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• Subversion - Do I need to reintegrate if I don't merge from trunk

  - by user314584

  Hi, I have read quite a bit about the need to re-integrate when you merge from a branch back to the trunk in SVN (This article was really helpful http://blogs.open.collab.net/svn/2008/07/subversion-merg.html). The problem seems to come from the fact that people are regularly updating the branch from the trunk which means that the final merge back is reflective. In my use-case, we want to create a release branch which will live for as long as it takes to stabilise the branch and fix any bugs. To maintain stability we don't want to merge up from the trunk but we do want to regularly merge fixes down from the release branch so that trunk gets all the bug fixes for free. We also don't want to wait until the end of QA to merge back to trunk. We therefore want to: 1.) Create the branch 2.) Make regular changes to the branch (and trunk) 3.) Merge back to trunk regularly (daily perhaps) Since we will never merge up from trunk I don't think that we need to worry about the problems that re-intergrating is designed to fix. Can anyone see a problem with this approach? Cheers, Matt

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• Facebook connect PHP API - friends_get() returns empty array

  - by Soufiane Hassou

  Couple of hours ago I succeed to get friends_get() to return an array of friends, but, now I don't know if it is my fault or something is wrong in facebooks' end (API problems?). Anyway I used a code from their documentation: <?php require_once 'facebook-platform/php/facebook.php'; $appapikey = ''; //CHANGE THIS $appsecret = ''; //CHANGE THIS $facebook = new Facebook($appapikey, $appsecret); //$user_id = $facebook->require_login(); $fb_user=$facebook->get_loggedin_user(); //$fb_user = $facebook->user; $friends = $facebook->api_client->friends_get(); $friends = array_slice($friends, 0, 10); $i=0; foreach ($friends as $friend) { $personArray = $facebook->api_client->users_getInfo($friend,"name"); $person[$i]=$personArray[0]; $i++; } $i=0; foreach ($person as $f) { echo " ".$f['name']; //MORE DETAILS HERE IN STEP 2 echo "<br />"; $i++; } echo "<br />"; ?> The login is working great, but, I can't retrieve the list of friends and I test also with api_client->pages_isFan and it doesn't seem to work too (says not a fan while the user is).

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• WCF Security in a Windows Service

  - by Alphonso

  I have a WCF service which can run as Console App and a Windows Service. I have recently copied the console app up to a W2K3 server with the following security settings: <wsHttpBinding> <binding name="ServiceBinding_Security" transactionFlow="true" > <security mode="TransportWithMessageCredential" > <message clientCredentialType="UserName" /> </security> </binding> </wsHttpBinding> <serviceCredentials> <userNameAuthentication userNamePasswordValidationMode="Custom" customUserNamePasswordValidatorType="Common.CustomUserNameValidator, Common" /> </serviceCredentials> Security works fine with no problems. I have exactly the same code, but running in a windows service and I get the following error when I try to call any of the methods from a client: System.ServiceModel.Security.MessageSecurityException was unhandled Message="An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail." Source="mscorlib" StackTrace: Server stack trace: at System.ServiceModel.Channels.SecurityChannelFactory`1.SecurityRequestChannel.ProcessReply(Message reply, SecurityProtocolCorrelationState correlationState, TimeSpan timeout) ...... (lots of stacktrace info - not very useful) InnerException: System.ServiceModel.FaultException Message="An error occurred when verifying security for the message." The exception tells me nothing. I'm assuming that it has something to do with acces to system resources from the Windows Service. I've tried running it under the same account as the console app, but no luck. Does anyone have any ideas?

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• Raw FTP SSL with C#

  - by Chuck

  Hi, I'm trying to understand how SSL works. In my wish to make a small FTP client which supports SSL I've run into some problems: TcpClient FtpConnection = new TcpClient(FtpServer, FtpPort); NetworkStream FtpStream = FtpConnection.GetStream(); StreamReader FtpReader = new StreamReader(FtpStream); FtpWriter = new StreamWriter(IrcStream); send_cmd("AUTH SSL"); send_cmd is just a FtpWriter.WriteLine(text); FtpWriter.Flush(); function. My "problem" is this: First I need to make a (non-ssl) connection to the FTP, then tell it to do a ssl connection (AUTH SSL), and I would guess I then need to make a new connection - something like: TcpClient client = new TcpClient(FtpServer, FtpPort); SslStream sslStream = new SslStream(client.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null); try { sslStream.AuthenticateAsClient("foobar"); } catch (AuthenticationException e) { MessageBox.Show("Authentication failed - closing the connection."); client.Close(); return; } Taken from msdn. I keep dying on handshake failed due to unexpected packet format (which I've tried googling, but all say it's because the author has connected to a wrong port), which I take as: The connection is not ssl until AUTH SSL is send to it. So my question is, how would i go about making this a "hybrid" connection so I can make an SSL connection to the server? Any help is greatly appreciated!

