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  • Passing Binary Data to a Stored Procedure in SQL Server 2008

    - by Joe Majewski
    I'm trying to figure out a way to store files in a database. I know it's recommended to store files on the file system rather than the database, but the job I'm working on would highly prefer using the database to store these images (files). There are also some constraints. I'm not an admin user, and I have to make stored procedures to execute all the commands. This hasn't been of much difficulty so far, but I cannot for the life of me establish a way to store a file (image) in the database. When I try to use the BULK command, I get an error saying "You do not have permission to use the bulk load statement." The bulk utility seemed like the easy way to upload files to the database, but without permissions I have to figure a work-a-round. I decided to use an HTML form with a file upload input type and handle it with PHP. The PHP calls the stored procedure and passes in the contents of the file. The problem is that now it's saying that the max length of a parameter can only be 128 characters. Now I'm completely stuck. I don't have permissions to use the bulk command and it appears that the max length of a parameter that I can pass to the SP is 128 characters. I expected to run into problems because binary characters and ascii characters don't mix well together, but I'm at a dead end... Thanks

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  • Doing Cross-platform builds with Qt Creator

    - by Joe Cannatti
    I am working on a desktop application using the Qt framework and Qt Creator IDE. I am doing my development on mac, and would like to begin testing on Windows as well. I am having trouble finding documentation on how do this. What's is the best way to develop on mac and automate windows builds of a Qt Creator project?

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  • More free geek-read.December SolidQ Journal is online

    - by Greg Low
    I'm really excited to see the last SolidQ Journal for this year out the door. It's our free online magazine. I've been wondering about the future of printed technical magazines for a long time. I doubt they have much of a future, as online publications become more prevalent and more timely. By the time a print magazine gets to you, it's such a long time since the author wrote the material that it's hard to even retain relevance in a fast moving world. That's why I'm so happy to have the format we...(read more)

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  • PHP - Tricky... array into columns, but in a specific order.

    - by Joe
    <?php $combinedArray = array("apple","banana","watermelon","lemon","orange","mango"); $num_cols = 3; $i = 0; foreach ($combinedArray as $r ){ /*** use modulo to check if the row should end ***/ echo $i++%$num_cols==0 ? '<div style="clear:both;"></div>' : ''; /*** output the array item ***/ ?> <div style="float:left; width:33%;"> <?php echo $r; ?> </div> <?php } ?> <div style="clear:both;"></div> The above code will print out the array like this: apple --- banana --- watermelon lemon --- orange --- mango However, I need it like this: apple --- watermelon --- orange banana --- lemon --- mango Do you know how to convert this? Basically, each value in the array needs to be placed underneath the one above, but it must be based on this same structure of 3 columns, and also an equal amount of fruits per column/row (unless there was like 7 fruits there would be 3 in one column and 2 in the other columns. Sorry I know it's confusing lol

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  • Is loose coupling w/o use cases an anti-pattern?

    - by dsimcha
    Loose coupling is, to some developers, the holy grail of well-engineered software. It's certainly a good thing when it makes code more flexible in the face of changes that are likely to occur in the foreseeable future, or avoids code duplication. On the other hand, efforts to loosely couple components increase the amount of indirection in a program, thus increasing its complexity, often making it more difficult to understand and often making it less efficient. Do you consider a focus on loose coupling without any use cases for the loose coupling (such as avoiding code duplication or planning for changes that are likely to occur in the foreseeable future) to be an anti-pattern? Can loose coupling fall under the umbrella of YAGNI?

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  • Optimum size of transaction in Postgres?

    - by Joe
    I'm running a process that does a lot of updates ( 100,000) to a table. I have the choice between putting all the updates in a single transaction or committing transactions every 1000 or so. Ignore for the moment the case where a transaction fails and is aborted. I'm interested in the best size of transaction for memory and speed efficiency.

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  • How can I get SQL Server transactions to use record-level locks?

