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• C# Unit Testing - Generating Mock DataContexts / LINQ -> SQL classes

  - by gav

  Hi All, I am loving the new world that is C#, I've come to a point with my toy programs where I want to start writing some unit tests. My code currently uses a database via a DatabaseDataContext object (*.dbml file), what's the best way to create a mock for this object? Given how easy it is to generate the database LINQ - SQL code and how common a request this must be I'm hoping that VS2010 has built in functionality to help with testing. If I'm way off and this must be done manually could you please enlighten me as to your preferred approach? Many Thanks, Gavin

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• How do I determine if Android can handle PDF

  - by jasonshah

  Hi all, I know Android cannot handle PDFs natively. However, the Nexus One (and possibly other phones) come pre-installed with QuickOffice Viewer. How would I determine whether the user has a PDF viewer installed? Currently, the code to start the PDF download looks pretty simple: Intent intent = new Intent(Intent.ACTION_VIEW); intent.setData(Uri.parse(url)); startActivity(intent); After download, the user clicks on the downloaded file to invoke the viewer. However, if there is no PDF viewer, Android reports "Cannot download. The content is not supported on the phone." I want to determine if the user will get this message, and if so, direct them to PDF apps in the Android Market. Thanks!

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• Facebook Card Game? Which architecture?

  - by Ben

  I am developing a Facebook Card Game for my thesis and i am wondering which architecture fits best? I am going to develop the game using Silverlight + ASP.NET. On the one side the game should contain player vs. player card games. On the other there will be also a lot of contant similar to Mafia Wars(or any other game like that) where you just interact with the server (incl. database) I read a lot about ASP.NET MVC, Silverlight MVVM and that stuff. But what fits best for a game like that? Also i am not sure if i should go with Silverlight 4 already? I don't want to start the wrong way. I really appreciate your help.

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• PHP/codeigniter - use of exit()

  - by Patrick

  I have a few pages that require login, so all controllers that link to these pages start with $this->checkSession(); //...rest of the code CheckSession should verify the session is still live, otherwise display a message and stop the execution of the rest of the code in the controller: function checkSession() { if (!$this->session->userdata('is_logged_in')) { //the session has expired! $data['main'] = 'confirmation_message'; $data['title'] = "Session expired"; $this->load->vars($data); $this->load->view('template'); exit(); } } . I was expecting these instructions to happen in sequence, but I only get a blank page. How can I make sure exit() gets executed only after all views are loaded?

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• Displaying name instead of ID PHP MySQL

  - by Derek

  Hi, I need something simple; I have page where a user clicks an author to see the books associated with that author. On my page displaying the list of books for the author, I want a simple HTML title saying: 'The books for: AUTHORNAME' I can get the page to display author ID but not the name. When the user clicks the link in the previous page of the author, it looks likes this: <a href="viewauthorbooks.php?author_id=<?php echo $row['author_id']?>"><?php echo $row['authorname']?></a> And then on the 'viewauthorbooks.php?author_id=23' I have declared this at the start: $author_id = $_GET['author_id']; $authorname = $_GET['authorname']; And finally, 'The books for: AUTHORNAME, where it says AUTHORNAME, I have this: echo $authorname (With PHP tags, buts its not letting me put them in!) And this doesnt show anything, however if I change it to author_id, it displays the correct author ID that has been clicked, but its not exactly user friendly!! Can anyone help me out!

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• How do detect that transaction has already been started?

  - by xelurg

  I am using Zend_Db to insert some data inside a transaction. My function starts a transaction and then calls another method that also attempts to start a transaction and of course fails(I am using MySQL5). So, the question is - how do I detect that transaction has already been started? Here is a sample bit of code: try { Zend_Registry::get('database')->beginTransaction(); $totals = self::calculateTotals($Cart); $PaymentInstrument = new PaymentInstrument; $PaymentInstrument->create(); $PaymentInstrument->validate(); $PaymentInstrument->save(); Zend_Registry::get('database')->commit(); return true; } catch(Zend_Exception $e) { Bootstrap::$Log->err($e->getMessage()); Zend_Registry::get('database')->rollBack(); return false; } Inside PaymentInstrument::create there is another beginTransaction statement that produces the exception that says that transaction has already been started.

