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Search found 7891 results on 316 pages for 'multi layer perceptron'.

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• MTU mismatch between GetIfEntry and netsh

  - by ChrisJ

  I'm working on pseudo-transport layer software that runs over UDP, providing reliable connection-oriented transmission, as an alternative to TCP. In order to maximize network efficiency, we query the MTU of the "best" network adapter upon initialization. MIB_IFROW row = {0}; row.dwIndex = dwBestIfIndex; dwRes = GetIfEntry(&row); Searching online I found that you can use the following netsh commands to query for this same value, from a command prompt (not a C++ API) netsh interface ipv4 show interfaces netsh interface ipv4 show subinterfaces The troubling issue is that while row.dwMtu may be set to 1500, snooping the network traffic on the sending laptop shows that our packets are fragmented into 1300 byte packets. netsh also reports that the MTU is 1300. Clearly the value reported by netsh command is the actual used values. Anyone know what API I can call to get the same values as netsh?

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• What useful GDB scripts have you used/written?

  - by nik

  People use gdb on and off for debugging, of course there are lots of other debugging tools across the varied OSes, with and without GUI and, maybe other fancy IDE features. I would like to know what useful gdb scripts you have written and liked. While, I do not mean a dump of commands in a something.gdb file that you source to pull out a bunch of data, if that made your day, go ahead and talk about it. Lets think conditional processing, control loops and functions written for more elegant and refined programming to debug and, maybe even for whitebox testing Things get interesting when you start debugging remote systems (say, over a serial/ethernet interface) And, what if the target is a multi-processor (and, multithreaded) system Let me put a simple case as an example... Say, A script that traversed serially over entries to locate a bad entry in a large hash-table that is implemented on an embedded platform. That helped me debug a broken hash-table once.

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• Mapping table and a simple view with Fluent NHibernate

  - by adrin

  I have mapped a simple entity, let's say an invoice using Fluent NHibernate, everything works fine... after a while it turns out that very frequently i need to process 'sent invoices' (by sent invoices we mean all entities that fulfill invoice.sent==true condition)... is there a way to easily abstract 'sent invoices' in terms of my data access layer? I dont like the idea of having aforementioned condition repeated in half of my repository methods. I thought that using a simple filtering view would be optimal, but how could it be done? Maybe I am doing it terribly wrong and someone would help me realize it :)?

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• XML deserialization doesn't read in second level

  - by Andy

  Sorry if the title doesn't make much sense, but I'm not too familiar with the terminology. My question is: I have a config.xml file for a program I'm working on. I created an xsd file by 'xsd.exe config.xml'. I then took this xsd and added it to the solution in visual studio. My last step used a program called xsd2code that turned that xsd file into a class I can serialize too. The problem is it doesn't read more then a layer deep in the xml tree. By this I mean the elements in the root node get deserialized into my object, but those that are in a node inside the root node are not. I found this out by putting a breakpoint after the deserialization and looking at my object. Any Ideas? Let me know if this needs some clarification or you need a snippet of something.

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• Converting array to Drupal format

  - by theo

  Hi all, This statement gives me the value I want in Drupal (namely the last user role): global $user; return (end($user->roles)); however I need to convert it to this format: return array( 0 => array('value' => value for value), // You'll usually want to stop here. Provide more values // if you want your 'default value' to be multi-valued: 1 => array('value' => value for value), 2 => ... ); and I've got no idea how to (also, is this format a multidimensional array?)... Any ideas? Thanks for any help, Theo.

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• C or C++ to write a compiler?

  - by H.Josef

  I want to write a compiler for a custom markup language, I want to get optimum performance and I also want to have a good scalable design. Multi-paradigm programming language (C++) is more suitable to implement modern design patterns, but I think that will degrade performance a little bit (think of RTTI for example) which more or less might make C a better choice. I wonder what is the best language (C, C++ or even objective C) if someone wants to create a modern compiler (in the sense of complying to modern software engineering principles as a software) that is fast, efficient, and well designed.

