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• how to do server side form validation for dynamic inputs with Django

  - by Satoru.Logic

  Hi, all. I am using django.forms.Form to validate form data in a survey applications. In a survey-creating form, a user can submit multiple questions that belong to the survey being created. Names for the question inputs are in the form of 'question_seq' , where seq is maintained using Javascript. Back in the server side, my code doesn't know before hand how many such questions will be submitted. Is there any way to do this with Django form so that the form can automatically recognizes the questions and validate them?

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• mail function in windows application

  - by Ranjana

  i have used a mail function. after inserting every record simultaneously from multiple PC. I have set a timer which ticks for every 2 min. while it ticks it start to check the record and it send the mail. i have used background worker for that.in Bgdworker the mail fn will be called. private void timer_Startsendingemail_Tick(object sender, EventArgs e) { if (!bgw_startsendingemail.IsBusy) bgw_startsendingemail.RunWorkerAsync(); } private void bgw_startsendingemail_DoWork(object sender, DoWorkEventArgs e) { sendingMail(); sendingsms(); } in sendingmail() fn the datas fetch from database and send the mail based on email settings to all the inserted rec. but the prob is the timer triggered for 2 min often , and the process will be working fine and nothing there in log file but sometime the mail is not received by the clients.how to fix the prob. how to find out where it is strucked... its hard to find the problem. any idea over this??????????/

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• Entering Complex Data into Access

  - by DataMakesMeCrazy

  Fairly new to Access and trying to do something that seems simple, but may be very complex. I want to create a database of projects, each project has several phases (ie proposal, marketing, etc) and that will allow for multiple employees to work on a single project. Ie Bob and John are working on project number 102. From here, i would like to enter the forecasted start and end dates for each phase of the project, and enter the forecasted number our hours each employee will be allowed to work on that phase of that project ie. Project - Employee - Phase - Start - End - (list weeks) 102 - Bob - Marketing - 12-May-10 - 21-May-10 - 3 - 5 (3 hours first week, 5 hours the second) and so on Basically would all this data be on one table, or several? And can access dynamically show the weeks between the start and end date so that i can input the hours? I feel this database will become severely complicated :S Thanks, J

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• What should I do in order to be able to work with maven + eclipse + wicket + hibernate + spring in M

  - by spderosso

  I want to create a web app that will use wicket, hibernate and spring frameworks. My IDE of choice is Eclipse, I am using maven for the .war generation and I am running Mac OS. What steps should I follow to correctly install and configure all the tools so as to have a project running that relies on these 3 frameworks. I was able to successfully set up wicket but I am having trouble for setting up hibernate and spring. I went through multiple tutorials but I still couldn't find the solution. Thanks!

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• Accessing global variables within functions in PHP

  - by st3

  There are multiple times in one page where I need to connect and subsequently query a MySQL database, yet my code won't let me. I think it might be something to do with how my files are nested but it makes no sense. I am opening the SQL connection in the header file. The top of the offending page looks like the following: <?php $page_title = 'Dashboard'; include('templates/header.inc'); // includes a 'require_once('mysqli_connect.php') and a small query to the database; require_once('includes/functions.php'); require_once('includes/dashboard_sql.php'); // Contains functions which connect to database (which are failing.) ?> I get the PHP error Notice: Undefined variable: dbc in /Library/WebServer/Documents/pediatory_site/includes/dashboard_sql.php Where $dbc is the database connection defined in mysqli_connect.php. If anyone could help me out that would be great.

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• Creating TCP network errors for unit testing

  - by Robert S. Barnes

  I'd like to create various network errors during testing. I'm using the Berkely sockets API directly in C++ on Linux. I'm running a mock server in another thread from within Boost.Test which listens on localhost. For instance, I'd like to create a timeout during connect. So far I've tried not calling accept in my mock server and setting the backlog to 1, then making multiple connections, but all seem to successfully connect. I would think that if there wasn't room in the backlog queue I would at least get a connection refused error if not a timeout. I'd like to do this all programatically if possible, but I'd consider using something external like IPchains to intentionally drop certain packets to certain ports during testing, but I'd need to automate creating and removing rules so I could do it from within my Boost.Test unit tests. I suppose I could mock the various system calls involved, but I'd rather go through a real TCP stack if possible. Ideas?