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• How to create a rails habtm that deletes/destroys without error?

  - by Bradley

  I created a simple example as a sanity check and still can not seem to destroy an item on either side of a has_and_belongs_to_many relationship in rails. Whenever I try to delete an object from either table, I get the dreaded NameError / "uninitialized constant" error message. To demonstrate, I created a sample rails app with a Boy class and Dog class. I used the basic scaffold for each and created a linking table called boys_dogs. I then added a simple before_save routine to create a new 'dog' any time a boy was created and establish a relationship, just to get things setup easily. dog.rb class Dog < ActiveRecord::Base has_and_belongs_to_many :Boys end boy.rb class Boy < ActiveRecord::Base has_and_belongs_to_many :Dogs def before_save self.Dogs.build( :name => "Rover" ) end end schema.rb ActiveRecord::Schema.define(:version => 20100118034401) do create_table "boys", :force => true do |t| t.string "name" t.datetime "created_at" t.datetime "updated_at" end create_table "boys_dogs", :id => false, :force => true do |t| t.integer "boy_id" t.integer "dog_id" t.datetime "created_at" t.datetime "updated_at" end create_table "dogs", :force => true do |t| t.string "name" t.datetime "created_at" t.datetime "updated_at" end end I've seen lots of posts here and elsewhere about similar problems, but the solutions are normally using belongs_to and the plural/singular class names being confused. I don't think that is the case here, but I tried switching the habtm statement to use the singular name just to see if it helped (with no luck). I seem to be missing something simple here. The actual error message is: NameError in BoysController#destroy uninitialized constant Boy::Dogs The trace looks like: /Library/Ruby/Gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:105:in const_missing' (eval):3:indestroy_without_callbacks' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/callbacks.rb:337:in destroy_without_transactions' /Library/Ruby/Gems/1.8/gems/activerecord-2.3.4/lib/active_record/transactions.rb:229:insend' ... Thanks.

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• Boost.Python wrapping hierarchies avoiding diamond inheritance

  - by stbuton

  I'm having some trouble seeing what the best way to wrap a series of classes with Boost.Python while avoiding messy inheritance problems. Say I have the classes A, B, and C with the following structure: struct A { virtual void foo(); virtual void bar(); virtual void baz(); }; struct B : public A { virtual void quux(); }; struct C : public A { virtual void foobar(); }; I want to wrap all classes A, B, and C such that they are extendable from Python. The normal method for accomplishing this would be along the lines of: struct A_Wrapper : public A, boost::python::wrapper<A> { //dispatch logic for virtual functions }; Now for classes B and C which extend from A I would like to be able to inherit and share the wrapping implementation for A. So I'd like to be able to do something along the lines of: struct B_Wrapper : public B, public A_Wrapper, public boost::python::wrapper<B> { //dispatch logic specific for B }; struct C_Wrapper : public C, public A_Wrapper, public boost::python::wrapper<C> { //dispatch logic specific for C } However, it seems like that would introduce all manner of nastiness with the double inheritance of the boost wrapper base and the double inheritance of A in the B_Wrapper and C_Wrapper objects. Is there a common way that this instance is solved that I'm missing? thanks.

