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• Application development : method to manage backgound process

  - by Simon Dubois

  I am developing an application with different behavior depending on the arguments : - "-config" starts a Gtk window to change options, start and close the daemon. - "-daemon" starts a background process that does something every X minutes. I already know how to use fork/system/exec etc... But I would like to know the main logic of such application to : - restart or refresh the daemon when configuration change. - keep only one instance of the daemon. I have red that killing the daemon to restart it is not a clean way to do. How other applications do ? (ubuntuone, weather forecast, rss feed working with notification area) Thanks for your help. PS : I don't want to create a system-wide daemon, just a user application with a background process.

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• Frame timing for GLFW versus GLUT

  - by linello

  I need a library which ensures me that the timing between frames are more constant as possible during an experiment of visual psychophics. This is usually done synchronizing the refresh rate of the screen with the main loop. For example if my monitor runs at 60Hz I would like to specify that frequency to my framework. For example if my gameloop is the following void gameloop() { // do some computation printDeltaT(); Flip buffers } I would like to have printed a constant time interval. Is it possible with GLFW?

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• Methods of ordering function definitions in code

  - by xralf

  When I work on some programming project (usually command line application in Python with many switches), I'm usually creating about 30 and more functions. Most of the functions are in one file (except some helpers that I utilize in more projects). Some of the functions are called on particular switch (like -p or --print) but many functions do some helper computations, print operations or database operations because I don't want to main functions be too large. When I have an idea for a new functionality I often put new functions randomly to the file. Should I think more about it and place it to some particular place? Are there some methods for this?

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• How do I create a curved line or filled circle or generally a circle using C++/SDL?

  - by NoobScratcher

  Hello I've been trying for ages to make a pixel circle using the putpixel function provided by SDL main website here is that function : void putpixel(int x,int y , int color , SDL_Surface* surface) { unsigned int *ptr = static_cast <unsigned int *> (surface->pixels); int offset = y * (surface->pitch/sizeof(unsigned int)); ptr[offset + x] = color; } and my question is how do I curve a line or create an circle arc of pixels or any other curved shape then a rectangle or singular pixel or line. for example here are some pictures filled pixel circle below enter link description here now my idea was too change the x and y value of the pixel position using + and - to create the curves but in practice didn't provide the correct results what my results are in this is to be able to create a circle that is made out of pixels only nothing else. thank you for anyone who takes the time to read this question thanks! :D

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• Is there a way of using HTTPS with Amazon's CloudFront CDN and CNAMEs?

  - by Metalshark

  We use Amazon's CloudFront CDN with custom CNAMEs hanging under the main domain (static1.example.com). Although we can break this uniform appearance and use the original whatever123wigglyw00.cloudfront.net URLs to utilise HTTPS, is there another way? Do Amazon or any other similar provider offer HTTPS CDN hosting? Is TLS and its selective encryption available for use somewhere (SNI: Server Name Indication)? Foot note: assuming that the answer is no, but just in the hope someone knows. EDIT: Now using Google App Engine https://developers.google.com/appengine/docs/ssl for CDN hosting with SSL support.

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• mismatch of version of libkdcraw20 and libkdcraw-data

  - by naveen jankar

  I'm using Ubuntu 12.04 LTS. When I'm installlin digiKam, I'm getting a mismatch in the versions of libkdcraw20 and libkdcraw-data wanted by it and that available in the repositories. It wants version 4.8.5-0ubuntu0.2 (or in other words that is the latest version according to synaptic) but the available one is 4.8.5-0ubuntu0.3 in both cases. Is there a work-around? Or how do I request the Ubuntu managers to rectify this? addenda On Synaptic i selected digikam to be installed. it downloaded all the dependencies but the 2 in question were not found - the message it gave "W: Failed to fetch security.ubuntu.com/ubuntu/pool/main/libk/libkdcraw/… 404 Not Found [IP: 91.189.91.13 80]". I google-searched the 2 files in the repositories to find that the version available there is ubuntu0.3 instead of ubuntu0.2.

