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• What do I need to write a small game on Linux?

  - by Michas

  I want to make a simple game: 2d, single-player, without tons of animations and special effects. I am not interested in ready to use game engines, I want to learn to write some code in a quite universal language. I am using Linux (AMD64) and looking for something easy with nice library for games. I do not want to mix few languages, most of them are in fact fast enough themselves for my needs. Cross platform would be an advantage, however all I need is a good Linux support. I have been considering few solutions. Ruby + Language looks very nice. + I am going to learn Ruby. - I am afraid I can have problems with additional libraries. - This thread about game libraries for Ruby could be longer. SDL + C + It is used for games. + It is very easy to set up. + There is a lot of additional libraries. + It is cross-platform. - The solution is quite low level. - The language is sometimes quite hard to read. QT + C++ + It is very easy to set up. + The standard QT libraries supports everything I can possibly need. + It is cross-platform. + The documentation is good. - The compilation is slow. - The language looks horrible. - The size of standard QT libraries is too big to comprehend. Environment of web browser + I am going to learn something more about this environment. + It is somewhat used for games. + It is quite cross-platform. - It would be too much experimental. Java + It is used for games. + The standard Java libraries supports everything I can possibly need. + It is cross-platform. - It is quite hard to set up. - The size of standard Java libraries is too big to comprehend. - The source code in Java could look better. - I think I do not want to learn Java. Google Go + I am going to learn Google Go. - There is big problem with libraries. - The solution would be quite low level. Python + It looks some people do games in Python, according to this thread. + It looks there are probably more libraries than for Ruby. - The Ruby language looks better. - I think I do not want to learn Python. C++ + something else + It is used for games. + It would be probably cross-platform. + There is a lot of libraries. - I do not need C++ extensions over C. - Compilation could be slow, there are fast compilers for C, not for C++. Haskell + I am going to learn Haskell. - Many things about programming computer games looks too much imperative. - It looks I can have some problems with libraries. - Compilation (GHC) looks slow. There is probably something more to consider. Does anyone have experience in making small games for Linux in non mainstream solutions? Does anyone have an advice for me?

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• faster ( squid + apache httpd + apache tomcat )

  - by letronje

  We have a production setup where we have Squid in the front(caching images, js, css, etc) Apache httpd in the middle(prefork + mod_rewrite + mod_jk/AJP + mod_deflate + mod_php(few php pages)) Apache tomcat 5.5 at the end serving all the dynamic stuff. What would be the best way to reduce the overhead of having 3 servers in the request path ? Wondering if replacing httpd with a faster web server like nginx/lighttpd will help. httpd right now does the job of url rewriting(for clean urls) and talking to tomcat(via mod_jk) and compressing output(mod_deflate) and serving some low traffic php pages. What would be ideal replacement for httpd given that we need these features? Is there a way to replace (squid + apache) with a single entity that does caching well (like squid) for static stuff, rewrites url, compresses response and forwards dynamic stuff directly to tomcat ? heard abt varnish cache, wondering if it can help.

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• Hosting a VST/DX instrument in C#/C++?

  - by James D

  I'm trying to get a read on the effort level involved in building a barebones virtual instrument host in C++ or C# but I haven't been able to get any hard information. Does anybody know any good starter apps, tutorials, helper libraries for this sort of thing? If it matters, the goal would be to a) accept incoming MIDI events and b) dispatch them to the virtual instrument. In C++ or C#, if possible. Thanks!

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• LAMP - Tool to create Layered PDF in PHP..

