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• Boost Python - Limits to the number of arguments when wrapping a function

  - by Derek

  I'm using Boost Python to wrap some C++ functions that I've created. One of my C++ functions contains 22 arguments. Boost complains when I try to compile my solution with this function, and I'm trying to figure out if it is just because this function has too many arguments. Does anyone know if such a limit exists? I've copied the error I'm getting below, not the code because I figure someone either knows the answer to this or not - and if there is no limit then I'll just try to figure it out myself. Thanks very much in advance! Here is a copy of the beginning of the error message I receive... 1>main.cpp 1>c:\cpp_ext\boost\boost_1_47\boost\python\make_function.hpp(76): error C2780: 'boost::mpl::vector17<RT,most_derived<Target,ClassT>::type&,T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14> boost::python::detail::get_signature(RT (__thiscall ClassT::* )(T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14) volatile const,Target *)' : expects 2 arguments - 1 provided 1>c:\cpp_ext\boost\boost_1_47\boost\python\signature.hpp(236) : see declaration of 'boost::python::detail::get_signature' And eventually I get about a hundred copies of error messages very much resembling this one: 1>c:\cpp_ext\boost\boost_1_47\boost\python\make_function.hpp(76): error C2784: 'boost::mpl::vector17<RT,ClassT&,T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14> boost::python::detail::get_signature(RT (__thiscall ClassT::* )(T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14) volatile const)' : could not deduce template argument for 'RT (__thiscall ClassT::* )(T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14) volatile const' from 'std::string (__cdecl *)(const std::string &,jal::date::JULIAN_DATE,const std::string &,const std::string &,int,const std::string &,const std::string &,const std::string &,const std::string &,const std::string &,const std::string &,int,const std::string &,const std::string &,int,const std::string &,const std::string &,const std::string &,const std::string &,const std::string &,int,const std::string &)' 1> c:\cpp_ext\boost\boost_1_47\boost\python\signature.hpp(218) : see declaration of 'boost::python::detail::get_signature' 1>c:\cpp_ext\boost\boost_1_47\boost\python\make_function.hpp(76): error C2780: 'boost::mpl::vector17<RT,most_derived<Target,ClassT>::type&,T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14> boost::python::detail::get_signature(RT (__thiscall ClassT::* )(T0,T1,T2,T3,T4,T5,T6,T7,T8,T9,T10,T11,T12,T13,T14) volatile,Target *)' : expects 2 arguments - 1 provided 1> c:\cpp_ext\boost\boost_1_47\boost\python\signature.hpp(236) : see declaration of 'boost::python::detail::get_signature'

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• How to achieve syncronization in loadbalanced multiserver environment

  - by Anoop

  Hi, I have to create a .net web application which would run on more than one front end server which are load balanced. Now I have to use some third party api which is not thread safe so only one thread should call the API at a time so I have to some use syncronization machanism like lock or mutex which provide syncronisation within the process and across the process in machine.Now will lock or mutex work in loadbalanced multiserver environment correctly? If not then is there any mechanism using which I can syncronise all the threads in all the machines??

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• Prevent PHP from sending the PHPSESSID cookie with requests?

  - by Nirmal

  I am serving dynamic image content which is generated by PHP. But for such requests to a .php file, the PHPSESSID cookie is being sent along, which is a waste. Is it possible to prevent PHP from sending this cookie with requests to a PHP file? Or is it completely necessary for PHP to work? Thanks for your time!

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• Django Python Macports

  - by MacPython

  I installed Django via Macports. I wasted a lot of time on making it work. It still does not work. I would like to COMPLETELY uninstall Django (Macports) and install with the easy install (DJANGO). I would like to keep Macports and not uninstall it, because I read it SHOULD be useful. How can I achieve this? Thank you for your attention.

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• c# Uploading files to ftp server

