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• Enabling/disabling proftpd accounts with PHP and WHM

  - by Brett G

  I have a VPS with WHM/CPanel which is being used just by me. It's utilizing proftpd. I'd like to, via a PHP script, disable/enable a specific FTP account. I've done this by having PHP call a bash script which removes/adds the user account line to /etc/proftpd/USERNAME password file. However, in order to do this I have to give other write rights to /etc/proftpd/USERNAME. This isn't ideal, and I'd be willing to do it another way. It also seems like WHM is automatically resetting these permissions on a regular basis. Does anybody have any ideas on a better way to deal with this?

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• Shader inputs in a general purpouse engine

  - by dreta

  I'm not familiar with SDKs like Unity or UDK that much, so i can't check this off hand. Do general purpouse engines allow users to create custom uniform variables? The way i see it, and the way i have implemented it in an engine i'm writing to learn 3D, is that there is a "set" of uniforms provided by the engine and if you want to write a custom shader then you utilize uniforms you need to create a wanted effect. Now, the thing is, first of all i'm not an artist, second of all, i didn't have a chance to create complex scenes yet. So my question is, is it common practice to define variables that the engine provides and only allow the user to work with what they're given? Allowing users to add custom programs and use them where they want is not hard, but i have issues imagining how you'd go about doing the same for uniforms.

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• How to capture the screen in DirectX 9 to a raw bitmap in memory without using D3DXSaveSurfaceToFile

  - by cloudraven

  I know that in OpenGL I can do something like this glReadBuffer( GL_FRONT ); glReadPixels( 0, 0, _width, _height, GL_RGB, GL_UNSIGNED_BYTE, _buffer ); And its pretty fast, I get the raw bitmap in _buffer. When I try to do this in DirectX. Assuming that I have a D3DDevice object I can do something like this if (SUCCEEDED(D3DDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pBackbuffer))) { HResult hr = D3DXSaveSurfaceToFileA(filename, D3DXIFF_BMP, pBackbuffer, NULL, NULL); But D3DXSaveSurfaceToFile is pretty slow, and I don't need to write the capture to disk anyway, so I was wondering if there was a faster way to do this

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• How to save one role implementing a client/server pattern in Azure?

  - by Alfredo Delsors

  Sometimes you need to have an instance performing a server role when other instances are playing the client role. An example can be a file sharing like in this great post: http://blogs.msdn.com/b/mariok/archive/2011/02/11/sharing-folders-in-azure.aspx, one instance shares a folder that all other instances are using to write files that the server processes. The problem is that there is not discovering mechanism in Azure that allows one instance to know where the instance acting as a server is located. A first approach can be having a server role and a client role like in the previous post. This means more instances, more money. A solution to save this "server" role is to use Instance 0, always available, to act as a server. An instance can know that it should act as the server checking RoleEnvironment.CurrentRoleInstance.Id.EndsWith(".0"). Other instances can iterate the RoleEnvironment Instances collection to find the instance whose name ends with ".0", getting its endpoints and acting as its clients.

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• Is it bad practice to use the same name for arguments and members?

  - by stijn

  Sometimes I write constructor code like class X { public: X( const int numberOfThingsToDo ) : numberOfThingsToDo( numberOfThingsToDo ) { } private: int numberOfThingsToDo; }; or in C# class X { public X( int numberOfThingsToDo ) { this.numberOfThingsToDo = numberOfThingsToDo; } private int numberOfThingsToDo; } I think the main reason is that when I come up with a suitable member name, I see no reason to use a different one for the argument initializing it, and since I'm also no fan of using underscores the easiest is just to pick the same name. After all it's suitable. Is this considered bad practice however? Any drawbacks (apart from shooting yourself in the foot when forgetting the this in C#)?

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• Should I use parentheses in logical statements even where not necessary?

  - by Jeff Bridgman

  Let's say I have a boolean condition a AND b OR c AND d and I'm using a language where AND has a higher order of operation precedent than OR. I could write this line of code: If (a AND b) OR (c AND d) Then ... But really, that's equivalent to: If a AND b OR c AND d Then ... Are there any arguments in for or against including the extraneous parentheses? Does practical experience suggest that it is worth including them for readability? Or is it a sign that a developer needs to really sit down and become confident in the basics of their language?