  - by pravinp

  Hi Do anyone know Good and CHEAPER tool we can use to create layered PDF in LAMP? i came to know about PDFLib+PDI8 but thats €1590... but i am looking for cheaper option.. but must be same level to that PDFLib+pdi8. Thanks in advance Pravin P

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• throws SecurityException when signing with the default debug keystore

  - by Omer

  I am receiving a SecurityException since yesterday when I launch the service using signature protection level for permission with the default debug keystore. The strange thing is I wasn't receiving this error before yesterday and I didn't make any security related change. On the other hand, my own keystore using for releases is still working good. Related AndroidManifest.xml part: <permission android:name="com.my.app.privateservices" android:protectionLevel="signature" /> <service android:name=".MyService" android:permission="com.my.app.privateservices" />

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• Radeon hd 6570 black screen

  - by Sho

  I got some problem with new graphic card. Every time I use AMD Catalyst drivers on Windows or Linux, screen repeatedly goes black. This usually shows u when i open new cards in a browser, resize a window or run a program. Card runs smoothly on basic drivers but this means low resolution. 1940x1080 is native for my monitor so it causes a lot of problems. I've got a 600W Deus G1, so the power is not the problem. Maybe its a silly question, but would going form a vga cable to hdmi help to improve this situation? If not, can it be caused by slow processor or old mainboard? Im getting kinda confused about this whole thing...

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• Understanding VS2010 C# parallel profiling results

  - by Haggai

  I have a program with many independent computations so I decided to parallelize it. I use Parallel.For/Each. The results were okay for a dual-core machine - CPU utilization of about 80%-90% most of the time. However, with a dual Xeon machine (i.e. 8 cores) I get only about 30%-40% CPU utilization, although the program spends quite a lot of time (sometimes more than 10 seconds) on the parallel sections, and I see it employs about 20-30 more threads in those sections compared to serial sections. Each thread takes more than 1 second to complete, so I see no reason for them to work in parallel - unless there is a synchronization problem. I used the built-in profiler of VS2010, and the results are strange. Even though I use locks only in one place, the profiler reports that about 85% of the program's time is spent on synchronization (also 5-7% sleep, 5-7% execution, under 1% IO). The locked code is only a cache (a dictionary) get/add: bool esn_found; lock (lock_load_esn) esn_found = cache.TryGetValue(st, out esn); if(!esn_found) { esn = pData.esa_inv_idx.esa[term_idx]; esn.populate(pData.esa_inv_idx.datafile); lock (lock_load_esn) { if (!cache.ContainsKey(st)) cache.Add(st, esn); } } lock_load_esn is a static member of the class of type Object. esn.populate reads from a file using a separate StreamReader for each thread. However, when I press the Synchronization button to see what causes the most delay, I see that the profiler reports lines which are function entrance lines, and doesn't report the locked sections themselves. It doesn't even report the function that contains the above code (reminder - the only lock in the program) as part of the blocking profile with noise level 2%. With noise level at 0% it reports all the functions of the program, which I don't understand why they count as blocking synchronizations. So my question is - what is going on here? How can it be that 85% of the time is spent on synchronization? How do I find out what really is the problem with the parallel sections of my program? Thanks.

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• How to send broadcast message using c# application

  - by Udayanga Gamage

  hi, I have some C# form application.I'm using some central data base which is developed on SQLServer2005.According to my application there are several user levels such as admin,reception,... problem There is a requirement that if someone has changed the database(eg: add new record/delete record) that will be noticed admin and higher level of user. What will be the way that should I follow to achieve this task! Thank in advance!

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• flex coverflow adding links to the images

  - by nivcaner

  Hi, I'm using sebastiaan holtrop's cover flow component in Flex. I would like to be able to add the sources to the images using xml. I would also like each image to have its own URL assosiated with it, so when I click it (if it's in the front of the coverflow), I go to that URL. I'm a bit clueless as to how to get that done (this is the first time I use Flex and the project docs think I'm a higher level Flex programmer...). Thanks, Niv

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• Node.js or Erlang

  - by gotts

  I really like these tools when it comes to the concurrency level it can handle. Erlang looks like much more stable solution but requires much more learning and a lot of diving into functional language paradigm. And it looks like Erlang makes it much better when it comes to multi cores CPUs(fix me if I'm wrong). But which should I choose? Which one is better in the short/long term perspective?