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• Reusing a vector in C++

  - by Bobby

  I have a vector declared as a global variable that I need to be able to reuse. For example, I am reading multiple files of data, parsing the data to create objects that are then stored in a vector. vector<Object> objVector(100); void main() { while(THERE_ARE_MORE_FILES_TO_READ) { // Pseudocode ReadFile(); ParseFileIntoVector(); ProcessObjectsInVector(); /* Here I want to 'reset' the vector to 100 empty objects again */ } } Can I reset the vector to be "vector objVector(100)" since it was initially allocated on the stack? If I do "objVector.clear()", it removes all 100 objects and I would have a vector with a size of 0. I need it to be a size of 100 at the start of every loop.

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• Framework vs. Micro-Architecture, which is mine

  - by droboZ

  I'm in the process of choosing a framework for my flex development, and one of the questions that was asked about a framework was "is this a framework or a micro-architecture"? Can someone clarify what's the difference? What exactly is a framework, and when can we start calling what we have a framework? I work with FlexBuilder3 (now called FlashBuilder4) and have a lot of standard things that I do for almost all projects, and components that I created for easy re-use. Some are very very small, but the benefit of a 1-liner has been immense for me instead of repeating the code over and over. So in the framework/micro-architecture scheme, can I say that these are my internal in-house framework or are they part of a micro-architecture? Trying to understand this topic better.

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• How to initiate an uninstall of a ClickOnce app, from within the app?

  - by dwolvin

  Can I reliably initiate the un-installation of a ClickOnce app, from within the app? In other words, I want to give the user a big "Uninstall Me Now" button on one of the forms. When a user clicks the button, I want to start the windows uninstall process for this app, and perhaps close the app. Reason: We are dead-ending a ClickOnce app and want to make it as easy to remove as it was to install. We don't want to send them down the path to "Add or Remove Programs" and risk them getting lost or distracted. Can this be done reliably?

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• Passenger problem: "no such file to load" -- /config/environment

  - by Mason Jones

  I've been researching this one and found references to similar problems here and there, but none of them has led to a solution yet. I've installed passenger (2.2.11) and nginx (0.7.64) and when I start things up and hit a Rails URL, I get an error page informing me of a load error: no such file to load -- /path/to/app/config/environment From what I've found online this appears to be some sort of a user/permissions error, but I've tried all the logical fixes: I've made sure that /config/environment.rb is not owned by root, but by a webapp user. I've tried setting passenger_default_user, I've tried setting passenger_user_switching off. I've even tried setting the nginx user, though that shouldn't matter much. I've gotten some differing results, but nothing's actually worked. I'm hoping someone may have the magical combination of settings and permissions for this. I may try backing down to an earlier version of Passenger, because I've never had this issue before; it's been a little while since I set up Passenger though. Thanks for any suggestions.

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• Can C++ memory leaks negatively affect CPU usage?

  - by Dan

  Hi all, I have a C++ program that has a pretty terrible memory leak, about 4MB / second. I know where it's coming from and can fix it, but that's not my main problem. My program is taking up a very large amount of CPU usage and it isn't running as fast as I want it to. I have two different threads in the program. One by itself takes ~50% CPU, which is fine, and the other by itself takes ~15% CPU, which is fine. Together however CPU usage is 100% and the program cannot run as fast as it needs to. Can a memory leak by itself cause a problem like this? I know the program will eventually crash due to the leaked memory, but does a memory leak immediately lead to a slower program? By immediately I mean the program is too slow at the very start, not just when the memory footprint is huge. Thanks!

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• Why does decorating a class break the descriptor protocol, thus preventing staticmethod objects from behaving as expected?