  - by etarvt

  Hi there, I have a problem with uploading files to ftp server. I have a few buttons. Every button uploads different files to the ftp. The first time when a button is clicked the file is uploaded successfully, but the second and later tries fail. It gives me "The operation has timed out". When I close the site and then open it again I can upload again only one file. I am sure that I can override files on the ftp. Here's the code: protected void btn_export_OnClick(object sender, EventArgs e) { Stream stream = new MemoryStream(); stream.Position = 0; // fill the stream bool res = this.UploadFile(stream, "test.csv", "dir"); stream.Close(); } private bool UploadFile(Stream stream, string filename, string ftp_dir) { stream.Seek(0, SeekOrigin.Begin); string uri = String.Format("ftp://{0}/{1}/{2}", "host", ftp_dir, filename); try { FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(uri)); reqFTP.Credentials = new NetworkCredential("user", "pass"); reqFTP.Method = WebRequestMethods.Ftp.UploadFile; reqFTP.KeepAlive = false; reqFTP.UseBinary = true; reqFTP.UsePassive = true; reqFTP.ContentLength = stream.Length; reqFTP.EnableSsl = true; // it's FTPES type of ftp int buffLen = 2048; byte[] buff = new byte[buffLen]; int contentLen; try { Stream ftpStream = reqFTP.GetRequestStream(); contentLen = stream.Read(buff, 0, buffLen); while (contentLen != 0) { ftpStream.Write(buff, 0, contentLen); contentLen = stream.Read(buff, 0, buffLen); } ftpStream.Flush(); ftpStream.Close(); } catch (Exception exc) { this.lbl_error.Text = "Error:<br />" + exc.Message; this.lbl_error.Visible = true; return false; } } catch (Exception exc) { this.lbl_error.Text = "Error:<br />" + exc.Message; this.lbl_error.Visible = true; return false; } return true; } Does anyone have idea what may cause this strange behaviour? I think I'm closing all streams accurately. Could this be related with the ftp server settings? The admin said that the ftp handshake never happened second time.

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• Increasing number of image per second with flash ?

  - by Hugues Van Landeghem

  Hi all, I'm beginner in Flash CS4 and I'd like to know how to increase the number of image per second of my sequence because I want more smooth morphing. The time will not change. Actually, I have 24 image per second and I'd like to put 48. Is there a way to make it automatically without changing all by hand. Thanks

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• How to hunt down a long running request in Rails

  - by Jake

  We have a customer complaining about a long running request. I found the request in the production.log but am not sure how to dig deeper into figuring out why it took so long. Is there any artifacts in the log that I should look for? Also the DB and View times don't add up to the total request time.

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• php frameworks - build your own vs pre-made

  - by christopher-mccann

  Hi, I am building an application currently in PHP and I am trying to decide on whether to use a pre-existing framework like codeigniter or build my own framework. The application needs to be really scalable and I want to be completely in control of it which makes me think I should build my own but at the same time I dont want to reinvent the wheel if I dont have to. Any advice greatly appreciated. Thanks

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• How to change the primary key to be non-clustered?

  - by AngryHacker

  Part-time reluctant DBA here. I want to change an existing primary key index from clustered to non-clustered. And the syntax is escaping me. This is how it's scripted out right now. ALTER TABLE [dbo].[Config] WITH NOCHECK ADD CONSTRAINT [PK_Config] PRIMARY KEY CLUSTERED ( [ConfigID] ) ON [PRIMARY] I am not seeing an ALTER CONSTRAINT statement in the online docs.

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• Regex slow on Windows Server 2008

  - by pjmyburg

  Hi I have a situation where my regular expressions compile extremely slowly on Windows Server 2008. I wrote a small console application to highlight this issue. The app generates its own input and builds up a Regex from words in an XML file. I built a release version of this app and ran it both on my personal laptop (running XP) and the Windows 2008 server. The regular expression took 0.21 seconds to compile on my laptop, but 23 seconds to compile on the server. Any ideas what could be causing this? The problem is only on first use of the Regex (when it is first compiled - thereafter it is fine) I have also found another problem - when using \s+ in the regular expression on the same Windows 2008 server, the memory balloons (uses 4GB+) and the compilation of the Regex never finishes. Is there a known issue with Regex and 64 bit .net? Is there a fix/patch available for this? I cannot really find any info on the net, but I have found a few articles about this same issues in Framework 2.0 - surely this has been fixed by now? More info: The server is running the 64 bit version of the .net framework (3.5 SP1) and on my laptop I have Visual Studio 2008 and the 3.5 framework installed. The regular expression is of the following pattern: ^word$|^word$|^word$ and is constructed with the following flags: RegexOptions.IgnoreCase | RegexOptions.Compiled Edit: Here is a code snippet: StringBuilder regexString = new StringBuilder(); if (!String.IsNullOrEmpty(fileLocation)) { XmlTextReader textReader = new XmlTextReader(fileLocation); textReader.Read(); while (textReader.Read()) { textReader.MoveToElement(); if (textReader.Name == "word") { regexString.Append("^" + textReader.GetAttribute(0) + "$|"); } } ProfanityFilter = new Regex(regexString.ToString(0, regexString.Length - 1), RegexOptions.IgnoreCase | RegexOptions.Compiled); } DateTime time = DateTime.Now; Console.WriteLine("\nIsProfane:\n" + ProfanityFilter.IsMatch("test")); Console.WriteLine("\nTime: " + (DateTime.Now - time).TotalSeconds); Console.ReadKey(); This results in a time of 0.21 seconds on my laptop and 23 seconds on the 2008 server. The XML file consists of 168 words in the following format: <word text="test" />

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• Maven Embedded Glassfish Plugin - how to set the temporary directory?

