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  • QR code - where can I find (free) code to embed my own generator on a web page?

    - by Robbert Huisman
    Hi, couldn't find it exactly from earlier questions, but I am probably repeating an earlier question, so apologies upfront ;-) I am looking for a simple code to embed a QR 2D code generator on a website I am building. I assume their should be some free open source code for that but I could only find paid software. Can anyone point me in the right direction? would be mostly appreciated! best regards, Robbert

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  • OpenGL 2D editor ?

    - by Fevos
    I want to draw different 2D objects in OpenGL for example a path/Road ,is there any program i could draw them using a GUI then transfer them to points so i could use them in my program ?

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  • How to create 2D jagged array

    - by Ram
    In my code an array is declared as follows private Object[,] cellInfos = new Object[20, 10]; I need to convert it into Jagged array so I wrote following code private Object[][] cellInfos = { new Object[20], new Object[10] }; But it gave me a array with 2 items each of type array. I need to create 2D array where new Object[20] would be first column and new Object[10] would be the second one. Thanks.

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  • Android java assigning 2d array to 3d array

    - by semajhan
    I'm running into problems trying to assign a 2d array to a 3d array, so I thought i'd ask a question about 3d and 2d arrays. Say I have a masterArray[][][] and wanted to put childArray1[][] and childArray2[][] into it. This is how I have done it and was wondering if that is the correct way of applying it: private int[][][] masterArray; private int[][] childArray1 = { {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 0, 0, 1, 0, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 0, 1, 1, 1, 1, 1, 1, 0, 1}, {1, 0, 1, 1, 1, 1, 0, 1, 0, 1}, {1, 0, 1, 1, 0, 1, 0, 1, 0, 1}, {1, 0, 1, 1, 0, 1, 1, 1, 0, 1}, {1, 0, 1, 1, 1, 1, 1, 1, 0, 1}, {1, 0, 1, 1, 0, 1, 1, 1, 0, 1}, {1, 0, 1, 1, 0, 1, 8, 1, 0, 1}, {1, 0, 7, 1, 1, 1, 0, 1, 0, 1}, {1, 0, 1, 1, 1, 1, 0, 1, 0, 1}, {1, 0, 1, 1, 1, 1, 1, 1, 0, 1}, {1, 0, 0, 0, 0, 0, 0, 9, 0, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1} }; private int[][] childArray2 = { {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {0, 0, 0, 0, 0, 0, 0, 0, 1, 1}, {1, 1, 1, 1, 7, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 0, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 0, 0, 0, 1, 1, 1}, {1, 1, 1, 9, 1, 1, 8, 0, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}, }; Ok, so in my init method I use these some methods to set the child arrays into the master array. What I was curious about was how this exactly works. I assumed the following: masterLevel = new int[MAX_LEVELS][MAP_WIDTH][MAP_HEIGHT]; for (int x = 0; x < MAP_WIDTH; x++) { for (int y = 0; y < MAP_HEIGHT; y++) { masterArray[currentLevel][x][y] = childArray1[x][y]; } } Would that work? In my application things aren't working so I picking out code that I am not 100% sure on.

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  • calling a different python interpreter from bash command line

    - by Dennis Daniels
    I have python 2.7 installed [user@localhost google_appengine]$ python Python 2.7 (r27:82500, Sep 16 2010, 18:03:06) [GCC 4.5.1 20100907 (Red Hat 4.5.1-3)] on linux2 Type "help", "copyright", "credits" or "license" for more information. I want to use the python 2.5.2 that is in this directory [user@localhost Downloads]$ ls |grep "Python-2*" Python-2.5.2 Python-2.5.2.tgz to run a python script in Khan Academy platform against a google app engine application sudo python sample_data.py -a ~/workspace/GAE/google_appengine/appcfg.py upload Currently, when running the last script 2.7 python complains a lot (Google App Engine runs on 2.5.2 mostly and 2.6 almost) I would like to do something like sudo python env set ~/Downloads/Python-2.5.2 sample_data.py -a ~/workspace/GAE/google_appengine/appcfg.py upload Is this possible? If yes, please point the way. If not, please suggest a way to call python2.5.2 WITHOUT having to uninstall python 2.7 many many thanks Dennis