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• Get the name of the currently executing method in Ruby

  - by salt.racer

  So $0 is the env variable for the top level Ruby program ... but is there one for the current method?

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• NHibernate: inserting additional calculated column

  - by Andrey Shchekin

  What would be your approach with NHibernate to do the following: When Comment is inserted into DB, and its property Text is inserted into column Text (due to a mapping), insert into column TextHash a hash of this property value. It seems trivial if I map TextHash, but how should I do this without mapping it? I do not need it in the domain model, its a DB-level optimization (I would use computed HashBytes if not for the length limit).

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• MacPro 1,1 video's card

  - by alexus

  I just bought a Mac Pro 1,1 from my coworkers and I'm looking to upgrade video card as the one inside is very noisy. What are my options? Basically I'm not looking to spend a lot of money, in fact i'd rather to spend as little as possible and get low end or mid range card, I'm not really playing games all that much so pretty much anything will do, I'd prefer 2xx series though. Current Mac Pro sells w/ GT120, Apple sells upgrade kit for $149 (which is okay, I just not sure if I'll be able to use this card on such an old Mac Pro)

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• How to make emacs properly indent if-then-else construct in elisp

  - by Mad Wombat

  When I indent if-then-else construct in emacs lisp, the else block doesn't indent properly. What I get is: (defun swank-clojure-decygwinify (path) "Convert path from CYGWIN UNIX style to Windows style" (if (swank-clojure-cygwin) (replace-regexp-in-string "\n" "" (shell-command-to-string (concat "cygpath -w " path))) (path))) where else form is not indented at the same level as the then form. Is there an obvious way to fix this?

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• Which is generally considered faster or best practice: symlinks or Apache aliases?

  - by Christopher W. Allen-Poole

  I'm curious as to what most people's views are on this subject. Personally, I will almost always prefer symlinks unless I have no other option -- I find that it is far more obvious when someone is navigating the file system, but, on the other hand aliasing is more platform independent. Windows XP, for example, doesn't have anything remotely comparable to symlinks (NTFS junctions are not interpreted correctly by at least some environments), which means that anything which relies on symlinks in a *nix based system cannot be transferred. (I know that Windows 64x OS's have symlinks, but I've not seen if they can be read correctly by the environments previously mentioned) In addition to this, I was also wondering which is considered faster. Is this even possible to know? Do you have a conjecture? I would imagine that since symlinks are generally more low-level than Apache it would make sense that they would be referenced faster, but, on the other hand, I would guess that Apache is required to do a lookup in either case so it would be disk read dependent.

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• Transferring websites from x64 to x86 server

  - by Ke

  Hi, I run a x64 staging server here along with the following: Solr Java etc. However, I am about to get a linode vps for production and quickly realising that x86 is the way to go for their lowest RAM package (thinking to upgrade later). My staging server is x64 with 12gb ram, so going down to 300mb ram is going to feel devilishly slow ;/ Here are my questions: 1) Will I have problems transferring my scripts, dbs etc from a x64 to x86 server? e.g. solr indexes 2) Is it worth going for the x86 package? I am probably going to upgrade later down the line and x64 might be better for the servers with more RAM? should I stick with x64 instead as there isnt much difference when using with low RAM? Cheers Ke

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• Learning to write organized and modular programs

  - by Peter

  I'm a computer science student, and I'm just starting to write relatively larger programs for my coursework (between 750 - 1500 lines). Up until now, it's been possible to get by with any reasonable level of modularization and object oriented design. However, now that I'm writing more complex code for my assignments I'd like to learn to write better code. Can anyone point me in the direction of some resources for learning about what sort of things to look for when designing your program's architecture so that you can make it as modularized as possible?