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• Install Samba 3.0.24 on Ubuntu Server 10.04 from Source

  - by Nilpo

  Has anyone had any luck compiling and installing Samba 3.0.24 on Ubuntu 10.04? I'm trying to set up realtime virus scanning on Samba shares (ClamAV) using the legacy version of Samba as it is the latest release supported by samba-vscan-0.3.6b. I'm no expert at this but I think I have all of the dependencies covered and I'm following the documentation with the source code but I'm getting errors as if there is a problem with the source code. I downloaded the source directly from http://ftp.samba.org/pub/samba/stable/samba-3.0.24.tar.gz After running ./configure and make, I get the following error. Compiling client/mount.cifs.c client/mount.cifs.c: In function ‘main’: client/mount.cifs.c:1068: error: ‘PATH_MAX’ undeclared (first use in this function) client/mount.cifs.c:1068: error: (Each undeclared identifier is reported only once client/mount.cifs.c:1068: error: for each function it appears in.) make: *** [client/mount.cifs.o] Error 1 You can view the full output log here. Can anyone help me get this installed or suggest another means of implementing realtime virus scanning on Samba shares?

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• Does heavy JavaScript use adversely impact Googleability?

  - by A T

  I've been developing the client-side for my web-app in JavaScript. The JavaScript can communicate with my server over REST (HTTP)[JSON, XML, CSV] or RPC (XML, JSON). I'm writing writing this decoupled client in order to use the same code for both my main website and my PhoneGap mobile apps. However recently I've been worrying that writing the website with almost no static content would prevent search-engines (like Google) from indexing my web-page. I was taught about this restriction about 4 years ago, which is why I'm asking here, to see if this restriction is still in-place. Does heavy JavaScript use adversely impact Googleability?

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• How are components properly instantiated and used in XNA 4.0?

  - by Christopher Horenstein

  I am creating a simple input component to hold on to actions and key states, and a short history of the last ten or so states. The idea is that everything that is interested in input will ask this component for the latest input, and I am wondering where I should create it. I am also wondering how I should create components that are specific to my game objects - I envision them as variables, but then how do their Update/Draw methods get called? What I'm trying to ask is, what are the best practices for adding components to the proper collections? Right now I've added my input component in the main Game class that XNA creates when everything is first initialized, saying something along the lines of this.Components.Add(new InputComponent(this)), which looks a little odd to me, and I'd still want to hang onto that reference so I can ask it things. An answer to my input component's dilemma is great, but also I'm guessing there is a right way to do this in general in XNA.

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• Share links with <script src=""> SEO

  - by gansbrest

  Hi, I would like to create a share link to my website using javascript: script src="[url-to-my-script]" Basically the main idea behind this is to render HTML block with an image and link to the website. By using JavaScript approach I can control the look and feel of that link + potentially I could change the link html in the future without touching partner websites. The only potential problem I see with this approach is SEO. I'm not sure if google will be able to index that link to my website, since it's generated by javascript.

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• Primary domain in vps has been deactivated

  - by manix

  This is my scenario: I have a vps with two domains (example1.com, example2.com). When I started with this vps I set example1.com as primary domain and the nameserver were configured with the pattern ns1.example.com, ns2.example1.com. The domains were brought in name.com. Across the time, I usually only work whit the domain example2.com, for that reason I stopped to pay example1.com anual registration and just keep the example2.com. But, today my vps is unreacheable because the main domain was deactivated last ago 23th. I never imagined that it could affect my server. So, I am so worried because I don't know if rebuild the vps is the solution here because I could lost my data. Can you take me to the right direction in order to recover my vps?

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• Given a string of letters from alphabet insert frequency of each character in the string.in O(n) time and O(1) space [on hold]

  - by learner

  Below is my attempt void str_freq(char *str, int len) { char c; int cnt=0; c=str[0]; int i,j=0; for(i=0;i<len;i++) { if(c==str[i]) { cnt++; } else { c = str[i]; // printf(" %d ",cnt); str[j] = str[i-1]; str[j+1] = (char)(((int)'0')+cnt); j++; cnt=0; } } str[j+1]='\0'; printf("%s",str); } int main() { char str[] = "aaabbccccdeffgggg"; int length=strlen(str); str_freq(str,length); } I am getting wrong answer abcdef1 instead of a3b2c4d1e1f2g4. Please let me know where I am going wrong.