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• Vala: How to use Glades ActionGroup correctly

  - by Tom

  Could someone give me an example how to use Glade's ActionGroup with a Gtk.Builder in a Vala-Application? If I have an ActionGroup with an Action save, and on this action I've set the activate Signal to "on_save_clicked", should it be fine to write: [CCode (instance_pos = -1)] public void on_save_clicked(){ print("I would like to save, please\n"); } in global scope and then use builder.connect_signals(null)? When i do this, i just get "Could not find signal handler 'on_save_clicked'" when executing the program. No compile errors. I'm using valac --pkg gtk+-3.0 test.vala for compiling and glade-3.10.0

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• What's the normal way machine-learning algorithms are integrated into normal programs?

  - by Benjamin Pollack

  I'm currently taking a machine learning course for fun, and the course heavily focuses on Matlab/Octave to write the code. One thing mentioned in the course is that, while Matlab/Octave are great for prototyping, they're very rarely used for production algorithms. Instead, those algorithms are typically rewritten in C++/Python/etc., using appropriate libraries, before reaching customers. Fair enough; I get that. But here's my question: is that done for cultural reasons, for technical reasons, or because there is really no language that provides Matlab/Octave-like fluidity, but in a compiled form that can be linked from C/C++/$MainstreamLanguage? The game industry uses Lua for game logic because it's easy to embed, and vastly superior for expressing things like AI. Likewise, there are Prolog variants for rules-heavy applications, Scheme variants for compilers, and so on. If there's a matrix equivalent language, what is it? If there isn't, why is this field different?

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• What top companies look for in an Interview?

  - by Geek

  Basically I am looking for what is it that you goof up and you are out from the remaining process ? Are elimination rounds a fair way to judge a person ? Anyone can have a bad hour :-( Should you code the best possible or should you get the Algorithm right ? I generally first code a workable solution and then work on it till a level I think it looks beautiful to me. Is this a wrong approach ? Recently I had a telephonic interview in which I was asked to write a variation of Level Order traversal in 20 minutes. I could get the Algorithm and working code in 20 minutes but couldn't get the Exception handling and the coding convention right, after which I didn't hear back from them :-( All the other questions in the interview went very well this was the only thing which was 'not upto the mark'. Needless to say I like the company and will apply again but want to get it right the next time :-) Please share your experiences and valuable suggestions.

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• How do I plot individual pixels using the XNA APIs?

  - by izb

  If I wanted to fill my game screen with individually coloured pixels, how would I do this? For example, if I wanted to write a 'game of life'-type game where each pixel was a cell, how would I achieve this using XNA? I've tried just calling SetData() on a Texture2D object using a screen-sized array of Color values, but it complains with: You may not call SetData on a resource while it is actively set on the GraphicsDevice. Unset it from the device before calling SetData. How do I do as it asks? Or better still... is there an alternative, better, efficient way to fill a screen with arbitrary pixels?

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• Simplicity-efficiency tradeoff

  - by sarepta

  The CTO called to inform me of a new project and in the process told me that my code is weird. He explained that my colleagues find it difficult to understand due to the overly complex, often new concepts and technologies used, which they are not familiar with. He asked me to maintain a simple code base and to think of the others that will inherit my changes. I've put considerable time into mastering LINQ and thread-safe coding. However, others don't seem to care nor are impressed by anything other than their paycheck. Do I have to keep it simple (stupid), just because others are not familiar with best practices and efficient coding? Or should I continue to do what I find best and write code my way?

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• s expression representation for c

  - by wirrbel

  Experimenting with various lisps lately (clojure especially) i have wondered if there are any s expression based representations of (subsets) of c, so you could use lisp/closure to write macros and then convert the s-expression c tree to pure c. I am not asking for a to-c-compilers of lisp/scheme/clojure but more of using lisps to transform a c syntax tree. Little background to why i am asking this question: i find myself to really enjoy certain clojure macros like the threading macros -> doto etc. And i feel that they would be great in a non FP environment as well.