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• An implementation of Sharir's or Aurenhammer's deterministic algorithm for calculating the intersect

  - by RGrey

  The problem of finding the intersection/union of 'N' discs/circles on a flat plane was first proposed by M. I. Shamos in his 1978 thesis: Shamos, M. I. “Computational Geometry” Ph.D. thesis, Yale Univ., New Haven, CT 1978. Since then, in 1985, Micha Sharir presented an O(n log2n) time and O(n) space deterministic algorithm for the disc intersection/union problem (based on modified Voronoi diagrams): Sharir, M. Intersection and closest-pair problems for a set of planar discs. SIAM .J Comput. 14 (1985), pp. 448-468. In 1988, Franz Aurenhammer presented a more efficient O(n log n) time and O(n) space algorithm for circle intersection/union using power diagrams (generalizations of Voronoi diagrams): Aurenhammer, F. Improved algorithms for discs and balls using power diagrams. Journal of Algorithms 9 (1985), pp. 151-161. Earlier in 1983, Paul G. Spirakis also presented an O(n^2) time deterministic algorithm, and an O(n) probabilistic algorithm: Spirakis, P.G. Very Fast Algorithms for the Area of the Union of Many Circles. Rep. 98, Dept. Comput. Sci., Courant Institute, New York University, 1983. I've been searching for any implementations of the algorithms above, focusing on computational geometry packages, and I haven't found anything yet. As neither appear trivial to put into practice, it would be really neat if someone could point me in the right direction!

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• when does factory girl create objects in db?

  - by Pavel K.

  i am trying to simulate a session using factory girl/shoulda (it worked with fixtures but i am having problems with using factories). i have following factories (user login and email both have 'unique' validations): Factory.define :user do |u| u.login 'quentin' u.email '[email protected]' end Factory.define :session_user, :class => Session do |u| u.association :user, :factory => :user u.session_id 'session_user' end and here's the test class MessagesControllerTest < ActionController::TestCase context "normal user" do setup do @request.session[:user_id]=Factory(:user).id @request.session[:session_id]=Factory(:session_user).session_id end should "be able to access new message creation" do get :new assert_response :success end end end but when i run "rake test:functionals", i get this test result 1) Error: test: normal user should be able to access new message creation. (MessagesControllerTest): ActiveRecord::RecordInvalid: Validation failed: Account name already exists!, Email already exists! which means that record already exists in db when i am referring to it in test setup. is there something i don't understand here? does factory girl create all factories in db on startup? rails 2.3.5/shoulda/factory girl

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• Linking session state between servlets and EJBs?

  - by wilth

  Hello, I have servlets (in a web module) that access stateless EJB beans (in an EJB module). The EJB module is built using SEAM. Users can have different roles and the EJB services check this using Seam's Identity. I also use a customized Authenticator (although this might not be relevant here). I noticed problems with this approach and I'm suspecting that the session context in the servlets is not "linked" with the session context in the EJB beans. What I think happens is something like: User Joe access servlet A and is assigned Session W1. Servlet A calls a login function on an EJB, using the EJB session E1. Later, user Mary accesses servlet A and is assigned Session W2. When calling the EJBs, however, the EJB session E1 is used and therefore Mary is authenticated as Joe. What also happens is that when Joe is calling the servlet twice in rapid succession, the same session W1 is used, but two different sessions E1 and E2 in the business layer, causing errors. I might be wrong in my suspicion, but maybe I'm actually expecting these "sessions" to be linked together while they in fact are not. If this is true, is there any way of achieving this? I could - of course - use stateful beans and save the authentication information in the beans, but this would break the "Identity" concept of Seam (and in general, it would be preferable to be able to use the Session context in my EJB beans). Any help and pointers are very welcome - thanks! Technology: EJB3, Seam 2.1.2. The servlets are actually the server-side of a GWT app, although I don't think this matters much. I'm using JBoss 5.

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• Can SOTI's MobiControl software interfere with an ASP.Net web service?

  - by MusiGenesis

  We have a set of WinMo (5.0) devices running a .NET CF application that talks to an ASP.Net web service running on a server. The devices connect to the network either via ActiveSync through a networked PC or directly to the network via an Ethernet dongle. In our development environment, the communication between devices and web service is 100% reliable. In our production environment, the communications are failing erratically and unpredictably. Sometimes calls to the web service (even to a simple test call that just returns a boolean) begin failing every time on a particular device, with the error message "Could not establish connection to network." This is usually fixed by flip-flopping the selected combo box values on the SETTINGS | NETWORKS screen. Sometimes calls on a particular device begin failing with a generic "WebException" message. The fix for this problem (so far) is either to reset the device (i.e. reinstall the OS) or else it just can't be fixed on some devices. To the best of our knowledge, everything about the DEV and PROD systems are the same (same server and device specs). The most obvious difference to us is that the PROD devices are all controlled by SOTI's MobiControl (which is server-side software that communicates with a SOTI client application installed on each device), whereas our DEV environment does not have SOTI installed anywhere (obviously we should have it there as well - long story). Does anybody have any experience with SOTI MobiControl and/or know of any documented problems where SOTI interferes with other communication mechanisms on a device?