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  • Apache MaxClients doubt

    - by Milan Babuškov
    I have a busy Apache server serving only dynamic PHP+MySQL pages. It is a prefork Apache, version 2.2.4 with following config: KeepAlive off StartServers 8 MinSpareServers 32 MaxSpareServers 64 ServerLimit 512 MaxClients 512 MaxRequestsPerChild 4000 MaxClients/ServerLimit used to be set to 256, but I got the following error in error_log so I increased it: [error] server reached MaxClients setting, consider raising the MaxClients setting It seems to work now, but I have a doubt. Looking at MySQL log of queries, I have a couple hundred clients per seconds, but "ps ax" only shows 8, 9 or 10 processes running: [root@engine ~]# ps ax | grep http | wc -l 10 I even got this many processes when the above error message was shown in error_log. This made me investigate further. When I run netstat -a, I get something like this: tcp 0 0 engine:http adsl-105-143.teol.net:21453 TIME_WAIT tcp 0 0 engine:http 118-36.static.kds:mck-ivpip TIME_WAIT tcp 0 0 engine:http 118-36.static:oce-snmp-trap TIME_WAIT tcp 0 0 engine:http 118-36.static.kd:unifyadmin TIME_WAIT tcp 0 0 engine:http cable-188-2-25-29.dyna:4906 TIME_WAIT tcp 0 0 engine:http adsl-105-143.teol.net:21458 TIME_WAIT tcp 0 0 engine:http 109-92-83-91.dynamic.:62821 TIME_WAIT tcp 0 0 engine:http cable-89-216-142-192.:63576 TIME_WAIT tcp 0 0 engine:http 109-92-83-91.dynamic.:62819 TIME_WAIT tcp 1081 0 engine:http pttnetadsl38-36.ptt.r:50496 ESTABLISHED tcp 0 0 engine:http cable-188-2-36-196.dyn:4136 TIME_WAIT tcp 0 0 engine:http cable-89-216-142-192.:63580 TIME_WAIT tcp 0 0 engine:http cable-89-216-142-192.:63581 TIME_WAIT etc. When counting those, I get: [root@engine ~]# netstat -a | grep http | wc -l 431 Can anyone tell me what is really going on here and how to make sure my server keeps working, because I only use 50% of available RAM in machine?

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  • Web application/ site service (like Google App Engine) for PHP/ MySQL and Postgres

    - by Simon
    I would like to find a service similar to Google App Engine for PHP/ MySQL/ Postgres sites/ applications. We host two different types of site. i). PHP/ Mysql/ Zend Framework <VirtualHost *:80> DocumentRoot "/home/websites/website.com/public" ServerName website.com # This should be omitted in the production environment SetEnv APPLICATION_ENV development <Directory "/home/websites/website.com/public"> Options Indexes MultiViews FollowSymLinks AllowOverride All Order allow,deny Allow from all RewriteEngine On RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ index.php [NC,L] </Directory> </VirtualHost> ii). Matrix CMS - PHP/ Postgres + loads of pear classes <VirtualHost *:80> ServerName server.example.com DocumentRoot /home/websites/mysource_matrix/core/web Options -Indexes FollowSymLinks <Directory /home/websites/mysource_matrix> Order deny,allow Deny from all </Directory> <DirectoryMatch "^/home/websites/mysource_matrix/(core/(web|lib)|data/public|fudge)"> Order allow,deny Allow from all </DirectoryMatch> <DirectoryMatch "^/home/websites/mysource_matrix/data/public/assets"> php_flag engine off </DirectoryMatch> <FilesMatch "\.inc$"> Order allow,deny Deny from all </FilesMatch> <LocationMatch "/(CVS|\.FFV)/"> Order allow,deny Deny from all </LocationMatch> Alias /__fudge /home/websites/mysource_matrix/fudge Alias /__data /home/websites/mysource_matrix/data/public Alias /__lib /home/websites/mysource_matrix/core/lib Alias / /home/websites/mysource_matrix/core/web/index.php/ </VirtualHost> My key requirements are: I don't want to worry/ know/ care about the server/ infrastructure Secure/ up to date software/ os Good monitoring Automatic scalability SLA I apologise for the length of the question. In short all I want to do is i). create vhost, ii). create db iii). install app/ site iv). relax. Thanks. Edit: I include the Matrix vhost because that is the only complication that I cannot really do via a .htaccess file.