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• Family server setup [closed]

  - by Manny

  Hi all, I really hope some of you can give me some direction. I have setup a linux server at home and through samba I can access files from different computers in my home. I would like to use this server as a file-server for my family (brothers, sisters and parents who all live in their own homes). I really like the way it is set up right now with user and permission controls, but I've read that it is bad idea to open up the samba port to the world. The requirements are simple: 1) it should be easy to access, by using standard web browsers or mounting the drive (shouldn't have to use any VPN setup or use putty etc) 2) should be somewhat secure. We just want to share family pictures instead of putting them on facebook or picasa or other web server, nothing top secret. Here is what I've looked into: 1)Webdav. It seems decent but seems like it windows7 doesn't like it very much, even with digest mode authentication. User controls and permissions are not as flexible as samba (or at least to my knowledge). I really like the user and group permissions in samba, but if I could live with webdav if it worked seamlessly with windows, it should just work shouldn't it? 2) I read somewhere to stay away from ftp as it is outdated and that there are newer and better internet file-server setups? Was that a reference to webdav? I am so confused, please help... Manny

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• Sorting a REALLY BIG delimited text file in UNIX / VMS [closed]

  - by gunbuster363

  Hi everyone, I am going to sort a REALLY BIG delimited text file, say 250Mb (or a bunch of files of more or less than 250Mb) . It have 37 fields, and I need to sort it by 5 fields, for example 1st, 4th, 5th, 6th 7th fields. Under Unix / VMS, do I have a good option to do this FAST? I can write COBOL program. Now I am trying to sort them using the below command, but it already run for a long time and just not going to finished. Thank you. The command I used: time sort -t ',' -o sorted.txt +0 -1 +4 -5 +5 -6 +6 -7 +22 -23 *.DAT_gprscdr_ftpd

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• HP dv6910 laptop no longer recognizes wireless adapter, dvd drive, and one usb port. What can I do about this?

  - by Joan H.

  In the last 3 weeks, my not even 3 year old HP laptop (vista) just seems to be failing. First, one of the usb ports stopped working. Next, the dvd drive all of a sudden was not recognized as even existing, so it is now useless. And as of today, I no longer seem to have a wireless adapter on my laptop. It doesn't show up in device manager, same as the dvd drive. I can connect to the internet by ethernet cable, but not wirelessly. It worked fine last night; now it doesn't even exist! I have tried a 'hard reset' I read about on HP's forum- no help. I am not sure what else to try. I read about the USB wifi dongle in another response, but I already have maxed our my usb ports even though I have bought a USB hub since the one port failed. Plus, I'd like my laptop to just work like it's supposed to instead of being jerry rigged with usb hubs, external dvd drives, and wifi dongles etc. Any ideas?

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• Online architecture guide

  - by hunterman

  I am a newbie in gamedev, and I don't know about programmer's problems that can appear during development. So can you advice me some best practice for starting build new online multi-player game backend? I just saw reddraft server, and I think Spring library can also do some of its features. What is big difference? Do I need learn more spring or I have to use servers like reddraft or write these tools myself? I know that I need to learn hard and many - and the question is - what I should to learn now at the beginning? Thanks.

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• Handling SMS/email convergence: how does a good business app do it?

  - by Tim Cooper

  I'm writing a school administration software package, but it strikes me that many developers will face this same issue: when communicating with users, should you use email or SMS or both, and should you treat them as fundamentally equivalent channels such that any message can get sent using any media, (with long and short forms of the message template obviously) or should different business functions be specifically tailored to each of the 3? This question got kicked off "StackOverflow" for being overly general, so I'm hoping it's not too general for this site - the answers will no doubt be subjective but "you don't need to write a whole book to answer the question". I'm particularly interested in people who have direct experience of having written comparable business applications. Sub-questions: Do I treat SMS as "moderately secure" and email as less secure? (I'm thinking about booking tokens for parent/teacher nights, permission slips for excursions, absence explanation notes - so high security is not a requirement for us, although medium security is) Is it annoying for users to receive the same message on multiple channels? Should we have a unified framework that reports on delivery or lack thereof of emails and SMS's?

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• Background & Research Methods section (Writing an Article)

  - by sterz

  It is my first time writing an article on a software project. I am supposed to use ACM UbiComp paper format. I already have a structure that I should follow and there is a Background & Research Methods section after Abstract, Introduction, Related Work sections. I have browser through several articles, but some of them either dont have it, have only background section or have only research methods section. I am having hard time to find an article that has this section and moreover what I must write on here. My project is about Bluetooth location tracking and I do have the implementation and evaluation, so it is not something theoretical.