    - by Joe White
    We have an application that was originally written as a desktop app, lo these many years ago. It starts a transaction whenever you open an edit screen, and commits if you click OK, or rolls back if you click Cancel. This worked okay for a desktop app, but now we're trying to move to ADO.NET and SQL Server, and the long-running transactions are problematic. I found that we'll have a problem when multiple users are all trying to edit (different subsets of) the same table at the same time. In our old database, each user's transaction would acquire record-level locks to every record they modified during their transaction; since different users were editing different records, everyone gets their own locks and everything works. But in SQL Server, as soon as one user edits a record inside a transaction, SQL Server appears to get a lock on the entire table. When a second user tries to edit a different record in the same table, the second user's app simply locks up, because the SqlConnection blocks until the first user either commits or rolls back. I'm aware that long-running transactions are bad, and I know that the best solution would be to change these screens so that they no longer keep transactions open for a long time. But since that would mean some invasive and risky changes, I also want to research whether there's a way to get this code up and running as-is, just so I know what my options are. How can I get two different users' transactions in SQL Server to lock individual records instead of the entire table? Here's a quick-and-dirty console app that illustrates the issue. I've created a database called "test1", with one table called "Values" that just has ID (int) and Value (nvarchar) columns. If you run the app, it asks for an ID to modify, starts a transaction, modifies that record, and then leaves the transaction open until you press ENTER. I want to be able to start the program and tell it to update ID 1; let it get its transaction and modify the record; start a second copy of the program and tell it to update ID 2; have it able to update (and commit) while the first app's transaction is still open. Currently it freezes at step 4, until I go back to the first copy of the app and close it or press ENTER so it commits. The call to command.ExecuteNonQuery blocks until the first connection is closed. public static void Main() { Console.Write("ID to update: "); var id = int.Parse(Console.ReadLine()); Console.WriteLine("Starting transaction"); using (var scope = new TransactionScope()) using (var connection = new SqlConnection(@"Data Source=localhost\sqlexpress;Initial Catalog=test1;Integrated Security=True")) { connection.Open(); var command = connection.CreateCommand(); command.CommandText = "UPDATE [Values] SET Value = 'Value' WHERE ID = " + id; Console.WriteLine("Updating record"); command.ExecuteNonQuery(); Console.Write("Press ENTER to end transaction: "); Console.ReadLine(); scope.Complete(); } } Here are some things I've already tried, with no change in behavior: Changing the transaction isolation level to "read uncommitted" Specifying a "WITH (ROWLOCK)" on the UPDATE statement

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  • Blackberry Application not deploying in simulator from eclipse

    - by Joe
    I wrote a first sample Hello World Program for BB in eclipse using the plugin and everything worked fine. But then I wrote another app, not much different from the first and I went to deploy it and the simulator opened but only the first application was there. I tried loading the .cod file from inside the simulator but that didn't work either. I also tried exiting and resetting the simulator and using the clean.bat file but none of that worked either. Finally I tried to load another sample program I downloaded from RIM and that worked just fine. Help! I'm completely stuck.

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  • SetCursor reverts after a mouse move

    - by Joe Ludwig
    I am using SetCursor to set the system cursor to my own image. The code looks something like this: // member on some class HCURSOR _cursor; // at init time _cursor = LoadCursorFromFile("somefilename.cur"); // in some function SetCursor(_cursor); When I do this the cursor does change, but on the first mouse move message it changes back to the default system arrow cursor. This is the only code in the project that is setting the cursor. What do I need to do to make the cursor stay the way I set it?

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  • Write a PLIST file in Groovy

    - by Joe Cannatti
    I have a Groovy application for Windows and am trying to convert a Hash object to an Apple plist file. What is the best way to go about this? Seems like this is something that must already be solved in Java but I can't seem to find any examples. Thanks in advance

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  • Can't modify constant item in scalar assignment

    - by joe
    sub new { my $class = shift; my $ldap_obj = Net::LDAP->new( 'test.company.com' ) or die "$@"; my $self = { _ldap = $ldap_obj, _dn ='dc=users,dc=ldap,dc=company,dc=com', _dn_login = 'dc=login,dc=ldap,dc=company,dc=com', _description ='company', }; # Print all the values just for clarification. bless $self, $class; return $self; } what is wrong on this code : i got this error Can't modify constant item in scalar assignment at Core.pm line 12, near "$ldap_obj,"

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  • Is it important to dispose SolidBrush and Pen?