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• Session State Anti-Pattern

  - by Curiosity

  I know the SOLID principles and other design patterns fairly well and have been programming for some time now - seeing many a bit of code throughout the years. Having said that, I'm having trouble coming up with a name to give the pattern, or lack thereof, to bits of code I've been dealing with at a current engagement. The application is an ASP.NET C# WebForms application, backed by a SQL Server/Mainframe backend (more mainframe than backend) and it's riddled with Session State properties being accessed/mutated from multiple pages/classes. Accessing/mutating global variables/application state was usually shunned upon while I was in school. Apparently the creators of this magnificent application didn't think it was such a bad idea. Question: Is there a name for such a pattern/anti-pattern that relies so heavily on Session State? I'd like to call the pig by its name ...

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• How do I choose a database?

  - by liamzebedee

  I need a comparison table of some sort for database varieties (MySQL, SQLite etc.). I can't find one. My use case is, I am implementing storage of objects in a distributed hash table. I need a database solution that is: Fast for sorting Simplistic (no users, preferably no additional structures like multiple tables etc.) Concurrent (if possible) Multi-platform File based (not stored in memory primarily) Centralized I will be programming in Go. As I understand, I believe I need what is called a Document Orientated Database, because I am storing objects, identified by keys. EDIT: While I am implementing a DHT, I will also be storing metadata about the objects, such as access counts etc. It would also be preferable to have TLL (time to live)

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• Installing WindowBuilder on Eclipse 4.2

  - by WChargin

  I'm using Eclipse Juno 4.2, downloaded from here. On previous installs, I've been using 3.7, and I've been using WindowBuilder, which I find very useful. I noticed it wasn't included this time, so I used this update site provided on this page (the zip file download gives a "file unavailable" error). However, when I run the install, it rapidly climbs to 28%, then freezes. After half an hour, I get a very long error that start with this: An error occurred while collecting items to be installed session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=). Multiple problems occurred while downloading. Unable to read repository at http://download.eclipse.org/windowbuilder/WB/integration/4.2/plugins/org.eclipse.wb.core_1.5.0.r42x201205291332.jar.pack.gz. (full text) Does anyone know how I can go about installing it?

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• Windows Mobile application icon

  - by Andy White

  Is it possible to specify the application icon for a windows mobile app from a resource file or other configuration besides the .csproj? The reason I would like to do this is because I have an application that can be configured to run in several different ways. We would like to build out three unique .cabs based on these configurations, and we would like to use a different icon for each version. One option we've considered is just running multiple builds and swapping out the icon file each time, but we were hoping there would be a way to do this using a "resource" DLL or something along those lines, that could be compiled or linked in to the main .exe.

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• Visual Studio 2008 Navigate Forewards/Backwards Buttons Don't Work As Expected

  - by TheCloudlessSky

  I just installed VS2008 on my new Win7 box. I have Navigate Backwards and Navigate Forwards buttons on my tool bar. When I change between documents, I do NOT see a list drop down for each of the buttons like should be seen here after opening multiple documents and switching between their methods: How it should work. Instead, I just see the buttons without drop downs. I find that navigating forwards and backwards doesn't work as it should. I should be able to click in different lines of the code and press the nav back/forwards buttons to jump between lines. This is not the case. Any suggestions? Thanks in advanced. PS - I installed SP1 just to see and nothing changed.

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• htaccess redirect without user knowing

  - by Khuram

  We are running multiple domains through the same code and we want to save their images in their respective folders. Here's what we are doing. /images/www.domain1.com/logo.jpg /images/www.domain2.com/logo.jpg now, what I want to know is, is this possible in htaccess that we rewrite the urls without user suspecting anything. This is what I want that <img src="/images/logo.jpg" /> should internally become through htaccess RewriteRule ^images/(.*)$ /images/{HTTP_HOST}/$1 [L,R=301] But my question is, The above redirect continually loops Can I achieve the img effect without user or admin suspecting anything? Sincerely, Khuram

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• Filtering out unique rows in MySQL

  - by jpatokal

  So I've got a large amount of SQL data that looks basically like this: user | src | dst 1 | 1 | 1 1 | 1 | 1 1 | 1 | 2 1 | 1 | 2 2 | 1 | 1 2 | 1 | 3 I want to filter out pairs of (src,dst) that are unique to one user (even if that user has duplicates), leaving behind only those pairs belonging to more than one user: user | src | dst 1 | 1 | 1 1 | 1 | 1 2 | 1 | 1 In other words, pair (1,2) is unique to user 1 and pair (1,3) to user 2, so they're dropped, leaving behind only all instances of pair (1,1). Any ideas? The answers to the question below can find the non-unique pairs, but my SQL-fu doesn't suffice to handle the complication of requiring that they belong to multiple users as well. [SQL question] How to select non "unique" rows