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• Basics of drawing in 2d with OpenGL 3 shaders

  - by davidism

  I am new to OpenGL 3 and graphics programming, and want to create some basic 2d graphics. I have the following scenario of how I might go about drawing a basic (but general) 2d rectangle. I'm not sure if this is the correct way to think about it, or, if it is, how to implement it. In my head, here's how I imagine doing it: t = make_rectangle(width, height) build general VBO, centered at 0, 0 optionally: t.set_scale(2) optionally: t.set_angle(30) t.draw_at(x, y) calculates some sort of scale/rotate/translate matrix (or matrices), passes the VBO and the matrix to a shader program Something happens to clip the world to the view visible on screen. I'm really unclear on how 4 and 5 will work. The main problem is that all the tutorials I find either: use fixed function pipeline, are for 3d, or are unclear how to do something this "simple". Can someone provide me with either a better way to think of / do this, or some concrete code detailing performing the transformations in a shader and constructing and passing the data required for this shader transformation?

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• What is the best way to pass data into an API from a website?

  - by Chris Wakoksi

  My main objective is to create a User Interface in order to provision(change the status: activate, deactivate, or suspend) modems. I have received a SOAP developer's guide to the specific type of modem that helps out with the specific values that I need to pass into Iridium's WSDL but I cannot figure out how to do this from a webpage I have created using HTML/CSS, and PHP? I have been told by others that I need to know the portal. I have no idea what that means. I am a beginner programmer who has learned programming for this project. Any suggestions as to how to pass my data into the provisioning API?

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• No Sound in HTML5 and Google Chrome after update to 13.10

  - by rechengehirn

  After upgrading to Ubuntu 13.10 i have no sound for HTML5 players in Google Chrome Browser. Firefox works. Flash Players are working. No sound on Youtube when using HTML5. No sound on vimeo (They have html5 player as standard). When I open the soundapplication, google doesn't show up when I try to play a html5 video. But it shows up, when playing a Flash Video. Google Chrome Version is: 24.0.1312.52 Installed an updated via ppa: deb http://dl.google.com/linux/chrome/deb/ stable main

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• Formula for three competing heroes, each has one they can beat and one they're beaten by

  - by Georgiadis Abraam

  I am trying to design a game for a project I have, The main idea is: 3 Types of heroes 3 Stats per hero There are no levels involved so the differences must be located on stats. Fight logic - The logic of fight is that type1hero has good chances winning type2hero, type2hero has good chances type3hero and type3hero has good chances winning type1hero. For over a week I am trying to find a stats based formula that will allow me to fix this but I can't, I was meddling with numbers yesterday and it was decent but I can't extract the formula out of it. Could you please guide me or give me hints on how should I start creating formulas on a Non lvl game that fulfills the fight logic?

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• NetBeans 7.2 RC1 is published

  - by Ondrej Brejla

  NetBeans 7.2 RC1 was today published. You can download it here. You could read about the PHP features added to the NetBeans 7.2 release here on the blog, but the main features added or improved are: Support for PHP 5.4 PHP editing: Fix Uses action, annotations support, editing of Neon and Apache Config files and more Support for Symfony2, Doctrine2 and ApiGen frameworks FTP remote synchronization Support for running PHP projects on Hudson For more information, just look at New and Noteworthy page for NetBeans 7.2. And as obvious you can help us to test the build. Just try it and if you find an issue / error, please report it. Thanks for your help.

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• How to update dependency during runtime in my .NET application?

  - by Louis Rhys

  I have a server-client application. Sometimes the server is updated which requires some DLLs in the client to be updated as well (The DLLs are the dependencies of the main executable). For now, we have to close the client, manually deploy the DLLs, and then start the client again. This is kind of an inconvenience because the client is an automated application, so normally it doesn't need any user intervention. Is it possible for this to be done automatically without restart or user intervention? Like, the client would download the latest DLL, and replace the current one?

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• Multithreading for a mixed-genre game in Python?