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  • Sun Grid Engine : jobs are not well balanced

    - by GlinesMome
    I use Open Grid Scheduler (a fork/copy of Sun Grid Engine). I have tried this configuration from master: # qconf -mattr exechost complex_values slots=8 slave2 # qconf -mq all.q | grep slots slots 100,[slave1=1],[slave2=8] slave1 is down, then I run 10 qsub with a sleep example (so no CPU consumption) but only 4 jobs are run at the same time on slave2 instead of I have put 8 slots. What does I missed ? PS: my goal is to provide infinite slots to force SGE to schedule only via consummable ressources.

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  • 2D animations for Android, IOS, web

    - by David Phillips
    Working on Windows 7 platform, I'm interested in creating an app that could run on Android devices (phone or tablet), IOS devices (iPhone, iPad), and the web. First target would be Android. Do you remember those old Arthur Murray footstep diagrams to teach dancing? I want to do the same thing, but animate the steps, so the user can play them all, as well as step forward or backward thru them at their own pace. Perhaps one could generate an animated GIF and then play it on the platform. So there would seem to be two parts to this: 1) A good way to generate the animation images. I can, for example, see using SketchUp - something I know - for this. But is there something better it would be worth investing in? And, 2) How to play the result, including options for playback speed control, and even forward/backward stepping? Ideally a single, or easily adaptable player to the three different OS platforms.

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  • My Apache access log contains weird GET and POST requests, what can I do?

    - by Konstantin
    My Apache access log contains weird GET and POST requests, is it possible to examine which of these are harmful? For example: 114.232.151.185 - - [11/Jun/2014:20:11:33 +0200] "GET http://hotel.qunar.com/render/hoteldiv.jsp?&__jscallback=XQScript_4 HTTP/1.1" 404 1167 103.30.175.10 - - [12/Jun/2014:08:35:17 +0200] "GET /vtigercrm/ HTTP/1.1" 404 1034 69.174.245.163 - - [14/Jun/2014:01:22:38 +0200] "GET /w00tw00t.at.blackhats.romanian.anti-sec:) HTTP/1.1" 404 1034 69.174.245.163 - - [14/Jun/2014:01:22:38 +0200] "GET /phpMyAdmin/scripts/setup.php HTTP/1.1" 404 1034 94.74.229.110 - - [16/Jun/2014:18:46:43 +0200] "GET http://www.msftncsi.com/ncsi.txt HTTP/1.1" 404 1037 80.73.11.164 - - [20/Jun/2014:01:52:14 +0200] "POST /cgi-bin/php?%2D%64+%61%6C%6C%6F%77%5F%75%72%6C%5F%69%6E%63%6C%75%64%65%3D%6F%6E+%2D%64+%73%61%66%65%5F%6D%6F%64%65%3D%6F%66%66+%2D%64+%73%75%68%6F%73%69%6E%2E%73%69%6D%75%6C%61%74%69%6F%6E%3D%6F%6E+%2D%64+%64%69%73%61%62%6C%65%5F%66%75%6E%63%74%69%6F%6E%73%3D%22%22+%2D%64+%6F%70%65%6E%5F%62%61%73%65%64%69%72%3D%6E%6F%6E%65+%2D%64+%61%75%74%6F%5F%70%72%65%70%65%6E%64%5F%66%69%6C%65%3D%70%68%70%3A%2F%2F%69%6E%70%75%74+%2D%64+%63%67%69%2E%66%6F%72%63%65%5F%72%65%64%69%72%65%63%74%3D%30+%2D%64+%63%67%69%2E%72%65%64%69%72%65%63%74%5F%73%74%61%74%75%73%5F%65%6E%76%3D%30+%2D%6E HTTP/1.1" 404 1034 162.253.66.76 - - [24/Jun/2014:23:54:30 +0200] "GET /rutorrent HTTP/1.1" 400 226 122.226.223.69 - - [25/Jun/2014:01:14:27 +0200] "GET http://todd0738.gotoip4.com//hello.html HTTP/1.1" 404 1041 My Apache access log file: http://pastebin.com/2x0naQBK