    - by Joe
    I recently came across this VerticalLabel control on CodeProject. I notice that the OnPaint method creates but doesn't dispose Pen and SolidBrush objects. Does this matter, and if so how can I demonstrate whatever problems it can cause? EDIT This isn't a question about the IDisposable pattern in general. I understand that callers should normally call Dispose on any class that implements IDisposable. What I want to know is what problems (if any) can be expected when GDI+ object are not disposed as in the above example. It's clear that, in the linked example, OnPaint may be called many times before the garbage collector kicks in, so there's the potential to run out of handles. However I suspect that GDI+ internally reuses handles in some circumstances (for example if you use a pen of a specific color from the Pens class, it is cached and reused). What I'm trying to understand is whether code like that in the linked example will be able to get away with neglecting to call Dispose. And if not, to see a sample that demonstrated what problems it can cause. I should add that I have very often (including the OnPaint documentation on MSDN) seen WinForms code samples that fail to dispose GDI+ objects.

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  • Custom Java events with listeners vs. a JMS based implementation?

    - by Joe Dean
    My application requires events to be fired based on some specific activities that happen. I'm trying to determine if I should create my own event handling system using the Java EventObject with custom listeners similar to Java AWT Or should I use a JMS implementation? I was considering either apache's Qpid or ActiveMQ solution. I'm exploring these options at the moment and was wondering if anyone has experience with Qpid or ActiveMQ and can offer some advise (e.g., pros, cons to consider, etc) Also, if anyone has any suggestions for building a simple event handling system... if it's even worth while to consider this over a JMS based solution.

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  • How to make a composite Zend Form Element that includes a Dojo Field

    - by Joe
    I used the zendcast video to get me this far. The form is properly displayed. However, I need to change the display order box into a number box of zend dojo type. I cannot figure it out. Even help with examples would be great. <?php class My_View_Helper_CategoryDetailElement extends Zend_View_Helper_FormElement { protected $html = ''; public function CategoryDetailElement($name, $value = null, $attribs = null) { $type = $description = $displayOrder = $time = ''; if($value) { $type = $value->type; $description = $value->description; $displayOrder = $value->displayOrder; $time = $value->time; } $helper = new Zend_View_Helper_FormText(); $helper->setView($this->view); $helper_label = new Zend_View_Helper_FormLabel(); $helper_label->setView($this->view); $helper_select = new Zend_View_Helper_FormSelect(); $helper_select->setView($this->view); $helper_textarea = new Zend_View_Helper_FormTextarea(); $helper_textarea->setView($this->view); $this->html .= $helper_label->formLabel($name . '[type]', 'Type: ', array()); $this->html .= $helper_select->formSelect($name . '[type]', $type, array(), array('individual'=>'individual', 'team'=>'team')); $this->html .= "<br />"; $this->html .= $helper_label->formLabel($name . '[description]', 'Description: ', array()); $this->html .= $helper_textarea->formTextarea($name . '[description]', $description, array()); $this->html .= "<br />"; $this->html .= $helper_label->formLabel($name . '[displayOrder]', 'Display Order: ', array()); $this->html .= $helper->formText($name . '[displayOrder]', $displayOrder, array()); $this->html .= "<br />"; $this->html .= $helper_label->formLabel($name . '[time]', 'Time: ', array()); $this->html .= $helper->formText($name . '[time]', $time, array()); return $this->html; } } ?>

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  • Harnessing Business Events for Predictive Decision Making - part 1 / 3