  - by arrogantc

  So here's the situation. I'm making a game that mixes two genres; arcade shooter and puzzler. They don't intertwine TOO much; all the interaction that really goes on is that every time an enemy is destroyed, a block is created. The blocks aren't even a part of the main collision detection system; they have their own more suited to their needs. What I want to ask is this; might it be a good idea to have the arcade shooter portion run on one thread, and the puzzle game portion run on another?

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• Upgrade Ubuntu 11.10 to 12.10

  - by Daniel Minassian

  To whoever can help, I want to update the ubuntu on my laptop to 12.10 from the current version 11.10, when i click on the update manager i get a partial update gui, if i click cancel on that i get the gui for update which has three buttons check, install updates and upgrade. The upgrade button upgrades only to 12.04.1.LTS, when i press check it checks and gives me this error "W:Failed to fetch h t t p://lb.archive.ubuntu.com/ubuntu/dists/precise/main/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_main_i18n_Index , W:Failed to fetch h t t p://lb.archive.ubuntu.com/ubuntu/dists/precise/multiverse/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_multiverse_i18n_Index , W:Failed to fetch http://lb.archive.ubuntu.com/ubuntu/dists/precise/restricted/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_restricted_i18n_Index , W:Failed to fetch http://lb.archive.ubuntu.com/ubuntu/dists/precise/universe/i18n/Index No Hash entry in Release file /var/lib/apt/lists/partial/lb.archive.ubuntu.com_ubuntu_dists_precise_universe_i18n_Index , E:Some index files failed to download. They have been ignored, or old ones used instead." Thank you for your time and help, Daniel Minassian

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• How can I alias domains to subdomains?

  - by user745668

  I have a main site with a bunch of subdomains created. Each subdomain is a blog and I want each blog to have its own domain name i.e. thisguy.com - blog1.mainsite.com thatguy.com - blog2.mainsite.com I bought the new domains and I set up the CNAME records as above to alias them to the appropriate subdomains. However, I get my hosts "a domain is pointing to one of our servers but we don't know anything about it" landing page. How can I set up these domains as aliases of my subdomains?

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• SEO: Is there a limit to how long titles/descriptions should be?

  - by jiewmeng

  I am trying to fill up title and meta description for my Tumblr blog. The way I will do that is via the themes. For the title, it isn't too much of an issue, I can just get the title for the post although some post types do not have titles. The main question is about the description. I am thinking of using the start of the body content. For now, there is no way to limit the length of body content. I wonder if its OK to have the whole body in the description? I have contacted Tumblr support to suggest that they have a way of creating limiting text length in their template tags.

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• RPC protocols comparison

  - by Ricardo

  I have to select a protocol/technology to use for communicating a client-server architecture, with support both for Python and C. The main requirements are: Symmetrical communication in between ends: clients establish a connection and servers can send data back to clients through the same connection. Avoid excessive overhead by using HTTP or a big stack (if possible, TCP direct communication). TLS/SSL support for secure communications. Ease of implementation. For that, I evaluated the following protocols/communications technologies. Is the information on this table accurate and correct? (*1) TLS support for RPyC is based in a no-longer supported Python library.

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• how can i fix this problem with mount volume in ubuntu 10.10?

  - by Ali Unlu

  I have two operating system: ubuntu 10.10 and windows 7 ultimate. I trisected my HDD.One of these is for main Windows files,one of this for ubuntu system and the last drive which must be accessible on both of two system is for common files (musics, films, etc). This last partition is J: in Windows. Unfortunately when I was setting up ubuntu 10.10 while disk partition, I forgot mount my J drive as /windows and accidentally mounted it as swap . Then, I tried to do this visible in ubuntu.But I couldn't myself. Device : /dev/sda4 and whenever I try to do this I always get this error : Error mounting: mount exited with exit code 1: helper failed with: mount: according to mtab, none is already mounted on none mount failed

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• Best Option for Creating A Small Church Website

  - by Jim

  I've been asked to create a website for a small church. Their prior site was hosted on geocities which is no longer. They are not looking for anything robust, just an informational site with a calendar and maybe a contact form. The church would also like to be able to administer the site with little technical know-how. Cost is also an issue. Given these requirements, something like sites.google.com seems like a good option. However, my main concern is that Sites will suffer the same fate as geocities. It is definitely not a flagship Google product. Are there other good alternatives that fit the requirements?

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