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  • Demantra 7.3.1.3 Controlling MDP_MATRIX Combinations Assigned to Forecasting Tasks Using TargetTaskSize

    - by user702295
    New 7.3.1.3 parameter: TargetTaskSize Old parameter: BranchID  Multiple, deprecated  7.3.1.3 onwards Parameter Location: Parameters > System Parameters > Engine > Proport   Default: 0   Engine Mode: Both   Details: Specifies how many MDP_MATRIX combinations the analytical engine attempts to assign to each forecasting task.  Allocation will be affected by forecsat tree branch size.  TaskTargetSize is automcatically calculated.  It holds the perferred branch size, in number of combinations in the lowest level. This parameter is adjusted to a lower value for smaller schemas, depending on the number of available engines.   - As the forecast is generated the engine goes up the tree using max_fore_level and not top_level -1.  Max_fore_level has     to be less than or equal to top_level -1.  Due to this requirement, combinations falling under the same top level -1     member must be in the same task.  A member of the top level -1 of the forecast tree is known as a branch.  An engine     task is therefore comprised of one or more branches.     - Reveal current task size       go to Engine Administrator --> View --> Branch Information and run the application on your Demantra schema.  This will be deprecated in 7.3.1.3 since there is no longer a means of adjusting the brach size directly.  The focus is now on proper hierarchy / forecast design.     - Control of tasks       The number of tasks created is the lowest of number of branches, as defined by top level -1 members in forecast       tree, and engine sessions and the value of TargetTaskSize.  You are used to using the branch multiplier in this       calculation.  As of 7.3.1.3, the branch ID multiple is deprecated.     - Discovery of current branch size       To resolve this you must review the 2nd highest level in the forecast tree (below highest/highest) as this is the       level which determines the size of the branches.  If a few resulting tasks are too large it is recommended that       the forecast tree level driving branches be revised or at times completely removed from the forecast tree.     - Control of foreacast tree branch size         - Run the following sql to determine how even the branches are being split by the engine:             select count(*),branch_id from mdp_matrix where prediction_status = 1 and do_fore = 1 group by branch_id;             This will give you an understanding if some of the individual branches have an unusually large number of           rows and thus might indicate that the engine is not efficiently dividing up the parallel tasks.         - Based on the results of this sql, we may want to adjust the branch id multiplier and/or the number of engines           (both of these settings are found in the Engine Administrator)           select count(*), level_id from mdp_matrix where prediction_status = 1 and do_fore = 1 group by level_id;           This will give us an understanding at which level of the Forecast tree where the forecast is being generated.            Having a majority of combinations higher on the forecast tree might indicate either a poorly designed forecast           tree and/or engine parameters that are too strict           Based on the results of this we would adjust the Forecast Tree to see if choosing a different hierarchy might           produce a forecast, with more combinations, at a lower level.           For example:             - Review the 2nd highest level in the forecast tree, below highest/highest, as this is the level which               determines the size of the branches.             - If a few resulting tasks are too large it is recommended that the forecast tree level driving branches               be revised or at times completely removed from the forecast tree.               - For example, if the highest level of the forecast tree is set to Brand/All Locations.             - You have 10 brands but 2 of the brands account for 67% and 29% of all combinations.             - There is a distinct possibility that the tasks resulting from these 2 branches will be too large for               a single engine to process.  Some possible solutions could be to remove the Brand level and instead               use a different product grouping which has a more even distribution, possibly Product Group.               - It is also possible to add a location dimension to this forecast tree level, for example Customer.                This will also reduce forecast tree branch size and will deliver a balanced task allocation.             - A correctly configured Forecast Tree is something that is done by the Implementation team and is               not the responsibility of Oracle Support.  Allocation will be affected by forecast tree branch size.  When TargetTaskSize is set to 0, the default value, the system automatically calculates a value for 'TargetTaskSize' depending on the number of engines.   - QUESTION:  Does this mean that if TargetTaskSize is 1, we use tree branch size to allocate branches to tasks instead                of automatically calculating the size?     ANSWER: DEV Strongly recommends that the setting of TargetTaskSize remain at the DEFAULT of ZERO (0).   - How to control the number of engines?     Determine how many CPUs are on the machine(s) that is (are) running the engine.  As mentioned earlier, the general     rule is that you should designate 2 engines per each CPU that is available.  So for example, if you are running the     engine on a machine that has 4 CPU then you can have up to 8 engines designated in the Engine Administrator.  In this     type of architecture then instead of having one 'localhost' in your Engine Settings Screen, you would have 'localhost'     repeated eight times in this field.     Where do I set the number of engines?                 To add multiples computers where engine will run, please do a back-up of Settings.xml file under         Analytical Engines\bin\ folder, then edit it and add there the selected machines.                 Example, this will allow 3 engines to start:         - <Entry>           <Key argument="ComputerNames" />           <Value type="string" argument="localhost,localhost,localhost" />           </Entry Otherwise, if there are no additional engines defined, the calculated value of 'TargetTaskSize' is used. (Oracle does not recommend changing the default value.) The TargetTaskSize holds the engines prefered branch size, in number of level 1 combinations.   - Level 1 combinations, known as group size The engine manager will use this parameter to attempt creating branches with similar size.   * The engine manager will not create engines that do not have a branch. The engine divider algorithm uses the value of 'TargetTaskSize' as a system-preferred branch size to create branches that are more equal in size which improves engine performance.  The engine divider will try to add as many tasks as possible to an existing branch, up to the limit of 'TargetTaskSize' level 1 combinations, before adding new branches. Coming up next: - The engine divider - Group size - Level 1 combinations - MAX_FORE_LEVEL - Engine Parameters  

