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• Handling missing resources

  - by Domchi

  I've just found myself in situation where I needed to handle exception I'll probably never get, so out of curiosity, let's do a small poll. Do you validate the presence of resources in your programs? I mean, those resources which are installed with your program, like icons, images and similar. Generally, if those are missing, either your install didn't do its job, or the user randomly deleted files in your app. If you do validate the presence, what do you do when the files are not there? Of course, for web apps, you'll have nice 404 page or broken link, but what about the rest? Fail early, yes, but leave handling failures to your compiler, or what?

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• What is your ratio Bug fixing vs Enhancements ?

  - by Newtopian

  In the spirit of this question I wanted to have a sense of what is the proportion of time split between fixing bugs and implementing new features. If possible try to give an estimate for the product as a whole as opposed to individual developer stats and try to make an average over the course of a typical year. Do provide a general descriptive of the product/project to allow comparison. Specifically : Maturity of project Is it still actively developed or strictly in maintenance ? Size estimate of the product/project Size of team developing it (all inclusive) What is your team score on the Joel test. Ex : approx 80% time spent bug fixes 20% new stuff Mature software (20 years old) Actively developed 1.5M Line of Text, approx 700k - 900k LOC 12-15 actively coding in it. we got 5/12 for sure, some would say 7/12.

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• pyopengl: Could it replace c++ ?

  - by Tom

  Hi everyone. I'm starting a computer graphics course, and I have to choose a language. Choices are between C++ and Python. I have no problem with C++, python is a work in progress. So i was thinking to go down the python road, using pyopengl for graphics part. I have heard though, that performance is an issue. Is python / pyopengl mature enough to challenge C++ on performance? I realize its a long shot, but I'd like to hear your thoughts, experiences on uses of pyopengl. Thanks in advance.

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• linq2sql and multiple joins

  - by zerkms

  is it possible to do multiple joins: from g in dataContext.Groups join ug in dataContext.UsersGroups on g.Id equals ug.GroupId join u in dataContext.Users on u. where ug.UserId == user.Id select GroupRepository.ToEntity(g); in the sample above all is fine until i press "." in the end of the 3rd line. there i expect to get intellisense and write u.Id == ug.UserId but it doesn't appear. and of course this code doesn't compile after. what did i wrong?

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• How do I ignore the Perl shebang on Windows with Apache 2?

  - by nbolton

  I have set up a local Perl web environment on my Windows machine. The application I'm working on is originally from a Linux server, and so the shebang for source .pl files look like so: #!/usr/bin/perl This causes the following error on my Windows dev machine: (OS 2)The system cannot find the file specified. Is it possible to change my Apache 2 conf so that the shebang is ignored on my Windows machine? Of course I could set the shebang to #!c:\perl\bin\perl.exe, that much is obvious; but the problem comes to deploying the updated files. Clearly it would be very inconvenient to change this back on each deploy. I am using ActivePerl on Windows 7. Update: I should have mentioned that I need to keep the shebang so that the scripts will work on our shared hosting Linux production server. If I did not have this constraint and I didn't have to use the shebang, the obvious answer would be to just not use it.

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• Dangers of Windows API and Administrator accounts?

  - by Brett Powell

  I wrote a game server plugin last night that allowed me to create a user account and set it as administrator, which is a huge problem. Of course the simple fix is to create a basic user account with limited privileges for the game servers, so they would not have access to do things like this. I wanted to find out if there's anything else in the Windows API that would create such a huge vulnerability though? I guess I want to just make sure that when the client's game servers accounts are moved to limited access accounts, we won't have to worry about any of them using the windows API to sabotage the machines. There is already enough exploits in the game itself to worry about, without having to worry about client's taking over the machines with plugins lol. Some of the questions relative would be... Can you disable/enable Remote Desktop from c++? Can you get a list of AD user groups from c++? (not that a user belongs to, but a complete list)

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• Problem With HTML5 Application Cache Whitelist - Won't Ignore Items

  - by Ryan Donnelly

  I'm trying to use HTML5 Application Cache to speed some things up on an iPhone webapp. It works great for storing images, css and JS, but the problem is that it also tries to store the HTML. I haven't been able to get it to ignore the html and stop storing it in the cache. From what I've read, I have to "whitelist" the files and directories that I want to load no matter what. I've tried listing the files I want cached explicitly, and I've tried adding a series of things under the "NETWORK:" heading. I've tried * / /* http://mysite.com http://mysite.com/ http://mysite.com/* None of them seem to work. Is there any way to ignore HTML files by MIME-Type or anything? Any advice would be appreciated. Ryan P.S. Of course, my site is not mysite.com..I just used that for simplicity.

