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  • How to help Open Source Softwares?

    - by Rajan Walia
    I know basic C++ like about classes and other basic stuff what are the things which i need to know so that i can understand the source code of some advance open source projects and be able to make one too. Like if i read the code of vlc or some other projects I can't understand many things moreover i am just a beginner have not worked on even multi file programs so please suggest which are the books and what are the basic projects from where i can start.

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  • Cruise Control.Net best practices

    - by Nasser Hajloo
    I'm going to implement a CI process with CC.NET so I'm looking for best practices for CC.net implementation. I use SVN as source control and JIRA as an issue tracker (if it's a useful tip). Any recommandation or article suggestion will be appreciated. Note: I read this article by Martin Fowler.

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  • [ASP.NET MVC] Ajax.BeginForm doesn't work asynchronously

    - by Tony
    Hi, I've read the article http://davidhayden.com/blog/dave/archive/2009/05/19/ASPNETMVCAjaxBeginForm.aspx and now I have small problem with that code: <%using (Ajax.BeginForm("ChangeData", new AjaxOptions { UpdateTargetId = "myLabel" })) { %> <input id="mbutton" type="submit" value="blabla" /> <%} %> <label id="myLabel"></label> then, in the MyBookController.cs is the code to be invoked asynchronous: public ActionResult ChangeData() { return Content("OK"); } but, it doesn't work asynchronously, the compiler doesn't go inside that method

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  • VBNet2008 Transfer DATAREADER rows to CrystalReport DataSet1.xsd

    - by lennie
    Hi Good Guys, I need your help. Please help me as I am a newbie using VB.NET. I have been asked to transfer DATAREADER rows into Crystal Report DATASET1.XSD Here are the coding Private Sub BtnTransfer() dim strsql as string = "Select OrderID, OrderDate from ORDERS" dim DS as new dataset1 '<---crysal report dataset1.xsd dim DR as SqlDataReader dim RW as DataRow = DS.Tables(0).NewRow sqlconn = new sqlconnection(ConnString) sqlcmd = new sqlCommand(strSql, sqlconn) sqlcmd.Connection.open() DR = sqlcmd.ExecuteReader(CommandBehaviour.CloseConnection) Do while DR.READ RW("OrderID") = DR("OrderID") RW("OrderDate") = DR(OrderDate") DS.Tables(0).Rows.ADD(RW) Loop End sub

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  • how can I run the apple Storekit in the simulator?

    - by software evolved
    Normally, this can't be done. I have written a class which wraps around the usual Storekit functionality and will allow an app to behave (while running on the simulator) as if the Storekit transaction had succeeded. I have written a blog post about the design decisions behind the code, which can be read here and includes a download link: http://code-evolution.blogspot.com/2010/05/evolved-code-example-1-simplestore-for.html Or you can just grab the sample project from this location: simplestoreevolved.googlecode.com/files/SimpleStoreEvolved.zip Enjoy T.

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  • Calling Save on a Configuration obj with a custom sectiongroup of type NameValueSectionHandler

    - by Allen
    I've got aConfiguration object that I can easily read and write settings from and call Save(ConfigurationSaveMode.Minimal, true) on and that typically works just fine. However, I now have a config file that has a custom sectionGroup defined of type System.Configuration.NameValueSectionHandler (I didn't write that part and I can't change it). Now when I call the Save method, it throws a TypeLoadException Message: Type System.Configuration.NameValueSectionHandler does not inherit from System.Configuration.ConfigurationSectionGroup. Callstack: at System.Configuration.TypeUtil.VerifyAssignableType (Type baseType, Type type, Boolean throwOnError) at System.Configuration.TypeUtil.GetConstructorWithReflectionPermission (Type type, Type baseType, Boolean throwOnError) at System.Configuration.MgmtConfigurationRecord.CreateSectionGroupFactory (FactoryRecord factoryRecord) at System.Configuration.MgmtConfigurationRecord.EnsureSectionGroupFactory (FactoryRecord factoryRecord) at System.Configuration.MgmtConfigurationRecord.GetSectionGroup (String configKey) at System.Configuration.ConfigurationSectionGroupCollection.Get (String name) at System.Configuration.ConfigurationSectionGroupCollection. <GetEnumerator>d__0.MoveNext() at System.Configuration.Configuration.ForceGroupsRecursive (ConfigurationSectionGroup group) at System.Configuration.Configuration.SaveAsImpl (String filename, ConfigurationSaveMode saveMode, Boolean forceSaveAll) at System.Configuration.Configuration.Save (ConfigurationSaveMode saveMode, Boolean forceSaveAll) at MyCompany.MyProduct.blah.blah.Save () in C:\\projects\\blah\\blah\\blah.cs:line blah For reference, the configuration goes like so <configuration> <configSections> ... normal sections here that work just fine, followed by ... <sectionGroup name="threadSettings" type="System.Configuration.NameValueSectionHandler"> <section name="T1" type="System.Configuration.DictionarySectionHandler"/> <section name="T2" type="System.Configuration.DictionarySectionHandler"/> <section name="T3" type="System.Configuration.DictionarySectionHandler"/> </sectionGroup> </configSections> <applicationSettings /> <threadSettings> <T1> <add key="key-here" value="value-here"/> </T1> ... T2 and T3 here as well, thats not interesting ... </threadSettings> </configuration> If I remove the actual sections and the definition for the custom section groups, I am able to read / write settings just fine and even call Save just fine. Obviously the custom section groups could be setup a little nicer but I can't fix that so I'm wondering: Is it possible to get the Configuration object to save if it has custom sectionGroups of the NameValueSectionHandler type