    - by Sanjeev Sharma
    Businesses have long relied on data mining to elicit patterns and forecast future demand and supply trends. Improvements in computing hardware, specifically storage and compute capacity, have significantly enhanced the ability to store and analyze mountains of data in ever shrinking time-frames. Nevertheless, the reality is that data growth is outpacing storage capacity by a factor of two and computing power is still very much bounded by Moore's Law, doubling only every 18 months.Faced with this data explosion, businesses are exploring means to develop human brain-like capabilities in their decision systems (including BI and Analytics) to make sense of the data storm, in other words business events, in real-time and respond pro-actively rather than re-actively. It is more like having a little bit of the right information just a little bit before hand than having all of the right information after the fact. To appreciate this thought better let's first understand the workings of the human brain.Neuroscience research has revealed that the human brain is predictive in nature and that talent is nothing more than exceptional predictive ability. The cerebral-cortex, part of the human brain responsible for cognition, thought, language etc., comprises of five layers. The lowest layer in the hierarchy is responsible for sensory perception i.e. discrete, detail-oriented tasks whereas each of the above layers increasingly focused on assembling higher-order conceptual models. Information flows both up and down the layered memory hierarchy. This allows the conceptual mental-models to be refined over-time through experience and repetition. Secondly, and more importantly, the top-layers are able to prime the lower layers to anticipate certain events based on the existing mental-models thereby giving the brain a predictive ability. In a way the human brain develops a "memory of the future", some sort of an anticipatory thinking which let's it predict based on occurrence of events in real-time. A higher order of predictive ability stems from being able to recognize the lack of certain events. For instance, it is one thing to recognize the beats in a music track and another to detect beats that were missed, which involves a higher order predictive ability.Existing decision systems analyze historical data to identify patterns and use statistical forecasting techniques to drive planning. They are similar to the human-brain in that they employ business rules very much like mental-models to chunk and classify information. However unlike the human brain existing decision systems are unable to evolve these rules automatically (AI still best suited for highly specific tasks) and  predict the future based on real-time business events. Mistake me not,  existing decision systems remain vital to driving long-term and broader business planning. For instance, a telco will still rely on BI and Analytics software to plan promotions and optimize inventory but tap into business events enabled predictive insight to identify specifically which customers are likely to churn and engage with them pro-actively. In the next post, i will depict the technology components that enable businesses to harness real-time events and drive predictive decision making.

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  • linq, selecting columns as IEnumerable<DataRow>

    - by joe
    how can i do in linq: IEnumerable<DataRow> query = from rec in dt.AsEnumerable() where rec.Field<decimal>("column2") == 1 && foo(rec.Field<decimal>("column1")) select new { column1 = rec.Field<decimal>("column1"), column2 = rec.Field<decimal>("column2"), column3 = rec.Field<decimal>("column3")} ; this does not work. Im trying to select some columns as new datatable then join it later with some other datatable.

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  • Sharing Jinja2 templates between Pylons and Django applications

    - by Joe Holloway
    I'm writing a couple of Jinja2 templates that basically implement some common grid layouts. I'd like to be able to share this 'library' of templates between a Pylons app and Django app. I've hit a minor stumbling block in that Django's template context is accessible from the "top-level" of the template, whereas Pylons wraps your context inside the thread local c (or tmpl_context) variable. Here are some analogous examples that demonstrate this. Django from django.shortcuts import render_to_response ctx = {} ctx['name'] = 'John' return render_to_response('hello.html', ctx) hello.html: Hello {{ name }} Pylons from pylons import tmpl_context as c from myapp.lib.base import render c.name = 'John' return render('hello.html') hello.html: Hello {{ c.name }} What I'm trying to do is make it so that hello.html is the same across both frameworks. One way I see to do it is by wrapping the Django render_to_response and do something like this: ctx['c'] = ctx But that just doesn't feel right. Anybody see other alternatives to this? Thanks

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  • Rails unknown action suddenly everywhere