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• Help with Django localization--doesn't seem to be working. Nothing happens

  - by alex

  Can someone help me with Localization? I put {% trans "..." %} in my template, I filled in my django.po after running "makemessages". #: templates/main_content.html:136 msgid "Go to page" msgstr "¦~C~Z¦~C¦¦~B¦¦~L~G¦~Z" #: templates/main_content.html:138 msgid "Page" msgstr "¦~C~Z¦~C¦¦~B¦" #: templates/main_content.html:154 msgid "Next" msgstr "?" Then, I set LANGUAGES={} in my settings.py along with "gettext lambda": gettext = lambda s: s LANGUAGES = ( ('de', gettext('German')), ('en', gettext('English')), ('ja', gettext('Japanese')), ) Of course, I installed the LocaleMiddleware. I also set the request.session['django_language'] = "ja" How do I test that this is working? How do I see japanese on my site!?

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• Is it possible to compile IronRuby code to a .NET assembly (EXE or DLL)

  - by Chris Ammerman

  My scenario consists of the following points. I have a packaged software product I am developing in C# Since it is a packaged product, the public interfaces of the assemblies need to be tightly controlled... All assemblies are strong-named Any classes that don't absolutely have to be "public" are "internal" I want to write unit tests for those "internal" classes, since they are the bulk of the code And finally.... I want to try writing the unit tests in Ruby. Since the unit tests would be external to the assembly containing the code under test, the assemblies under test would each need to have an "InternalsVisibleTo" attribute specifying the name of the unit test assembly. Which of course would mean that the Ruby unit tests would have to compile down to a .NET assembly so they can be given access in this way. Can this be done? If so, how? All I can find on the web about "compiling IronRuby" is about building the actual IronRuby runtime from source.

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• file_column not creating files, just empty tmp directory

  - by Yanaek

  Up to the end of December 2009 everything worked fine, so i assume that after some upgrades on servers (Ubuntu 8.10 and second Ubuntu 9.10) something stopped working. Model: class Product < ActiveRecord::Base belongs_to :category file_column :thumbnail, :magick = { :geometry = "150x100" } there is of course table 'products' in database, and it has column 'thumbnail' what's interesting that File actually is uploaded to server, it goes to the /tmp directory under RackMultipartXXXX-0 name, and it is unmodified image. The problem is, that then this file is not moved to 'tmp' dir under RAILS_ROOT/public/product/ nor the 'XX' (where xx means ID of a product) under public/product also. i don't know what to do, i spend few HOURS trying different versions of file_column, also trying to make new, test rails application only from scaffold, but then, in this new application problem was the same

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• Passing additional arguments into the OnClick event handler of a LinkButton using Javascript

  - by Jens Ameskamp

  Hi! I have a ASP.NET Website, where, in a GridView item template, automatically populated by a LinqDataSource, there is a LinkButton defined as follows: <asp:LinkButton ID="RemoveLinkButton" runat="server" CommandName="Remove" CommandArgument='<%# DataBinder.GetPropertyValue(GetDataItem(), "Id")%>' OnCommand="removeVeto_OnClick" OnClientClick='return confirm("Are you sure?");' Text="Remove Entry" /> This works fine. Whenever the Button is Clicked, a confirmation dialog is displayed. What I am trying to do now, is to allow the user to enter a reason for the removal, and pass this on the the OnClick event handler. How would I do this? I tried OnClientClick='return prompt("Enter your reason!");', but, of course, that did not work =)

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• Is it possible to chain -ms-filters in CSS?

  - by Jakub Hampl

  Does anyone know of a way to chain the proprietary filter properties in CSS. For example I have a div.example and I want to give it a background gradient and a drop shadow. So I'd like to do something like this: div.example { /* gradient */ filter: progid:DXImageTransform.Microsoft.Gradient(startColorstr=#cb141e78,endColorstr=#cb1dde78); /* shadow */ filter: progid:DXImageTransform.Microsoft.dropShadow(color=00143c, offX=0, offY=3, positive=true); } Except this will of course leave only the drop shadow. Anyone know a good workaround?