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• Unable to connect to UNC share with WindowsIdentity.Impersonate, but works fine using LogonUser

  - by Rob

  Hopefully I'm not missing something obvious here, but I have a class that needs to create some directories on a UNC share and then move files to the new directory. When we connect using LogonUser things work fine with no errors, but when we try and use the user indicated by Integrated Windows authentication we run into problems. Here's some working and non-working code to give you an idea what is going on. The following works and logs the requested information: [DllImport("advapi32.dll", SetLastError = true)] private static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, out IntPtr phToken); [DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool CloseHandle(IntPtr handle); IntPtr token; WindowsIdentity wi; if (LogonUser("user", "network", "password", 8, // LOGON32_LOGON_NETWORK_CLEARTEXT 0, // LOGON32_PROVIDER_DEFAULT out token)) { wi = new WindowsIdentity(token); WindowsImpersonationContext wic = wi.Impersonate(); Logging.LogMessage(System.Security.Principal.WindowsIdentity.GetCurrent().Name); Logging.LogMessage(path); DirectoryInfo info = new DirectoryInfo(path); Logging.LogMessage(info.Exists.ToString()); Logging.LogMessage(info.Name); Logging.LogMessage("LastAccessTime:" + info.LastAccessTime.ToString()); Logging.LogMessage("LastWriteTime:" + info.LastWriteTime.ToString()); wic.Undo(); CloseHandle(token); } The following fails and gives an error message indicating the network name is not available, but the correct user name is indicated by GetCurrent().Name: WindowsIdentity identity = (WindowsIdentity)HttpContext.Current.User.Identity; using (identity.Impersonate()) { Logging.LogMessage(System.Security.Principal.WindowsIdentity.GetCurrent().Name); Logging.LogMessage(path); DirectoryInfo info = new DirectoryInfo(path); Logging.LogMessage(info.Exists.ToString()); Logging.LogMessage(info.Name); Logging.LogMessage("LastAccessTime:" + info.LastAccessTime.ToString()); Logging.LogMessage("LastWriteTime:" + info.LastWriteTime.ToString()); }

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• Problem with authentication from different domains using Django sessions.

  - by Greg

  Hi all, I am developing a bookmarklet which essentially adds a toolbar to a web page user is currently looking at. To use it, user needs to be logged in. To login user clicks on 'Singin' which displays a standard form containing Username, Password etc fields. When user successfully logs in they may chose to navigate to a different web-site. When on another page, they (a) re-load the bookmarklet (b) their session is retrieved from the server (c) user doesn't need to login again. Pretty standard I've would have thought. Using Django sessions and JQuery. I'm having troubles implementing the above usecase. Here are some problems I've encountered: Cross domain POST AJAX requests are disallowed. That was solved with JSONp. I doubt it is a very secure approach but for now it works. My server returns the session id in a cookie, however when the user navigates to a different page I don't really know how to retrieve that session id to send back to my server. Can I even read third party cookies from my JavaScript? I'm looking for some guidelines on implementing the above usecase. Ideally I don't want to redirect user to another page for them to sign in. Any suggestion would be greatly appreciated. Thanks.

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• Question about functional OOP style in JavaScript

  - by valums

  I prefer to use functional OOP style for my code (similar to the module pattern) because it helps me to avoid the "new" keyword and all problems with the scope of "this" keyword in callbacks. But I've run into a few minor issues with it. I would like to use the following code to create a class. namespace.myClass = function(){ var self = {}, somePrivateVar1; // initialization code that would call // private or public methods privateMethod(); self.publicMethod(); // sorry, error here function privateMethod(){} self.publicMethod = function(){}; return self; } The problem is that I can't call public methods from my initialization code, as these functions are not defined yet. The obvious solution would be to create an init method, and call it before "return self" line. But maybe you know a more elegant solution? Also, how do you usually handle inheritance with this pattern? I use the following code, butI would like to hear your ideas and suggestions. namespace.myClass2 = function(){ var self = namespace.parentClass(), somePrivateVar1; var superMethod = self.someMethod; self.someMethod = function(){ // example shows how to overwrite parent methods superMethod(); }; return self; } Edit. For those who asked what are the reasons for choosing this style of OOP, you can look into following questions: http://stackoverflow.com/questions/1557386/prototypal-vs-functional-oop-in-javascript http://stackoverflow.com/questions/383402/is-javascript-s-new-keyword-considered-harmful