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  • Haars Cascade for Actionscript development

    - by Andre
    Hi guys, I have an object that I want to be able to recognize in AS3. There's a port of OpenCV for AS3 already, that works with Haars cascades, so now I need to create a cascade of my object. From what I've read, I'll have to create an XML of several images (positive and negative), but I can't find a program that'll do that for Mac OS X. Is there anything I can use that'll generate that XML on Mac OS X? Cheers, Andre

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  • What is the practical difference between transport and message reliability in WCF?

    - by mrlane
    I am looking at differences between using WPF in .NET or using Silverlight 4 for the GUI front end of an app that connects to WCF services. I have read that net.tcp binding in Silverlight 4 only supports transport level reliability. With a WPF desktop app we can use message level reliability. What is the actual difference? If transport level reliability ensures that all TCP packets get through, doesnt that also mean that all WCF SOAP messages will also get through?

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  • Creating dll from cpp files with nmake.

    - by Eugene Gavrin
    Hi. There is a problem: i need to compile the dll from all source *.cpp files in a particular folder with a help of nmake. For example, cpp files stored in the folder ".\src", and they must be compiled into one dll. Where i can read about nmake? Or some examples?

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  • SAS: add comment to lst ouput file

    - by Dan
    In SAS, How do I add comments to my .LST output file. Like adding a comment saying "This is the output for tbl_TestMacro:" right before doing a proc print? So that my output file will read: This is the output for tbl_TestMacro: Obs field1 field2 1 6 8 2 6 9 3 7 0 4 7 1 Instead of just: Obs field1 field2 1 6 8 2 6 9 3 7 0 4 7 1 Thanks, Dan

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  • libevent buffered events and half-closed sockets

    - by Vi
    It is simple to implement a port mapper using bufferevent_* functions of libevent. However, the documentation states that "This file descriptor is not allowed to be a pipe(2)". Will libevent work correctly if I shutdown the socket in one direction shutdown(socket, SHUT_WR);? I expect it to discard remaining data in the buffer and not write there anymore, but continue reading from socket and calling a read handler.

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  • How to use XmlPeek task?

    - by Nam Gi VU
    I've read in the MSDN MSBuild Task Reference about XmlPeek task at http://msdn.microsoft.com/en-us/library/ff598684(v=VS.100).aspx but I cannot use it in my MSBuild script. If you have used this before, please show me how!

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  • NHibernate Transactions Best Practices

    - by Ramiro
    I have been reading about Nhibernate for a while and have been trying to use it for a site I'm implementing. I read the article by Billy McCafferty on NHibernate best practices but I did not see any indication on where is the best place to handle transactions. I thought of putting that code in the Data Access Object (DAO) but then I'm not sure how to handle cases in which more than one DAO is used. What are the best places to put transaction code in your NHibernate Application?