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• Database Replication OOD Pattern

  - by MrOnigiri

  Greetings fellow overflowers, After reading on MSDN about correct strategies on how to perform database replication, and understanding their suggestion on Master-Subordinate Incremental Replication. It left me wondering, what OOD design pattern should I use on this... The main elements of this strategy are the Acquirer, the Manipulator and the Writer. The first fetches data from the database and passes on to the second which might perform simple transformations to the data, before handling it to the final element, the writer, that writes the desired data on the destination Database. I thought about using the Chain of Responsibility pattern, but the Acquirer, Manipulator and Writer don't share a common role among theme, so It makes no sense. Should these elements be written as separate classes, or methods inside my service? Of course I'll be creating a DB Helper class as well, but that doesn't constitutes a problem. Wondering what your opinions on this are! Thanks for your replies

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• What are some topics you'd like to see covered in an 'Introduction to Network Security' book?

  - by seth.vargo

  I'm trying to put together a list of topics in Network Security and prioritize them accordingly. A little background on the book - we are trying to gear the text towards college students, as an introduction to security, and toward IT professionals who have recently been tasked with securing a network. The idea is to create a book that covers the most vital and important parts of securing a network with no assumptions. So, if you were a novice student interested in network security OR an IT professional who needed a crash course on network security, what topics do you feel would be of the upmost importance in such a text?

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• Performance differences between iframe hiding methods?

  - by Ender

  Is there a major performance difference between the following: <iframe style="visibility:hidden" /> <iframe style="width:0px; height:0px; border:0px" /> I'm using a hidden iframe to pull down and parse some information from an external server. If the iframe actually attempts to render the page, this may suck up a lot of CPU cycles. Of course, I'd ideally just want to get the raw markup - for example, if I could prevent the iframe from loading img tags, that would be perfect.

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• Why does clearing an SQLite database not reduce its size?

  - by Thorsten Lorenz

  I have an SQLite database. I created the tables and filled them with a considerable amount of data. Then I cleared the database by deleting and recreating the tables. I confirmed that all the data had been removed and the tables were empty by looking at them using SQLite Administrator. The problem is that the size of the database file (*.db3) remained the same after it had been cleared. This is of course not desirable as I would like to regain the space that was taken up by the data once I clear it. Did anyone make a similar observation and/or know what is going on? What can be done about it?

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• What tools are people using to measure SQL Server database performance?

  - by Paul McLoughlin

  I've experimented with a number of techniques for monitoring the health of our SQL Servers, ranging from using the Management Data Warehouse functionality built into SQL Server 2008, through other commercial products such as Confio Ignite 8 and also of course rolling my own solution using perfmon, performance counters and collecting of various information from the dynamic management views and functions. What I am finding is that whilst each of these approaches has its own associated strengths, they all have associated weaknesses too. I feel that to actually get people within the organisation to take the monitoring of SQL Server performance seriously whatever solution we roll out has to be very simple and quick to use, must provide some form of a dashboard, and the act of monitoring must have minimal impact on the production databases (and perhaps even more importantly, it must be possible to prove that this is the case). So I'm interested to hear what others are using for this task? Any recommendations?

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• EF problem with entity re-ordering and uniqueness constraint

  - by wpfwannabe

  I am using Entity Framework and I've come to an interesting stumbling block. Let's say there is a db table "Item" with "sequence" column of type int (and others of course). Column "sequence" must be unique and it is used for (re)ordering of items. EF maps this table to "Item" class with "sequence" int property. Now let's say I want to swap position of two items by mutually exchanging each other's sequence number. Upon calling SaveChanges() EF throws an exception complaining about "sequence" uniqueness. It probably generates two UPDATEs and the first one probably fails. I assume that plain SQL solution to this issue is using a third UPDATE to introduce a unique sequence value in the process but I am stuck with EF. Any thoughts?

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• C code autocomplete in Eclipse

  - by Ittai

  Hi, I'm a Java developer and I've downloaded the Eclipse for C (course purposes) and to my amazement the control+space shortcut (for autocomplete) did not work. I've created a new project and a new class using the wizzards and started to type "print" and then tried to find an autocomplete feature. After a bit of googling I arrived at C/C++-Editor-Content Assist-Advanced and there I verified that Help proposals,Parsing-based proposals and Template proposals options were checked. I then went over to the Keys preferences page using the link at that page and entered a binding for all relevant content assist from before C\C++ Content Assist (type...) and chose in the When box the C\C++ Editor option. But alas no autocompletion was offered. Can someone please point me to the right direction? Thanks, Ittai

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• Why is a fixed size buffers (arrays) must be unsafe?