  - by Robru

  I need a little bit of help understanding the subtleties of the descriptor protocol in Python, as it relates specifically to the behavior of staticmethod objects. I'll start with a trivial example, and then iteratively expand it, examining it's behavior at each step: class Stub: @staticmethod def do_things(): """Call this like Stub.do_things(), with no arguments or instance.""" print "Doing things!" At this point, this behaves as expected, but what's going on here is a bit subtle: When you call Stub.do_things(), you are not invoking do_things directly. Instead, Stub.do_things refers to a staticmethod instance, which has wrapped the function we want up inside it's own descriptor protocol such that you are actually invoking staticmethod.__get__, which first returns the function that we want, and then gets called afterwards. >>> Stub <class __main__.Stub at 0x...> >>> Stub.do_things <function do_things at 0x...> >>> Stub.__dict__['do_things'] <staticmethod object at 0x...> >>> Stub.do_things() Doing things! So far so good. Next, I need to wrap the class in a decorator that will be used to customize class instantiation -- the decorator will determine whether to allow new instantiations or provide cached instances: def deco(cls): def factory(*args, **kwargs): # pretend there is some logic here determining # whether to make a new instance or not return cls(*args, **kwargs) return factory @deco class Stub: @staticmethod def do_things(): """Call this like Stub.do_things(), with no arguments or instance.""" print "Doing things!" Now, naturally this part as-is would be expected to break staticmethods, because the class is now hidden behind it's decorator, ie, Stub not a class at all, but an instance of factory that is able to produce instances of Stub when you call it. Indeed: >>> Stub <function factory at 0x...> >>> Stub.do_things Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'function' object has no attribute 'do_things' >>> Stub() <__main__.Stub instance at 0x...> >>> Stub().do_things <function do_things at 0x...> >>> Stub().do_things() Doing things! So far I understand what's happening here. My goal is to restore the ability for staticmethods to function as you would expect them to, even though the class is wrapped. As luck would have it, the Python stdlib includes something called functools, which provides some tools just for this purpose, ie, making functions behave more like other functions that they wrap. So I change my decorator to look like this: def deco(cls): @functools.wraps(cls) def factory(*args, **kwargs): # pretend there is some logic here determining # whether to make a new instance or not return cls(*args, **kwargs) return factory Now, things start to get interesting: >>> Stub <function Stub at 0x...> >>> Stub.do_things <staticmethod object at 0x...> >>> Stub.do_things() Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: 'staticmethod' object is not callable >>> Stub() <__main__.Stub instance at 0x...> >>> Stub().do_things <function do_things at 0x...> >>> Stub().do_things() Doing things! Wait.... what? functools copies the staticmethod over to the wrapping function, but it's not callable? Why not? What did I miss here? I was playing around with this for a bit and I actually came up with my own reimplementation of staticmethod that allows it to function in this situation, but I don't really understand why it was necessary or if this is even the best solution to this problem. Here's the complete example: class staticmethod(object): """Make @staticmethods play nice with decorated classes.""" def __init__(self, func): self.func = func def __call__(self, *args, **kwargs): """Provide the expected behavior inside decorated classes.""" return self.func(*args, **kwargs) def __get__(self, obj, objtype=None): """Re-implement the standard behavior for undecorated classes.""" return self.func def deco(cls): @functools.wraps(cls) def factory(*args, **kwargs): # pretend there is some logic here determining # whether to make a new instance or not return cls(*args, **kwargs) return factory @deco class Stub: @staticmethod def do_things(): """Call this like Stub.do_things(), with no arguments or instance.""" print "Doing things!" Indeed it works exactly as expected: >>> Stub <function Stub at 0x...> >>> Stub.do_things <__main__.staticmethod object at 0x...> >>> Stub.do_things() Doing things! >>> Stub() <__main__.Stub instance at 0x...> >>> Stub().do_things <function do_things at 0x...> >>> Stub().do_things() Doing things! What approach would you take to make a staticmethod behave as expected inside a decorated class? Is this the best way? Why doesn't the builtin staticmethod implement __call__ on it's own in order for this to just work without any fuss? Thanks.

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• Optional URL fragment in Codeigniter?