  - by Walter White

  Hi all, I am using the Maven Embedded Glassfish Plugin and it works great, but unfortunately it creates a temporary directory in my main project directory. I would like it to use target so that every time I clean the project, the embedded directory also gets wiped. Is there a setting for that? Walter

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• How to see if a user is following you on Twitter using C# Twitter API wrapper Tweetsharp

  - by developr

  Without looping through the followers 5k at a time, is there any way to see if a user is following another user? Also, if the user enters their login info, is there any way to use the API to set them to follow you? If these are not possible in tweetsharp, is there another API that has this support?

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• sqlite database, RoR and VCS

  - by ryanprayogo

  What is the common way of dealing with the development.sqlite3 files with VCS (in particular, git)? If I commit this file to the VCS, will it be merged with another developer's copy? Or should each developer run the db:migrate task each time a new migration file is created?

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• Data denormalization and C# objects DB serialization

  - by Robert Koritnik

  I'm using a DB table with various different entities. This means that I can't have an arbitrary number of fields in it to save all kinds of different entities. I want instead save just the most important fields (dates, reference IDs - kind of foreign key to various other tables, most important text fields etc.) and an additional text field where I'd like to store more complete object data. the most obvious solution would be to use XML strings and store those. The second most obvious choice would be JSON, that usually shorter and probably also faster to serialize/deserialize... And is probably also faster. But is it really? My objects also wouldn't need to be strictly serializable, because JsonSerializer is usually able to serialize anything. Even anonymous objects, that may as well be used here. What would be the most optimal solution to solve this problem? Additional info My DB is highly normalised and I'm using Entity Framework, but for the purpose of having external super-fast fulltext search functionality I'm sacrificing a bit DB denormalisation. Just for the info I'm using SphinxSE on top of MySql. Sphinx would return row IDs that I would use to fast query my index optimised conglomerate table to get most important data from it much much faster than querying multiple tables all over my DB. My table would have columns like: RowID (auto increment) EntityID (of the actual entity - but not directly related because this would have to point to different tables) EntityType (so I would be able to get the actual entity if needed) DateAdded (record timestamp when it's been added into this table) Title Metadata (serialized data related to particular entity type) This table would be indexed with SPHINX indexer. When I would search for data using this indexer I would provide a series of EntityIDs and a limit date. Indexer would have to return a very limited paged amount of RowIDs ordered by DateAdded (descending). I would then just join these RowIDs to my table and get relevant results. So this won't actually be full text search but a filtering search. Getting RowIDs would be very fast this way and getting results back from the table would be much faster than comparing EntityIDs and DateAdded comparisons even though they would be properly indexed.

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• C# Projects for study

  - by Chandra

  I need to learn C# for my Internship. I would not like to start programming top down reading a Ebook. I would like to set a Goal for myself and then try to achieve it Programmatically. So, I am here to ask your help, if you could suggest me some interesting projects which will help me in Learning C# efficiently and quickly. I have previous programming experience, programming in C,C++ and Matlab. Thanks for your time Chandra

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• Sockets server design advice

  - by Rob

  We are writing a socket server in c# and need some advice on the design. Background: Clients (from mobile devices) connect to our server app and we leave their socket open so we can send data back down to them whenever we need to. The amount of data varies but we generally send/receive data from each client every few seconds, so it's quite intensive. The amount of simultaneous connections can range from 50-500 (and more in the future). We have already written a server app using async sockets and it works, however we've come across some stumbling blocks and we need to make sure that what we're doing is correct. We have a collection which holds our client states (we have no socket/connection pool at the moment, should we?). Each time a client connects we create a socket and then wait for them to send us some data and in receiveCallBack we add their clientstate object to our connections dictionary (once we have verified who they are). When a client object then signs off we shutdown their socket and then close it as well as remove them from our collection of clients dictionary. Presumably everything happens in the right order, everything works as expected. However, almost everyday it stops accepting connections, or so we think, either that or it connects but doesn't actually do anything past that and we can't work out why it's just stopping. There are few things that we'r'e unsure about 1) Should we be creating some kind of connection pool as opposed to just a dictionary of client sockets 2) What happens to the sockets that connect but then don't get added to our dictionary, they just linger around in memory doing nothing, should we create ANOTHER dictionary that holds the sockets as soon as they are created? 3) What's the best way of finding if clients are no longer connected? We've read some many methods but we're not sure of the best one to use, send data or read data, if so how? 4) If we loop through the connections dictonary to check for disposed clients, should we be locking the dictionary, if so how does this affect other clients objects trying to use it at the same time, will it throw an error or just wait? 5) We often get disposedSocketException within ReceiveCallBack method at random times, does this mean we are safe to remove that socket from the collection? We can't seem to find any production type examples which show any of this working. Any advice would be greatly received

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• How we implement "Please wait ...." screen in flex when app is busy

  - by Atul Yadav

  I have button default setting in my app. when i click on that button it change all the setting value to default value. this process takes time. so i want a "Please wait..." screen comes as a pop up and when the process is completed then it comes. Thanks Atul yadav

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• Sleep Command in T-SQL?