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• 1 Zettabyte Is Equal to 1 Million Petabytes

  - by Gopinath

  Geeks recently coined a new English term, Zettabyte, to measure the rapidly growing digital information footprint. So what is a Zettabyte? A Zettabyte is equal to 1 million Petabytes or 1 trillion terabytes and 1 quadrillion gigabytes. Symbol To Represent Zettabyte According to wikipedia the symbol ZB is used to represent a Zettabyte. So we can write 10 ZB to represent 10 Zettabytes. Human’s Digital Output Will be 1.2 Zettabytes By End Of 2010 Are you wondering why do we need a term to measure digital data? Tech research firm IDC has recently published a report that estimates current digital footprint created by us so far at 8 million Petabytes – the equivalent of 8,000,000,000,000 GB. This foot print is expected to pass 1.2 Zettabytes by the end of 2010. cc image credit:flickr Join us on Facebook to read all our stories right inside your Facebook news feed.

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• iPhone 3d Model format: .h file, .obj, or some other?

  - by T Reddy

  I'm beginning to write an iPhone game using OpenGL-ES and I've come across a problem with deciding what format my 3D models should be in. I've read (link escapes me at the moment) that some developers prefer the models compiled in Objective-C .h files. Still, others prefer having .obj as these are more portable (i.e., for deployment on non-iPhone platforms). Various 3D game engines seem to support many(?) formats, but I'm not going to use any of these engines as I would like to actually learn OpenGL-ES. Am I putting myself at a disadvantage here by not using a packaged engine? Thanks!

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• Writing jenkins plugin: where is the documentation?

  - by user22070

  On my current project we're using Jenkins to monitor our builds. Now they want me to write a Jenkins plugin to add some more monitoring parameters. I've taken a look at how the status monitor plugin works, and I can't figure some things out. I've tried to look for documentation for writing a plugin, but that seems to be sorely lacking. (the site only mentions how to generate the base project, and refers to a tutorial that's not that informative) What I'm trying to do is just add some options to each build, add a link, and a monitoring page. Adding to the main page is apparently done by adding the action, but I'm still trying to figure out the rest. And how it all ties in. Does anyone have any pointers, or a place where I can find some decent documentation?

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• My user can't upload files to folders owned by www-data

  - by Thomas Gautvedt

  I think I have screwed up my permissions in Ubuntu. I am using my server to run PHP. I recently ran across a problem where PHP could not create directories in the var/www-directory, so I searched around on the internet. Now PHP can write and access anything like it should, but as a user, I can't create new folders or files anymore. Right now, the permissions for folders are like this: drwxrwsr-x 2 www-data www-data [Folders] This is the permissions when I upload using sftp: -rw-rw-r-- 1 gautvedt www-data [Folders] What have I done wrong and how can I change this?

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• What web oriented language would work best with binary data?

  - by Qqwy

  I want to create a service where people can upload files. However, since file storage costs money, I want to compress the files so they take less space. I would want to write my own compression algorithm, however, PHP doesn't have good ways to handle binary data (which is needed for many compression algorithms). So I wondered, what would be a better language to create such a website in? I have knowledge of PHP (and Javascript, HTML and CSS) but no experience with other things like Ruby, Perl, Python, and other web development languages.

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• What's shell script's advantage over interpreted programming languages?

  - by Lai Yu-Hsuan

  (I'm not sure if it's a appropriate question here) Shell script, like bash, can do many things. It can call Unix programs, pipe their output, redirect I/O from/to files, control flow, check whether a file exists, etc. But a modern programming language, e.g, python and ruby, can also do these all. And their are (I think) more readable and maintainable. bash is worldwide spreaded. But many distributions have installed python interpreter, too. So what's the advantage of shell script? If I could write python, ruby or perl, is it worth to learn bash?

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• /etc/apt/apt.conf gets cleared every time I change proxy settings under settings->network->Network proxy

  - by Muriuki David

  I use a proxy server settings at work but when i get home, my network connection uses no proxy settings. every time i get home and use the proxy settings under settings-networks-Network Proxy to set to "none", the file /etc/apt/apt.conf gets cleared and the following day in the morning i have to edit the file and type in the command again, or at least copy paste from a backup file. How can i avoid this situation, its tiring, how can i make the proxy settings gui write to this file for apt-get and software center to work when i set proxy under network settings?

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