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• how to "lock" live site when doing (phing) deployment

  - by Jorre

  On http://www.slideshare.net/eljefe/automated-deployment-with-phing in slide 15 they are talking about "locking the live site" when doing deployment. We are running multiple webshops in a SAAS application where it is possible that users are adding products, buying products and paying for products online, and so on... When deploying we want to do this as clean as possible, so that not payments or orders or other critical data will be lost. We have a deployment scenario set up using phing (amazing tool!) but we are missing one crucial step being the "locking of the live site" while deploying. What is a possible way to lock a live site and bring it back online after deploying?

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• When to stop following the advice of static code analysis?

  - by bananeweizen

  I do use static code analysis on a project with more than 100.000 lines of Java code for quite a while now. I started with Findbugs, which gave me around 1500 issues at the beginning. I fixed the most severe over time and started using additional tools like PMD, Lint4J, JNorm and now Enerjy. With the more severe issues being fixed, there is a huge number of low severity issues. How do you handle these low priority issues? Do you try fixing all of them? Or only in newly written code? Do you regularly disable certain rules? (I found that I do on nearly any of the available tools). And if you ignore or disable rules, do you document those? What do your managers say about "leaving some thousand low priority issues not fixed"? Do you use (multiple) tool specific comments in the code or is there any better way?

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• HTML: Fill available width

  - by Thanatos

  What I'm trying to do is this: XXX Some text here YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY ZZZZZZZZZ Body body body Sidebar! Body body body Sidebar! Body body body Sidebar! X, Y, and Z are images (3 images total). Y can stretch along the X axis, and does so above, to fill the available space. (But doesn't cause "Some text here" to get squished and start breaking into multiple lines) I'd like to keep the "Some text here" part in one line. A line breaking here will not end happily. Is this possible, or should I simplify the layout around HTML?

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• How to read msmq messages (me, not the pc)

  - by illdev

  I want to look inside my queues, the msm console snapin has this property dialog, but it is very difficult to read and the messages which are important to me are encoded and look like this: 3C 3F 78 6D 6C 20 76 65 <?xml ve 72 73 69 6F 6E 3D 22 31 rsion="1 2E 30 22 20 65 6E 63 6F .0" enco 64 69 6E 67 3D 22 75 74 ding="ut 66 2D 38 22 3F 3E 0D 0A f-8"?>.. 3C 65 73 62 3A 6D 65 73 <esb:mes 73 61 67 65 73 20 78 6D sages xm 6C 6E 73 3A 65 73 62 3D lns:esb= 22 68 74 74 70 3A 2F 2F "http:// 73 65 72 76 69 63 65 62 serviceb 75 73 2E 68 69 62 65 72 us.hiber 6E 61 74 69 6E 67 72 68 natingrh ... Anyone knows of a tool that would allow me to see my messages in a bit developer friendly way? A tool for easier administering queues would come handy to (like selecting multiple messages and drag and drop them)

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• Efficiently remove points with same slope

  - by Ram

  Hi, In one of mine applications I am dealing with graphics objects. I am using open source GPC library to clip/merge two shapes. To improve accuracy I am sampling (adding multiple points between two edges) existing shapes. But before displaying back the merged shape I need to remove all the points between two edges. But I am not able to find an efficient algorithm that will remove all points between two edges which has same slope with minimum CPU utilization. Currently all points are of type PointF Any pointer on this will be a great help.

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• Inner join 2 tables one to many 2 where clauses

  - by user2892350

  I'm a relative rookie at this,so please bear with me... I have 2 tables: OrderDetail and OrderMaster...both have a column named SalesOrder. OrderDetail table has multiple rows per unique SalesOrder. OrderMaster table has one row per unique SalesOrder. OrderDetail has a column named LineType. OrderMaster has a column named OrderStatus. I want to select all records from OrderDetail that have a LineType of "1" AND whose matching SalesOrder line in the OrderMaster table has a OrderStatus column value of "4". In plain English, orders with a Status 4 are open and ready to ship, LineType value of 1 means the Detail Line is a product code. How should this query be structured? It's going into VS 2008 (VB). Many thanks in advance!!! Mike

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• Are static delegates thread-safe?