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• Speed Difference between native OLE DB and ADO.NET

  - by weijiajun

  I'm looking for suggestions as well as any benchmarks or observations people have. We are looking to rewrite our data access layer and are trying to decide between native C++ OLEDB or ADO.NET for connecting with databases. Currently we are specifically targeting Oracle which would mean we would use the Oracle OLE DB provider and the ODP.NET. Requirements: 1. All applications will be in managed code so using native C++ OLEDB would require C++/CLI to work (no PInvoke way to slow). 2. Application must work with multiple databases in the future, currently just targeting Oracle specifically. Question: 1. Would it be more performant to use ADO.NET to accomplish this or use native C++ OLE DB wrapped in a Managed C++ interface for managed code to access? Any ideas, or help or places to look on the web would be greatly appreciated.

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• Boost C++ Singleton error LNK2001: unresolved external symbol "private: static long Nsp::HL::flag" (

  - by Soós Roland

  I try to create a multi-threaded singleton pattern class. Header: class HL{ public: static HL* getInstance(); ......... private: static HL* instance; static boost::once_flag flag; HL(); static void initOnce(); } CPP: HL* HL::instance = NULL; HL* HL::getInstance(){ if(instance == NULL){ boost::call_once(flag, initOnce); } return instance; } void HL::initOnce(){ instance = new HL(); } I get this error: error LNK2001: unresolved external symbol "private: static long Nsp::HL::flag" (?flag@HL@Nsp@@0JA) What's wrong?

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• Most mind-blowing C++ hack you've ever seen?

  - by sblom

  In the same spirit as the "Hidden features of X?" series, what are the most mind-blowingly well-executed "I didn't even think the language could do that!" hacks that you've ever seen in C++. For example, my recent favorite is an implementation of the "operator" --> for pre-C++0x lambdas. Another fantastic example is Multi-dimensional analog literals. (Note: this is a community wiki question to avoid the appearance of reputation-whoring.)

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• Perl: Event-driven Programming

  - by Shiftbit

  Is there any POSIX signals that I could utilize in my perl program to create event-driven programming? Currently I have multi-process program that is able to cross communicate but my parent thread is only able to listen to listen at one child at a time. foreach (@threads) { sysread(${$_}{'read'}, my $line, 100); chomp($line); print "Parent hears: $line\n"; } The problem is that the parent sits in a continual wait state until it receives it a signal from the first child before it can continue on. I am relying on 'pipe' for my intercommunication. My current solution is very similar to: http://stackoverflow.com/questions/2558098/how-can-i-use-pipe-to-facilitate-interprocess-communication-in-perl If possible I would like to rely on a $SIG{...} event or any non-CPAN solution.

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• Sync Framework,LINQ, and my DAL

  - by Refracted Paladin

  I am creating a WPF app that needs to allow users to work in a temporary disconnected state and I plan to use a Local Database Cache. My question's are about my data access layer. Do you typically create the whole DAL to point at the Cache or both and create a switching mechanism? Is Entity's a good way to go for my DAL against the Cache? I am used to L2S but my understanding is that I can't use that against SQLCE, correct? Thanks! PS: Any good resources out there for using Sync, Linq, and WPF ALL TOGETHER? Tutorials, videos, etc?

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• Trying to access App.config file for mail settings but fails to work.

  - by mw

  Hello we have a Business Logic Layer which has an Email Services Class. In this class we have a method which will create an email(This part works and compiles fine). However when we try to access the app config file in order to test the method we get an error saying - Can't retrieve the app config mail settings and says all values are null when they are not. Here is the app config section for our code: <mailSettings> <smtp deliveryMethod="Network" from="[email protected]"> <network host="localhost" port="25" defaultCredentials="true"/> </smtp> </mailSettings> Here is there code we use to connect to the app.config: private System.Net.Configuration.MailSettingsSectionGroup mailSettings; SmtpClient client = new SmtpClient(mailSettings.Smtp.Network.Host, mailSettings.Smtp.Network.Port); What are we doing wrong here?

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• Debugging dynamic sql + dynamic tables in MS SQL Server 2008.