    - by Joe
    The weird thing is that my app was working perfectly on Sat, and when I check it out on Monday (after doing nothing to it) I kept getting this problem: This behaviour is only happening on my production server. When I try to login or create a new user or do something that interacts with a form I am getting an unknown action error. A simple retrieval of rows does not throw this error however. I don't have all CRUD operations in most of my controllers because it's not necessary - but Rails always looks for the one that doesn't exist - it seams so anyway. If I make a mistake in the form that would normally throw a validation message to the user it will throw this error too, does that mean it has something to do with the model too (I'm not too Rails experienced and didn't know if that would be the case or not)? This is a general error I am getting - I have super_exception_notifier gem installed, so that's what all the extra params are. Processing SessionsController#new (for OMITTED at 2010-04-12 09:11:12) [GET] Rendering template within layouts/application Rendering sessions/new Completed in 3ms (View: 2, DB: 0) | 200 OK [http://OMITTED.com/session/new] Processing SessionsController#show (for OMITTED at 2010-04-12 09:11:14) [GET] ActionController::UnknownAction (No action responded to show. Actions: create, destroy, error_class_status_codes, error_class_status_codes=, error_layout, error_layout=, exception_notifiable_notification_level, exception_notifiable_notification_level=, exception_notifiable_silent_exceptions, exception_notifiable_silent_exceptions=, exception_notifiable_verbose, exception_notifiable_verbose=, http_status_codes, http_status_codes=, and new): dragonfly (0.5.3) lib/dragonfly/middleware.rb:13:in `call' passenger (2.2.9) lib/phusion_passenger/rack/request_handler.rb:92:in `process_request' passenger (2.2.9) lib/phusion_passenger/abstract_request_handler.rb:207:in `main_loop' passenger (2.2.9) lib/phusion_passenger/railz/application_spawner.rb:400:in `start_request_handler' passenger (2.2.9) lib/phusion_passenger/railz/application_spawner.rb:351:in `handle_spawn_application' passenger (2.2.9) lib/phusion_passenger/utils.rb:184:in `safe_fork' passenger (2.2.9) lib/phusion_passenger/railz/application_spawner.rb:349:in `handle_spawn_application' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:352:in `__send__' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:352:in `main_loop' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:163:in `start' passenger (2.2.9) lib/phusion_passenger/railz/application_spawner.rb:209:in `start' passenger (2.2.9) lib/phusion_passenger/spawn_manager.rb:262:in `spawn_rails_application' passenger (2.2.9) lib/phusion_passenger/abstract_server_collection.rb:126:in `lookup_or_add' passenger (2.2.9) lib/phusion_passenger/spawn_manager.rb:256:in `spawn_rails_application' passenger (2.2.9) lib/phusion_passenger/abstract_server_collection.rb:80:in `synchronize' passenger (2.2.9) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize' passenger (2.2.9) lib/phusion_passenger/spawn_manager.rb:255:in `spawn_rails_application' passenger (2.2.9) lib/phusion_passenger/spawn_manager.rb:154:in `spawn_application' passenger (2.2.9) lib/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:352:in `__send__' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:352:in `main_loop' passenger (2.2.9) lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously' This is what one of my forms looks like (nothing special) <% form_tag session_path do -%> <p><%= label_tag 'Username' %><br /> <%= text_field_tag 'login', @login %></p> <p><%= label_tag 'password' %><br/> <%= password_field_tag 'password', nil %></p> <p><%= label_tag 'remember_me', 'Remember me' %> <%= check_box_tag 'remember_me', '1', @remember_me %></p> <p><%= submit_tag 'Log in' %></p> <% end -%> It looks like dragonfly is the culprit doesn't it, here's the section from the gem files it says is being naughty: module Dragonfly class Middleware def initialize(app, dragonfly_app_name) @app = app @dragonfly_app_name = dragonfly_app_name end def call(env) response = endpoint.call(env) if response[0] == 404 13 -->> @app.call(env) else response end end I don't know what goes on behind the scenes here so I probably haven't been looking in the right place to fix this issue. Like I said it only throws this in a production environment, which guess is what the 'env' variable is referencing. Thank you for your time! I've spent nearly my whole day trying to figure this out! :(

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  • NSBitmapImageRep data Format as application icon image??

    - by Joe
    i have a char* array of data that was in RGBA and then moved to ARGB Bottom line is the set application image looks totally messed up and i cant put my finger on why? //create a bitmap representation of the image data. //The data is expected to be unsigned char** NSBitmapImageRep *bitmap = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes : (unsigned char**) &dest pixelsWide:width pixelsHigh:height bitsPerSample:8 samplesPerPixel:4 hasAlpha:YES isPlanar:NO colorSpaceName:NSDeviceRGBColorSpace bitmapFormat:NSAlphaFirstBitmapFormat bytesPerRow: 0 bitsPerPixel:0 ]; NSImage *image = [[NSImage alloc] initWithSize:NSMakeSize(width, height)]; [image addRepresentation:bitmap]; if( image == NULL) { printf("image is null\n"); fflush(stdout); } [NSApp setApplicationIconImage :image]; What in these values is off? the image looks very multicolored and pixelated, with transparent parts/lines as well.

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  • Change windows hostname from command line

    - by Joe
    This question is related to http://stackoverflow.com/questions/54989/change-windows-hostname-from-command-line, but I'm in a different situation. The netdom tool will not work on a computer not joined to a domain. I've tried setting the hostname from the registry, but I was wondering if there was another way from the command-line.

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