  - by DA

  This is maybe a simple syntax question or possibly a best-practices question in terms of codeigniter. I should start by saying I'm not a PHP or Codeigniter person so trying to get up to speed on helping on a project. I've found the CI documentation fairly good. The one question I can't find an answer to is how to make part of a URL optional. An example the CI documentation uses is this: example.com/index.php/products/shoes/sandals/123 and then the function used to parse the URI: function shoes($sandals, $id) For my example, I'd like to be able to modify the URL as such: example.com/index.php/products/shoes/all So, if no ID is passed, it's just ignored. Can that be done? Should that be done? A second question unrelated to my problem but pertaining to the example above, why would the variable $sandals be used as in the example, the value is 'sandals'? Shouldn't that variable be something like $shoetype?

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• Port a Rails App from Windows to Mac

  - by Ryan Max

  Hello I've been a Rails developer on Windows for quite some time now, but I recently completed my biggest project yet (it's quite extensive, took me over a year to build) but I am having trouble deploying it. The combination of it's size, complexity and a windows environment is making it needlessly complex to deploy. I am thinking about getting an old mac mini and using it just for rails development. Is there any way I can port my app to this mac, without having to start over? I can't find any resources on the internets about this.

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• is this a problem in the sp_rename function or sql server itself ?

  - by user81967

  While renaming the column name, the square bracket is included in the column name, which I think is a bug, Here is a sample code snippet, create table [TestTable] (TestColumnName nvarchar(30)) select TestColumnName from TestTable sp_rename '[TestTable].[TestColumnName]', '[RenamedColumnName]', 'Column' select [RenamedColumnName] from TestTable -- does not work "Invalid column name 'RenamedColumnName'." select RenamedColumnName from TestTable -- does not work "Invalid column name 'RenamedColumnName'." select * from [TestTable] -- works fine!!! The bug here is that the column rename includes the square brackets, I found this which says that the "first character must be one of the following", but "[" does not seem be included in the list, can there be a problem with sp_rename or sql server itself, as it allows alteration of column name to start with a square bracket.

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• MAGENTO: welcome page and pricing by city

  - by fedeisas

  Hi guys! A friend of mine asked me to build a Magento site for him. I've done some standard things before with Magento, but never really undestood how it worked inside. He sells his products across the country with different prices by city. So, he wants: a Welcome screen where the user could pick his city and then show the user the prices defined for that particular city Is this doable? Where can I start reading? Thanks in advance.

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• Perl - How to save an handler as an attribute in order to use in outside a module

  - by Zwik

  Ultimately, what I want to do is to start a process in a module and parse the output in real time in another script. What I want to do : Open a process Handler (IPC) Use this attribute outside of the Module How I'm trying to do it and fail : Open the process handler Save the handler in a module's attribute Use the attribute outside the module. Code example : #module.pm self->{PROCESS_HANDLER}; sub doSomething{ ... open( self->{PROCESS_HANDLER}, "run a .jar 2>&1 |" ); ... } #perlScript.pl my $module = new module(...); ... $module->doSomething(); ... while( $module->{PROCESS_HANDLER} ){ ... }

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• Can an application on the user's computer be started from a Firefox Extension?

  - by Saurabh Agarwal

  For example, can I start an instance of "Calculator.exe" on the user's computer (if it is available of course) upon some particular event in firefox, say clicking of a button? I thought of perhaps linking the extension to Python's subprocess method using XPCOM. But I was wondering whether there is an easier way. Additional information: I do not, at this point need to interact with the application upon its instantiation. Therefore I am looking for a way to open an application that's all. (Though, out of interest, if you have any pointers to interact with the same as well, that would be great) Thanks!

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• How to add authentication property for login to directory path when running batch file in WCF?

  - by blankon91

  I have class in my WCF service to execute batch file. when I test to run the batch file in shared directory, everything is fine, the batch was executed, but when I try to run the batch file from secure diretory, I get error "ACCESS DENIED". How to add login property so I can access my secured directory to execute my batch file? here is my code: public string ExecuteBat() { string hasil = ""; ProcessStartInfo processInfo = new ProcessStartInfo(@"D:\Rpts\SSIS_WeeklyFlash_AAF_1.bat"); processInfo.CreateNoWindow = true; processInfo.UseShellExecute = false; Process process = Process.Start(processInfo); process.WaitForExit(); if (process.ExitCode == 0) { hasil = "BAT EXECUTED!"; } else { hasil = "EXECUTE BAT FAILED"; } return hasil; }