  - by Hamish Grubijan

  Hi, I have a messy stored procedure which uses dynamic sql. I can debug it in runtime by adding print @sql; where @sql; is the string containing the dynamic SQL, right before I call execute (@sql);. Now, the multi-page stored procedure also creates dynamic tables and uses them in a query. I want to print those tables to the console right before I do an execute, so that I know exactly what the query is trying to do. However, the SQL Server 08 does not like that. When I try: print #temp_table; and try to compile the S.P. I get this error: The name "#temp_table" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted. Please help.

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• PLEASE HELP unknown error [UIWindow endDisablingInterfaceAutorotation] ?

  - by iAm

  I am receiving this error. I have no clue as to why it would be called, and google didn't really help, any suggestions? -[UIWindow endDisablingInterfaceAutorotation] called on <UIWindow: 0x4e0ec50; frame = (0 0; 320 480); opaque = NO; autoresize = RM+BM; layer = <CALayer: 0x4e0f9e0>> without matching -beginDisablingInterfaceAutorotation. Ignoring.

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• Joda-Time: DateTime, DateMidnight and LocalDate usage

  - by fraido

  Joda-Time library includes different datetime classes DateTime - Immutable replacement for JDK Calendar DateMidnight - Immutable class representing a date where the time is forced to midnight LocalDateTime - Immutable class representing a local date and time (no time zone) I'm wondering how are you using these classes in your Layered Applications. I see advantages in having almost all the Interfaces using LocalDateTime (at the Service Layer at least) so that my Application doesn't have to manage Timezones and can safely assume Times always in UTC. My app could then use DateTime to manage Timezones at the very beginning of the Execution's Flow. I'm also wondering in which scenario can DateMidnight be useful.

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• MSVC 2008 - Unresolved External errors with LIB but only with DLL, not with EXE project

  - by Robert Oschler

  I have a DLL that I am trying to link with a libjpeg LIB using MSVC 2008 that is generating Unresolved External Symbol errors for the libjpeg functions. I also have a test project that links with the exact same libjpeg library file and links without error and runs fine too. I have triple-checked my LIB path and dependent LIBS list settings and literally copy and pasted them from the EXE project to the DLL project. I still get the errors. I do have the libjpeg include headers surrounded by extern "C" so it is not a name mangling issue and the unresolved external warnings show the "missing" libjpeg functions as undecorated (just a leading underscore and the @ sign parameter byte count suffix after each name). What could make the linker with the DLL project be unable to find the functions properly when the test EXE project has no trouble at all? I'm using the pre-compiled 32-bit static multi-threaded debug library which I downloaded from ClanLib. Thanks, Robert

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• Silverlight chart with behavior/bitmap image tooltip passthrough

  - by isitdanny

  I have a chart showing bound data as tooltips and it works well. I have added a magnifier(set of behaviors class) that captures a bitmap image at two times scale that shows in a circular area over the hover spot. The tooltip does not display. I have tried a custom tooltip service but cannot bind it to the behaviors. I added the tooltip to the behavior class and got a tooltip and data but could not move it with the magnifier. It just sits in the middle and laughs. I added a usercontrol "tooltip"-same issues, could not hook it to the magnifier behavior. I know I can probably build a popup, but really wanted to just pass through the bitmap layer with the tootip. Any ideas would be greatly appreciated. Danny

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• TMS320C64x Quick start reference for porgrammers

  - by osgx

  Hello Is thare any quickstart guide for programmers for writing DSP-accelerated appliations for TMS320C64x? I have a program with custom algorythm (not the fft, or usial filtering) and I want to accelerate it using multi-DSP coprocessor. So, how should I modify source to move computation from main CPU to DSPs? What limitations are there for DSP-running code? I have some experience with CUDA. In CUDA I should mark every function as being host, device, or entry point for device (kernel). There are also functions to start kernels and to upload/download data to/from GPU. There are also some limitations, for device code, described in CUDA Reference manual. I hope, there is an similar interface and a documentation for DSP.