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• Why is Microsoft under-supporting or under-developping VBNET?

  - by Will Marcouiller

  I ran into a situation where the lack of some features has become somewhat frustrating while developping in VB.NET 2.0. Since my first day of programming, I've always been a C programmer, and still am. Naturally, I chose C# as my favorite .NET language. Recently, a customer of mine has obliged that all of his development projects which disregard SharePoint development have to be written in VB.NET 2.0, that is to avoid conflictual systems to come into some problems. That is a legitimate choice of his which I approve somehow, since he's running some old central systems and is slowly migrating toward latest technologies. As for me, I would have prefered to go with C#, but then, never having done much VB in my life, I see it as an opportunity to learn somethings new, how to handle this and that in VBNET, etc. Except that the syntax is really too verbose for me, which is a pain! I got used to it and that is fine. However, I recently wanted to use the InternalsVisibleToAttribute which I discovered lastly here on SO. But then, in addition to not being able to have lambda expression that returns no value, which I discovered months ago, today I learn that I can't use the attribute in VBNET! Here is what I have read in an article: [...] Sorry VB.Net developers, Microsoft is again shunning you guys and this attribute is NOT available to you.... :( And here is the link: InternalsVisibleTo: Testing internal methods in .Net 2.0 I have heard from Anders Hejlsberg mouth while watching a Webcast from his presentation of .NET 4.0 Framework that the VBNET team was working or has worked in collaboration with the C# team (Eric Lippert and others) in order to bring VBNET to offer the same features as C# offers. But then, I say to myself that the VBNET team has a huge step forward to make, if already in .NET 2.0, some of the most important features lacked! So my question is this: Why is Microsoft under-supporting or under-developping VBNET? Will VBNET ever be lacking the C# features?

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• Should the entity framework + self tracking entities be saving me time

  - by sipwiz

  I've been using the entity framework in combination with the self tracking entity code generation templates for my latest silverlight to WCF application. It's the first time I've used the entity framework in a real project and my hope was that I would save myself a lot of time and effort by being able to automatically update the whole data access layer of my project when my database schema changed. Happily I've found that to be the case, updating my database schema by adding a new table, changing column names, adding new columns etc. etc. can be propagated to my business object classes by using the update from database option on the entity framework model. Where I'm hurting is the CRUD operations within my WCF service in response to actions on my Silverlight client. I use the same self tracking entity framework business objects in my Silverlight app but I find I'm continually having to fight against problems such as foreign key associations not being handled correctly when updating an object or the change tracker getting confused about the state of an object at the Silverlight end and the data access operation within the WCF layer throwing a wobbly. It's got to a point where I have now spent more time dealing with this quirks than I have on my previous project where I used Linq-to-SQL as the starting point for rolling my own business objects. Is it just me being hopeless or is the self tracking entities approach something that should be avoided until it's more mature?

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• Should programmers do Pro Bono work? where are the code public defenders?

  - by Tj Kellie

  How many projects are people doing based on the Bro Bono publico ideals versus working for the highest wage or potential for a cash-in-buy-out payday? For years lawyers have been called out for excessive gathering of wealth from high bill rates and huge settlement deals, hiring out their knowledge and skills to the highest bidders. People call for them to do more for free, use the laws and their time to defend or further some cause thats in the public's best interest. Is professional software development that different? So many bright people and so much knowledge of complex systems. Do you think that there is enough of a "Pro Bono" movement to solve the social and public problems in the industry right now? If so what are the examples to point to? OLPC? NOTE: Saying that open source software is the same as pro bono misses the point completely. I was looking for specific projects with a social context, not just group-sourcing for free software. Just because your not making anyone pay for your software does not mean its doing anyone any good. I'm not calling out manual enforcement of pro bono work for programmers, really just want some objective opinions and concrete examples of social-minded software/tech development projects like the One Laptop Per Child project. I'm sure open source would be a natural tie-in for some.