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  • objective-c uncompress/inflate a NSData object which contains a gzipped string

    - by user141146
    Hi, I'm using objective-c (iPhone) to read a sqlite table that contains blob data. The blob data is actually a gzipped string. The blob data is read into memory as an NSData object I then use a method (gzipInflate) which I grabbed from here (http://www.cocoadev.com/index.pl?NSDataCategory) -- see method below. However, the gzipInflate method is returning nil. If I step through the gzipInflate method, I can see that the status returned near the bottom of the method is -3, which I assume is some type of error (Z_STREAM_END = 1 and Z_OK = 0, but I don't know precisely what a status of -3 is). Consequently, the function returns nil even though the input NSData is 841 bytes in length. Any thoughts on what I'm doing wrong? Is there something wrong with the method? Something wrong with how I'm using the method? Any thoughts on how to test this? Thanks for any help! - (NSData *)gzipInflate { // NSData *compressed_data = [self.description dataUsingEncoding: NSUTF16StringEncoding]; NSData *compressed_data = self.description; if ([compressed_data length] == 0) return compressed_data; unsigned full_length = [compressed_data length]; unsigned half_length = [compressed_data length] / 2; NSMutableData *decompressed = [NSMutableData dataWithLength: full_length + half_length]; BOOL done = NO; int status; z_stream strm; strm.next_in = (Bytef *)[compressed_data bytes]; strm.avail_in = [compressed_data length]; strm.total_out = 0; strm.zalloc = Z_NULL; strm.zfree = Z_NULL; if (inflateInit2(&strm, (15+32)) != Z_OK) return nil; while (!done) { // Make sure we have enough room and reset the lengths. if (strm.total_out >= [decompressed length]) [decompressed increaseLengthBy: half_length]; strm.next_out = [decompressed mutableBytes] + strm.total_out; strm.avail_out = [decompressed length] - strm.total_out; // Inflate another chunk. status = inflate (&strm, Z_SYNC_FLUSH); NSLog(@"zstreamend = %d", Z_STREAM_END); if (status == Z_STREAM_END) done = YES; else if (status != Z_OK) break; //status here actually is -3 } if (inflateEnd (&strm) != Z_OK) return nil; // Set real length. if (done) { [decompressed setLength: strm.total_out]; return [NSData dataWithData: decompressed]; } else return nil; }

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  • A Book about Productivity for programmers

    - by dole doug
    I just find this video about productivity for programmers by peepcode and I'm thinking to download and see it. Besides that, I have to tell you that I prefer to read a book and take notices about it, rather than seeing a video. So, my question is: can you recommend me a good book about productivity for programmers with tips, advices, best practice, et? ps: I'm new into this work field(because I'm still a student).

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  • How do I use Loki's small object allocator?

    - by Gregory
    I need to use Loki's small object allocator but I am very confused as to how it works. I've read the documentation and lots of forums but it doesnt make sense: some of them say to use the stl, others use custom allocators. I just need to be able to test its performance with allocating and deallocating objects of different sizes. Could someone please provide a small example of how to use it?

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  • Multiple NSOperationQueues?

    - by Infinity
    Hello! I would like to use NSOperations in my application to resolve threading problems. I have read some tutorials and now I know what I have to do, but I have a problem. There is a must to have the same NSOperationQueue in each class. What if I use a new NSOperationQueue in each class. There will be concurrency problems?

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  • moving to NoSql

    - by radi
    hi , i recently read this article nosql-vs-rdbms and i dont know too much about nosql and i didnt use it in my projects , so i have some questions : what is the main feature that nosql has over Rdbms ? if you think that it is best than rdbms : where and how i can learn about it (books - tutorials)? i want to be a DBA , what this career will be after moving to nosql ? thanks

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  • moving to NoSql

    - by radi
    hi , i recently read this article nosql-vs-rdbms and i dont know too much about nosql and i didnt use it in my projects , so i have some questions : what is the main feature that nosql has over Rdbms ? if you think that it is best than rdbms : where and how i can learn about it (books - tutorials)? i want to be a DBA , what this career will be after moving to nosql ? thanks

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  • How to do integration testing?

    - by StackUnderflow
    There is so much written about unit testing but I have hardly found any books/blogs about integration testing? Could you please suggest me something to read on this topic? What tests to write when doing integration testing? what makes a good integration test? etc etc Thanks

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  • Where do you use generators feature in your python code?

    - by systempuntoout
    I have studied generators feature and i think i got it but i would like to understand where i could apply it in my code. I have in mind the following example i read in "Python essential reference" book: # tail -f def tail(f): f.seek(0,2) while True: line = f.readline() if not line: time.sleep(0.1) continue yield line Do you have any other effective example where generators are the best tool for the job like tail -f? How often do you use generators feature and in which kind of functionality\part of program do you usually apply it?

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  • Security in programmming?

    - by yesraaj
    What is the best book to read about security issues that should be kept in mind while programming? What should a c++ programmer know about security? Is it worth buying any one of the following book If so which one should I get. Secure Coding In C & C++ Secure Programming Cookbook for C and C++ Writing Secure code

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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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