  - by leypascua

  Consider this code snippet: public static class ApplicationContext { private static Func<TService> Uninitialized<TService>() { throw new InvalidOperationException(); } public static Func<IAuthenticationProvider> AuthenticationProvider = Uninitialized<IAuthenticationProvider>(); public static Func<IUnitOfWorkFactory> UnitOfWorkFactory = Uninitialized<IUnitOfWorkFactory>(); } //can also be in global.asax if used in a web app. public static void Main(string[] args) { ApplicationContext.AuthenticationProvider = () => new LdapAuthenticationProvider(); ApplicationContext.UnitOfWorkFactory = () => new EFUnitOfWorkFactory(); } //somewhere in the code.. say an ASP.NET MVC controller ApplicationContext.AuthenticationProvider().SignIn(username, true); Are delegates in the static class ApplicationContext thread-safe in the sense that multiple-threads can invoke them? What potential problems will I face if I pursue this approach?

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• What strategies are efficient to handle concurrent reads on heterogeneous multi-core architectures?

  - by fabrizioM

  I am tackling the challenge of using both the capabilities of a 8 core machine and a high-end GPU (Tesla 10). I have one big input file, one thread for each core, and one for the the GPU handling. The Gpu thread, to be efficient, needs a big number of lines from the input, while the Cpu thread needs only one line to proceed (storing multiple lines in a temp buffer was slower). The file doesn't need to be read sequentially. I am using boost. My strategy is to have a mutex on the input stream and each thread locks - unlocks it. This is not optimal because the gpu thread should have a higher precedence when locking the mutex, being the fastest and the most demanding one. I can come up with different solutions but before rush into implementation I would like to have some guidelines. What approach do you use / recommend ?

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• How can I speed up Netbeans Task Marker resolution?

  - by Stephen

  I'm trying to quickly navigate and fix problems in code in Netbeans, and it just takes too long. I'll fix a problem, and it will take seconds to re-compile. While this is happening, the marker remains, and all the others that depend on it will too (requiring multiple next-marker key strokes to get to a "new" problem). If I'm doing a fix that changes the number of lines (e.g. organise imports), the markers will navigate to the wrong place, even though the correct text is underlined. Is there a way to speed this up? I presume it's because it's doing a full file compilation via javac to calculate the markers. BUT the information is available in netbeans, because the correct text is underlined, even when the compilation occurs.

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• Good Silverlight 4.0 chart / graph component?

  - by Duncan Bayne

  I've been using the Silverlight Toolkit but I'm finding the quality lacking; in particular this memory leak / phantom point bug renders the Chart component completely unusable. Can anyone recommend a good chart / graph component for Silverlight 4.0? I'm looking for one that provides: multiple simultaneous series, both scatter and line multi-select of points configurable tool-tips automatic axis scaling real-time update of data That last point sounds trivial but is tripping up the Silverlight Toolkit Chart; if you rapidly change the axis range, it sometimes leaves phantom points behind in addition to the points it should be displaying.

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• Can't read output of httpservice

  - by tag

  I have an HTTPservice that uses id="myhttp" url="site.com/script.php" method="POST" resultFormat="xml" script.php returns $output = '' . $worked . ''; echo $output; Problem is when I try to read worked, it tells me the variable worked is not there event.result.worked myhttp.lastResult.worked The only thing that works is using toString() myhttp.lastResult.toString() or event.result.toString() What am I doing wrong? I plan to add other variables to the output time, so need to access each time and worked separately. I may also need to return multiple responses each with their own worked and time values. How do I do that. I was thinking to not use XML. Is there a more lightweight option. Flex shows I have the following options: array e4x flashvars object text xml

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• Converting code to perl sub, but not sure I'm doing it right

  - by Ben Dauphinee

  I'm working from a question I posted earlier (here), and trying to convert the answer to a sub so I can use it multiple times. Not sure that it's done right though. Can anyone provide a better or cleaner sub? sub search_for_key { my ($args) = @_; foreach $row(@{$args->{search_ary}}){ print "@$row[0] : @$row[1]\n"; } my $thiskey = NULL; my @result = map { $args->{search_ary}[$_][0] } # Get the 0th column... grep { @$args->{search_in} =~ /$args->{search_ary}[$_][1]/ } # ... of rows where the 0 .. $#array; # first row matches $thiskey = @result; print "\nReturning: " . $thiskey . "\n"; return $thiskey; } search_for_key({ 'search_ary' => $ref_cam_make, 'search_in' => 'Canon EOS Rebel XSi' });

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