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• Office 365 E3 with Exchange Hosted Encryption (EHE)

  - by Stephen

  I hope this is the right forum for posting this question. I have a client who wants to move to Office 365. They are currently running on a trial of Office 365 E3 plan. My staff are now also using Office 365 E3 via the internal use licences provided as part of the MS Cloud Partner benefits. We've search high and low, spoken to about 15 different people at Office 365 Support, as well as my local distributor's MS Product Manager, but we cannot seem to find out exactly how to purchase/subscribe to the Exchange Hosted Encryption (EHE) service, or how to configure/use it from Office 365. Does anybody out there have any insight into how we can setup and use the EHE service? Thanks! Stephen

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• Free DNS software with failover support?

  - by Lin

  I'm looking for DNS software that can accomplish the following: Check health of all A records at set intervals If server is unresponsive after multiple successive checks, replace A record with a working server When a server is down, check it periodically. Once it's up, restore normal A records Here's an equivalent I thought of: Run DNS servers with very low TTL (minutes) Use a cron job to periodically query all webservers Use sed to replace A records if need be, and then restart DNS server I have a hard time believing there isn't already something that can accomplish the above. I'm not looking for a paid service, and I'm restricted to anything I can run with root access to a VPS. Any suggestions would be great. Thanks!

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• Tool to validate HTTP responses?

  - by Earlz

  Hello, I'm going to be messing with some stuff at the raw HTTP level during the next few days and I'd like to make sure I'm following the standard as close as possible. Are there any tools out there to validate the HTTP responses that my server puts out to make sure they conform to the specification?

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• Ctrl key is broken on HP Envy is broken, where can I find a replacement

  - by NewProger

  I work as a developer so I have to use key combinations a lot. And I have HP Envy laptop. And the Ctrl key is broken for the second time. First time I just took one from my friend. But I don't have any more friends who are willing to sacrifice their Ctrl key Anyone know where I can find one? (or rather a bunch because they are so weak and low quality) I tried to contact HP support but they did everything to prevent people from doing it. And it is impossible to reach HP support. And in my case where warranty is expired it is not possible at all according to their rules. Also I tried Googling but found nothing

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• SQL Server cluster performance baseline

  - by Dwight T

  Currently I'm tasked with getting a good performance baseline on a SQL 2005 cluster. The main db on the server is for Sharepoint, but I would like to add other dbs on the cluster. I do have access to Quest's Performance Analysis tool to help. What are key factors to look at to see if the cluster can handle additional dbs? Do you look at different performance indicators for a cluster vs a stand alone sql server? One db will be a low usage transactional db and a read only db that is used for sales data. Thanks Dwight

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• Does URL Shortening affect Page Ranking?

  - by rc

  Recently there has been a lot of hype about URL Shortening. I guess some URL Shortening services even offer tracking stats. But, doesn't adding one more level of look-up to the original URL affect page ranking in any way? Just curious to know.

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• LaTeX not compiling properly

  - by celenius

  I'm using TeXshop, Natbib, Hyperef and two-column layout, and I am getting the following message: \pdfendlink ended up in different nesting level than \pdfstartlink which prevents LaTeX from compiling. I've searched online for solutions, but most of them are from a few years back, and I don't understand them. Is there anything I should be doing to prevent this error? It appears to be happening due to where the pagebreaks are occurring. Examples of solutions 1, 2

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• How can i solve "An explicit value for the identity column in table"?

  - by Phsika

  if i try to add some data into my table error occurs: Error:Msg 8101, Level 16, State 1, Line 1 An explicit value for the identity column in table 'ENG_PREP' can only be specified when a column list is used and IDENTITY_INSERT is ON. insert into ENG_PREP VALUES('572012-01-1,572012-01-2,572012-01-3,572013-01-1,572013-01-2', '', '500', '', 'A320 P.001-A', 'Removal of the LH Wing Safety Rope', '', '', '', '0', '', 'AF', '12-00-00-081-001', '', '', '', '', '', '', '' )

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