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• My MS Access control displays no text for appended items following an append query

  - by Zaid

  The control in question is part of a datasheet-style subform that feeds off a multi-field combo-box. The control is bound to the first field of the combo box, an ID field which is hidden from view (column width set to zero). Consequently, the second field (Code) is displayed in the control when an item is selected from the combo box. I'm using a form button action to append values to this datasheet. It seems that because I need to INSERT ID values in, the control is unable to display the corresponding Code value. Nothing is visible, unless I go manually into the combo box and select an item from it. How can I get the control to display the Code value?

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• Explain Python extensions multithreading

  - by Checkers

  Python interpreter has a Global Interpreter Lock, and it is my understanding that extensions must acquire it in a multi-threaded environment. But Boost.Python HOWTO page says the extension function must release the GIL and reacquire it on exit. I want to resist temptation to guess here, so I would like to know what should be GIL locking patterns in the following scenarios: Extension is called from python (presumably running in a python thread). And extension's background thread calls back into Py_* functions. And a final question is, why the linked document says the GIL should be released and re-acquired?

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• PHP - Rotate a HEX color value (eg swap all colors with "next" hex)

  - by Joe

  I have a set of hex values in an array in PHP. On my page, I have a slider which the user can "slide" to return a value between 1-100. I want to then, based on this slider value, swap all the colors in the array based on the colors "next" color based on the position in the array. An example of the same sort of thing would be like in photshop where you can rotate the hue of a layer. I want to do the same thing, in PHP, for a hex value. Any clues?

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• Converting Asynchronous Programming Model (Begin/End methods) into event-based asynchronous model?

  - by David

  Let's say I have code that uses the Asynchronous Programming Model, i.e. it provides the following methods as a group which can be used synchronously or asynchronously: public MethodResult Operation(<method params>); public IAsyncResult BeginOperation(<method params>, AsyncCallback callback, object state); public MethodResult EndOperation(IAsyncResult ar); What I want to do is wrap this code with an additional layer that will transform it into the event-driven asynchronous model, like so: public void OperationAsync(<method params>); public event OperationCompletedEventHandler OperationCompleted; public delegate void OperationCompletedEventHandler(object sender, OperationCompletedEventArgs e); Does anyone have any guidance (or links to such guidance) on how to accomplish this?

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• Conditional Validation with Paperclip difficult

  - by Michael Schmitz

  Hi, I have an "item", which goes through a multi-page creation process. Images are uploaded at step five, and I keep track of the steps by using the attribute "complete". When validating whether an image is attached with paperclip, I get problems using the code below: validates_attachment_presence :pic1, :if => Proc.new { |u| u.complete == "step5"} It seems that I can't access the "complete" attribute, as the active-record object seems to be the paperclip image. Is there a way for me to check at which point in the process I am and validate conditionally? Thanks, Michael

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• SVN Authentication and authorization

  - by vijay.shad

  Hi, I have created a multi module maven project. Now I have shared the project with a internal SVN repository. Now I want to give authorization to user based on the module user is owner of. So if a user does not have right to a project; he/she will not be able to checkout the project form svn repository. But he/she will get a source release(sources.jar file) form maven repository for that project; if wanted. What should i do go get this done? My svn reposiroty is created by TortoiseSVN 1.6.6.

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• Why is thread local storage so slow?

  - by dsimcha

  I'm working on a custom mark-release style memory allocator for the D programming language that works by allocating from thread-local regions. It seems that the thread local storage bottleneck is causing a huge (~50%) slowdown in allocating memory from these regions compared to an otherwise identical single threaded version of the code, even after designing my code to have only one TLS lookup per allocation/deallocation. This is based on allocating/freeing memory a large number of times in a loop, and I'm trying to figure out if it's an artifact of my benchmarking method. My understanding is that thread local storage should basically just involve accessing something through an extra layer of indirection, similar to accessing a variable via a pointer. Is this incorrect? How much overhead does thread-local storage typically have? Note: Although I mention D, I'm also interested in general answers that aren't specific to D, since D's implementation of thread-local storage will likely improve if it is slower than the best implementations.

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