  - by skb

  Is there to way write a T-SQL command to just make it sleep for a period of time? I am writing a web service asynchronously and I want to be able to run some tests to see if the asynchronous pattern is really going to make it more scalable. In order to "mock" an external service that is slow, I want to be able to call a SQL server with a script that runs slowly, but isn't actually processing a ton of stuff.

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• Format relative dates

  - by Jeffrey Aylesworth

  Is there a ruby gem that will format dates relative to the current time? I want output like "Tomorrow at 5pm", "Thursday next week at 5:15pm", I'm not too concerned about the exact output, just as long as it's relative dates in natural language

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• Windows forms application blocks after station lock

  - by Silviu

  We're having a serious issue at work. We've discovered that after the station where the client was running is locked/unlocked the client is blocked. No repaint. So the UI thread is blocked with something. Looking at the callstack of the UI thread (thread 0) using windbg we see that a UserPreferenceChanged event gets raised. It is marshalled through a WindowsFormsSynchronizationContext using it's controlToSend field to the UI. It gets blocked by a call to the marshalling control. The method called is MarshaledInvoke it builds a ThreadMethodEntry entry = new ThreadMethodEntry(caller, method, args, synchronous, executionContext); This entry is supposed to do the magic. The call is a synchronous call and because of that (still in the MarshaledInvoke of the Control class) the wait call is reached: if (!entry.IsCompleted) { this.WaitForWaitHandle(entry.AsyncWaitHandle); } The last thing that i can see on the stack is the WaitOne called on the previously mentioned AsyncWaitHandle. This is very annoying because having just the callstack of the runtime and not one of our methods being invoked we cannot really point to a bug in our code. I might be wrong, but I'm guessing that the marshaling control is not "marshaling" to the ui thread. But another one...i don't really know which one because the other threads are being used by us and are blocked...maybe this is the issue. But none of the other threads are running a message loop. This is very annoying. We had some issues in the past with marshaling controls to the right ui thread. That is because the first form that is constructed is a splash form. Which is not the main form. We used to use the main form to marshal call to the ui thread. But from time to time some calls would go to a non ui thread and some grids would broke with a big red X on them. I fixed this by creating a specific class: public class WindowsFormsSynchronizer { private static readonly WindowsFormsSynchronizationContext = new WindowsFormsSynchronizationContext(); //Methods are following that would build the same interface of the synchronization context. } This class gets build as one of the first objects in the first form being constructed. We've noticed some other strange thing. Looking at the heap there are 7 WindowsFormsSynchronizationContext objects. 6 of these have the same instance of controlToSend, and the other one has some different instance of controlToSend. This last one is the one that should marshal the calls to the UI. I don't have any other idea...maybe some of you guys had this same issue?

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• Telesense not finding methods

  - by Eric

  I'm working in Asp.net and telesense isn't finding the methods in app code. It executes the code well without any issue at run time, but I'm not able to see the method names while coding. Any idea how to fix this? Thanks in advance

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• How to totally uninstall Adobe Flash CS4 from mac computer

  - by Nava Carmon

  I've installed a trial of Adobe Flash CS4 (i didn't use this trial till the end) and wrongly entered the expired license number. I ran uninstall and tried to install a trial version again. Seems, that it keeps somewhere the wrong serial number and each time i run the Flash application it alerts me, that the license has expired. How do i properly install the trial? Do i have a chance at all? Thanks a lot!

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• In Dashcode, with iPhone webkit, how to add a new page?

  - by SimpleCode

  I'm working on a website for iphone using dashcode. But i don't know how to add a new html page to the 'site'. I could use stackLayout but it takes so much time to load the 'index.html' since it has all the stackLayout's views in it. enlightenment needed :)

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• Where can I find good tutorials on XSL-FO (Formating/ed Objects), the stuff one feeds to fop and get

  - by Gustavo Carreno

  On a company that I've worked, me and my colleagues, implemented a tailored document distribution system on top of XSL-FO. My task was to get the script to deliver the documents and configure the CUPS print server and the Fax server, so I never had the time to get my hands dirty on XSL-FO. I'm thinking of implementing something in the region that was made there but I'll need some templates to work with while testing. Where can I find some good tutorials on XSL-FO, since the fop process I've mastered already?

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• How to change the title bar text of Visual Studio

  - by ProfK

  We work on several different branches of the same code, and when working on two branches at once, it can become confusing and time wasting. Presently, the VS title bar has the text <solution-name> - Visual Studio. Is it possible for me to write an extension that will make that text <solution-name>: <branch-name> - <Visual Studio>?

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