  - by brickner

  Let's say I want to have a value type of 7 bytes (or 3 or 777). I can define it like that: public struct Buffer71 { public byte b0; public byte b1; public byte b2; public byte b3; public byte b4; public byte b5; public byte b6; } A simpler way to define it is using a fixed buffer public struct Buffer72 { public unsafe fixed byte bs[7]; } Of course the second definition is simpler. The problem lies with the unsafe keyword that must be provided for fixed buffers. I understand that this is implemented using pointers and hence unsafe. My question is why does it have to be unsafe? Why can't C# provide arbitrary constant length arrays and keep them as a value type instead of making it a C# reference type array or unsafe buffers?

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• Gradient a Parallelogram

  - by nuclearpenguin

  I'm working in JavaScript drawing on a canvas, and have four coordinates to draw a parallelogram, called A, B, C, and D starting from the top-left, top-right, bottom-left, and bottom right, respectively. An example of some coordinates might be: A: (3, 3) B: (4, 3) C: (1, 0) D: (2, 0) I can draw the parallelogram just fine, but I would like to fill it in with a gradient. I want the gradient to fill in from left to right, but matching the angle of the shape. The library I use (CAKE) requires a start and stop coordinate for the gradient. My stop and start would be somewhere half way between A and C, and end somewhere half way between B and D. Of course, it is not simply EXACTLY half way because the angles at A, B, C, and D are not right angles. So given this information (the coordinates), how to I find the point on the line A - C to start, and the point on the line B - D to stop? Remember, I'm doing this in JavaScript, so I have some good Math tools at my disposal for calculation.

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• Unkillable console windows

  - by rep_movsd

  I'm developing an OpenGL based 2d simulation with GLUT under Visual C++ 2008, sometimes when I have an assert() or unhandled exception and break into the debugger, the GLUT display window closes, but the console window remains open.They just cant be killed!!! They do not show up with Task manager, Process Explorer or any other tool, I cannot find the window handle using the Spy++ tool either. Worst thing is they prevent my system (Windows XP) from shutting down, I have to manually poweroff (and of course I have to run chkdsk on my drives and invariably it finds and fixes minor errors after bad shutdowns) Has anyone come across such an issue?

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• Can Entity Framework be used for the purpose of entity/schema definition at application runtime?

  - by Kabeer

  Hello. Can 'Entity Framework' be used for the purpose of entity definition at application runtime? Ok, to make it simple, here is what I want to achieve: My application is a product. I should be able to define entities at runtime on the basis of inputs gathered from an 'authoring' user (in effect this means 'model first' approach). These entities are of course persistable. Further, after having defined the entities and their relationships, I should be able to make complex queries across them for many reasons, including reports. Is the above possible and how? So far what I have realized is that there is a dependency on Visual Studio.

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• How to get the quickfix timestamp?

  - by yves Baumes

  I've seen in quickfix doxygen documentation that it generates an utc timestamp as soon as it has received a FIX message from a socket file. Have a look in ThreadedSocketConnection::processStream(), it calls then m_pSession->next( msg, UtcTimeStamp() ); I would like to get that timestamp, because I need it to screen network and QuickFix lib latencies. I didn't find a way to get it from FixApplication::fromApp() callback or 'Log::onIncoming()' callback. As I am newbie with quickfix I would like to know if I missed something in the Quickfix documentation. Did anybody ever done that before? Of course there is other solutions, but for homogeneity with others market acces applications I maintain, I would prefer to avoid them. For instance, I would prefer not to modify QuickFix code source. And I would like to avoid re-write the application logic that quickfix provide me, quickfix helpping me only for message decoding.

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• Make SQL Server 2005 accessible via Internet

  - by Gary Joynes

  I have an application that runs on a client's server built on a SQL Server 2005 database. We have now developed an ASP.NET v2 application which connects to this database. This web application will be hosted on an ISP's server but needs to access the SQL Server database on the client's server. The client's server has a firewall and so forth so I assume it should be possible to make the SQL Server accessible via the Internet but of course I am woriied about security. Can someone point me to some best practices to achieve this.

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