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• Forking in PHP on Windows

  - by Doug Kavendek

  We are running PHP on a Windows server (a source of many problems indeed, but migrating is not an option currently). There are a few points where a user-initiated action will need to kick off a few things that take a while and about which the user doesn't need to know if they succeed or fail, such as sending off an email or making sure some third-party accounts are updated. If I could just fork with pcntl_fork(), this would be very simple, but the PCNTL functions are not available in Windows. It seems the closest I can get is to do something of this nature: exec( 'php-cgi.exe somescript.php' ); However, this would be far more complicated. The actions I need to kick off rely on a lot of context that already will exist in the running process; to use the above example, I'd need to figure out the essential data and supply it to the new script in some way. If I could fork, it'd just be a matter of letting the parent process return early, leaving the child to work on a few more things. I've found a few people talking about their own work in getting various PCNTL functions compiled on Windows, but none seemed to have anything available (broken links, etc). Despite this question having practically the same name as mine, it seems the problem was more execution timeout than needing to fork. So, is my best option to just refactor a bit to deal with calling php-cgi, or are there other options? Edit: It seems exec() won't work for this, at least not without me figuring some other aspect of it, as it waits until the call returns. I figured I could use START, sort of like exec( 'start php-cgi.exe somescript.php' );, but it still waits until the other script finishes.

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• Simulating pass by reference for an array reference (i.e. a reference to a reference) in Java

  - by Leif Andersen

  I was wondering, in java, is it possible to in anyway, simulate pass by reference for an array? Yes, I know the language doesn't support it, but is there anyway I can do it. Say, for example, I want to create a method that reverses the order of all the elements in an array. (I know that this code snippet isn't the best example, as there is a better algorithms to do this, but this is a good example of the type of thing I want to do for more complex problems). Currently, I need to make a class like this: public static void reverse(Object[] arr) { Object[] tmpArr = new Object[arr.length]; count = arr.length - 1; for(Object i : arr) tmpArr[count--] = i; // I would like to do arr = tmpArr, but that will only make the shallow // reference tmpArr, I would like to actually change the pointer they passed in // Not just the values in the array, so I have to do this: count = arr.length - 1; for(Object i : tmpArr) arr[count--] = i; return; } Yes, I know that I could just swap the values until I get to the middle, and it would be much more efficient, but for other, more complex purposes, is there anyway that I can manipulate the actual pointer? Again, thank you.

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• Double Free inside of a destructor upon adding to a vector

  - by Shawn B

  Hey, I am working on a drum machine, and am having problems with vectors. Each Sequence has a list of samples, and the samples are ordered in a vector. However, when a sample is push_back on the vector, the sample's destructor is called, and results in a double free error. Here is the Sample creation code: class XSample { public: Uint8 Repeat; Uint8 PlayCount; Uint16 Beats; Uint16 *Beat; Uint16 BeatsPerMinute; XSample(Uint16 NewBeats,Uint16 NewBPM,Uint8 NewRepeat); ~XSample(); void GenerateSample(); void PlaySample(); }; XSample::XSample(Uint16 NewBeats,Uint16 NewBPM,Uint8 NewRepeat) { Beats = NewBeats; BeatsPerMinute = NewBPM; Repeat = NewRepeat-1; PlayCount = 0; printf("XSample Construction\n"); Beat = new Uint16[Beats]; } XSample::~XSample() { printf("XSample Destruction\n"); delete [] Beat; } And the 'Dynamo' code that creates each sample in the vector: class XDynamo { public: std::vector<XSample> Samples; void CreateSample(Uint16 NewBeats,Uint16 NewBPM,Uint8 NewRepeat); }; void XDynamo::CreateSample(Uint16 NewBeats,Uint16 NewBPM,Uint8 NewRepeat) { Samples.push_back(XSample(NewBeats,NewBPM,NewRepeat)); } Here is main(): int main() { XDynamo Dynamo; Dynamo.CreateSample(4,120,2); Dynamo.CreateSample(8,240,1); return 0; } And this is what happens when the program is run: Starting program: /home/shawn/dynamo2/dynamo [Thread debugging using libthread_db enabled] XSample Construction XSample Destruction XSample Construction XSample Destruction *** glibc detected *** /home/shawn/dynamo2/dynamo: double free or corruption (fasttop): 0x0804d008 *** However, when the delete [] is removed from the destructor, the program runs perfectly. What is causing this? Any help is greatly appreciated.