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• Camel | Need for Scheduling console

  - by user1692063

  I am using camel 2.9.0 in my project. We have a number of routes divided into different camel contexts. Each camel context is bundled separately and deployed in Apache Karaf. Now the problem is divied into 2 parts: 1.) Each route is a scheduled route. Although using Quartz component, we are able to define a cron expressio in each route, we want a console where in we can trigger,stop any route and also put a cron expression to any route.(Scheduling a route through a web console is our main objective). 2.) Also we tried to configure the cron expression for each route through quartz.property. But if someone wants to change the cron expression at runtime in Apache Karaf, then we have to stop the bundle deployed and start in again. What can be done to change the value of cron expression at runtime. Any replies and help would be appreciable. Piyush

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• android RegEx external GPS string

  - by user1271363

  I have a problem with seperating information in a string i get from the external GPS stream. Heres a example of a string: $GPGSV,3,3,12,22,09,276,31,25,24,247,24,27,54,131,,32,04,359,19*71 $GPGLL,5703.85365,N,00953.88360,E,075510.00,A,A*69 $GPPWR,028a,1,0,1,1 $GPRMC,075511.00,A,5703.85369,N,00953.88430,E,0.335,302.17,070912,,,A*6E $GPVTG,302.17,T,,M,0.335,N,0.621,K,A*3A Want i am trying to do is to get the " $GPGLL,5703.85365,N,00953.88360,E,075510.00,A,A*69 " out so i can grab the longtitude and latitude and then update my textview with it. But keep getting string out of bounch exeption and i start wondering if i am handling this in the wrong way. Anyone that can put me in the right direction in how to solve this?

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• Linux program - reverse highlighted text

  - by Oren

  I want to develop a program that will run on the background of my Ubuntu 12.04 so when some text is selected in some textbox of any running program and some key-combination is pressed (like ctrl-F12), the text will be cut, reversed, and pasted in the same place. I know some programs that do it on windows. It is useful in some programs and web-pages that do not support right-to-left languages like arabic and hebrew - the letters are printed from left to right so the text becomes reversed. More specifically I need it in Prezi that has this kind of bug in their embedded flash editor (I thought about writing a chrome-plugin, but I don't think such plugin can manipulate the selected text inside a flash objects). Do you know if such a program exist? Where should I start reading in order to develop a program with such capabilities (manipulate selected text in other programs)? Thanks

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• Send the "ENTER" from a bash script

  - by Smat

  I am trying to create a bash script to simulate a mail attack to our mailserver. For this reason i want to create a bash script to send hundred of mails to our server, but when i launch the command: $telnet 192.168.12.1 25 <-- where 192.168.12.1 is the ip of our server The telnet session start and all the commands that i write later aren't executed. I also tried to create a second script to launch command on the telnet session after that this one are been created, but when i write from the second script: $echo -ne "EHLO domain.com\r\f" It print the command but doesn't do the ENTER so the command is not taken. Any idea?

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• Parsing String into multiple variable length String (C#)

  - by Nassign

  I am currently trying to convert a VB6 program into C#. There was extensive use of string splitting into structure. For example, Dim Sample AS String Sample = "John Doe New York Test Comment" Public Type Struct1 Name As String * 15 Address As String * 10 Comment As String * 20 End Type Dim dataStruct As Struct1 Set dataStruct = Sample When the dataStruct is set, it will automatically split value into the 3 structure member. Is there a special function to do this in C#. The only way I know how to do this is thru Attributes/Annotation describing the length and start position of string. Any other suggestion?

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• Sync between local service with a thread and an activity

  - by Henrik

  Hello all, I'm trying to think of a way on how to sync in between a local service and the main activity. The local service has, A thread with a socket connection that could receive data at any time. A list/array with data. At any time the socket could receive data and add it to the list. The activity needs to display this data. So when the activity starts up it needs to attach or start the local service and fetch the list. It also needs to be notified if the list is updated. I think I would need to sync my list somehow so the local service does not add a new entry to it while the activity fetches the list when connecting to the service. Any ideas? Thanks.

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