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• SpeechSynthesizer Exception - Please Help

  - by Chris

  Hi. I have the following code: private List<VoiceInfo> GetInstalledVoices(SpeechSynthesizer synthesizer) { CultureInfo currentCulture = CultureInfo.CurrentCulture; var listOfVoiceInfo = from voice in synthesizer.GetInstalledVoices(currentCulture) select voice.VoiceInfo; return listOfVoiceInfo.ToList<VoiceInfo>(); } I then call the code from the following code snippet: var synthesizer = new SpeechSynthesizer(); var installedVoices = GetInstalledVoices(synthesizer); VoiceInfo voice = null; if (installedVoices != null && installedVoices.Count > 0) { voice = installedVoices.FirstOrDefault(); } if (voice != null) { synthesizer.SelectVoice(voice.Name); } The line of code that selects the voice throws the following exception: "Cannot set voice. No matching voice is installed or the voice was disabled." This is being done from within an ASP.NET web application - running on Windows Server 2003 R2. When I run this from within Visual Studio 2008 - everything works fine. I created a simple Console app to perform the same action - then ran it from the Windows Server 2003 machine - and it worked fine. I even modified the code in the Console app to loop through each of the installed voices and select the voice. No problems. However, when doing the same from within the web application, I get the same error. I am beating my head against a wall on this one. ANY help on this would be greatly appreciated. Thanks. Chris

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• Enterprise Eclipse Provisioning - Or - How to share your standard Eclipse setup with other developer

  - by nikhil

  We use Eclipse as the IDE for developing all sorts of Java/J2EE applications in our 150 people odd IT department. One of the common problems we have been seeing is that developers download and install different versions of Eclipse and plugins based on their personal likes and dislikes. We have been trying to bring some consistency to this and have standardized on the version and the plugins that developers should be using. So the problem now is how do we distribute this installation to the team. We have zipped the directories and shared it through a shared drive. But I am looking for a better solution using some kind of provisioning tool for Eclipse using which people can install the IDE or get updates. Has anyone faced this problem? What are your solutions to this? How do you ensure a standard Eclipse environment across developers? I found Yoxos as a potential solution to this. Does anyone have any experience with it? Can p2 be used to do this?

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• ASP.net AppendHeader not working in ASP MVC

  - by Chao

  I'm having problems getting AppendHeader to work properly if I am also using an authorize filter. I'm using an actionfilter for my AJAX actions that applies Expires, Last-Modified, Cache-Control and Pragma (though while testing I have tried including it in the action method itself with no change in results). If I don't have an authorize filter the headers work fine. Once I add the filter the headers I tried to add get stripped. The headers I want to add Response.AppendHeader("Expires", "Sun, 19 Nov 1978 05:00:00 GMT"); Response.AppendHeader("Last-Modified", String.Format("{0:r}", DateTime.Now)); Response.AppendHeader("Cache-Control", "no-store, no-cache, must-revalidate"); Response.AppendHeader("Cache-Control", "post-check=0, pre-check=0"); Response.AppendHeader("Pragma", "no-cache"); An example of the headers from a correct page: Server ASP.NET Development Server/9.0.0.0 Date Mon, 14 Jun 2010 17:22:24 GMT X-AspNet-Version 2.0.50727 X-AspNetMvc-Version 2.0 Pragma no-cache Expires Sun, 19 Nov 1978 05:00:00 GMT Last-Modified Mon, 14 Jun 2010 18:22:24 GMT Cache-Control no-store, no-cache, must-revalidate, post-check=0, pre-check=0 Content-Type text/html; charset=utf-8 Content-Length 352 Connection Close And from an incorrect page: Server ASP.NET Development Server/9.0.0.0 Date Mon, 14 Jun 2010 17:27:34 GMT X-AspNet-Version 2.0.50727 X-AspNetMvc-Version 2.0 Pragma no-cache, no-cache Cache-Control private, s-maxage=0 Content-Type text/html; charset=utf-8 Content-Length 4937 Connection Close

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• video streaming over http in blackberry

  - by ysnky

  hi all, while i was searching video player over http, i found the article which is located at this url; http://www.blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/1089414/Stream ing_media_-_Start_to_finish.html?nodeid=2456737&ve rnum=0 i can run by adding ";deviceside=true" at the end of url. it works fine in the jde4.5 simulator. it gets 3gp videos from my local server. i tested with 580kb files and works fine. but when i get the same file from my server (not local, real server) i have problems with big files (e.g 580 kb). it plays 180kb files (but sometimes it does not play this file either) but not plays 580kb file. and also i deployed my application to my 9000 device it sometimes plays small file (180kb) but never plays big file (580kb). why it plays if it is on my local file, not play in real world? i ve stucked for days. hope you help me. and also the code at the url given below is not work, the only code i ve found is the above. blackberry.com/knowledgecenterpublic/livelink.exe/fetch/2000/348583/800332/1089414/How_To _-_Play_video_within_a_BlackBerry_smartphone_appli cation.html?nodeid=1383173&vernum=0 btw, there is no method such as resize(long param) of CircularByteBuffer class. so i comment relavent line (buffer.resize(buffer.getSize() + (buffer.getSize() * percent / 100)); as shown below. public void increaseBufferCapacity(int percent) { if(percent < 0){ log(0, "FAILED! SP.setBufferCapacity() - " + percent); throw new IllegalArgumentException("Increase factor must be positive.."); } synchronized(readLock){ synchronized(connectionLock){ synchronized(userSeekLock){ synchronized(mediaIStream){ log(0, "SP.setBufferCapacity() - " + percent); //buffer.resize(buffer.getSize() + (buffer.getSize() * percent / 100)); this.bufferCapacity = buffer.getSize(); } } } } } thanks in advance.

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• Perl: Exporting variables in a subclass

  - by Jonathan

  I have a base class like this: package MyClass; use vars qw/$ME list of vars/; use Exporter; @ISA = qw/Exporter/; @EXPORT_OK = qw/ many variables & functions/; %EXPORT_TAGS = (all => \@EXPORT_OK ); sub my_method { } sub other_methods etc { } --- more code--- I want to subclass MyClass, but only for one method. package MySubclass; use MyClass; use vars qw/@ISA/; @ISA = 'MyClass'; sub my_method { --- new method } And I want to call this MySubclass like I would the original MyClass, and still have access to all of the variables and functions from exporter. However I am having problems getting the Exporter variables from the original class, MyClass, to export correctly. Do I need to run exporter again inside the subclass? That seems redundant and unclear. Example file: #!/usr/bin/perl use MySubclass /$ME/; -- rest of code But I get compile errors when I try to import the $ME variable. Any suggestions?

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• Binding a DropDownList inside a DetailsView

  - by annelie

  Hello, I'm having problems trying to populate a dropdownlist from the database. When I'm trying to set the datasource I can't find the dropdown control, it's in a DetailsView so I think it might have something to do with it only being created when it's in edit mode. It still says it's in current mode when I'm editing though, so not sure what's going on there. Here's the code from the aspx file: <asp:DetailsView id="DetailsView1" runat="server" AutoGenerateRows="false" DataSourceID="myMySqlDataSrc" DataKeyNames="id" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" AutoGenerateInsertButton="False" > <Fields> <snip> <asp:TemplateField HeaderText="Region"> <ItemTemplate><%# Eval("region_name") %></ItemTemplate> <EditItemTemplate> <asp:DropDownList ID="RegionDropdownList" runat="server" SelectedValue='<%# Bind("region_id")%>'> </asp:DropDownList> </EditItemTemplate> </asp:TemplateField> </Fields> </asp:DetailsView> And this is from the code behind: ArrayList regionsList = BPBusiness.getRegions(); if (DetailsView1.CurrentMode == DetailsViewMode.Edit) { DropDownList ddlRegions = (DropDownList)DetailsView1.FindControl("RegionDropdownList"); if (ddlRegions != null) { ddlRegions.DataSource = regionsList; ddlRegions.DataBind(); } } It's .net 2.0 if that helps. Thanks, Annelie

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