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  • Java Meta Search Engine API

    - by Loki
    I'm currently researching Java libraries to help in building a meta type search engine in the sense of being able to replace any given search engine in the back-end of the application or to simultaneously search using multiple search engines. I'm not interested in the GUI part here, just the generalization of search engine APIs and usage. I'd like to know about the common libraries used to achieve this task and if there are any common patterns used in this case. I imagined that this problem is common enough to be able to find plenty of stuff on Google, but it seems like search is a very proprietary domain and not much information is fed back to the community.

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  • Extracting a Rails application into a plugin or engine

    - by Globalkeith
    I have a Rails 2.3 application which I would like to extract into a plugin, or engine. The application has user authentication, and basic cms capabilities supported by ancestry plugin. I want to extract the logic for the application into a plugin/engine so that I can use this code for future projects, with a different "skin" or "theme" if required. I'm not entirely sure I actually understand the difference between plugin and engine concepts, so that would be a good first point. What is the best approach, are there any good starting points, links, explanations, examples that I should follow. Also, with the release of R3 to consider, is there anything that I should be aware of for that, with regards to plugins etc. I am going to start off by watching Ryan's http://railscasts.com/episodes/149-rails-engines but obviously thats over a year old now, so one of the challenges I'm faced with is finding the most up to date and relevant information on this subject. All tips and help gratefully received.

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  • Templating Engine to Generate Simple Reports in .NET

    - by dr. evil
    I'm looking for a free templating engine to generate simple reports. I want some basic features such as : Ability to Write Loops (with any IEnumerable) Passing Variables Passing Templates Files (main template, footer, header) I'll use this to generate reports in HTML and XML. I'm not looking for a ASP.NET Template Engine. This is for a WinForms applications. I've seen this question http://stackoverflow.com/questions/340095/can-you-recommend-a-net-template-engine, however all of those template engines are total overkill for me and focused for ASP.NET. Please only recommend free libraries. // I'm still looking an NVelocity but it doesn't look any promising for .NET, overly complicated, when you download it's bunch of files not clear what to do, no tutorial, startup document etc.

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  • Is it a good plan to use 2D physics for a 3D racing game?

    - by user3195897
    I am working on a 3D racing game using SDL and OpenGL. I thought it would be easier to use a 2D physics engine, since I really don't need the 3rd dimension. There will be no flying cars or jumps, they will just be stuck to the floor, so I would use 2D colliders and that things to simulate collisions in a plane but render the actual game from a 3D perspective. So the real question is: is it possible, is it a dumb idea, what else can I do?

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  • Le moteur de jeux Unity arrive en version 4.3 et apporte un ensemble d'outils pour créer facilement des jeux 2D

    Le moteur de jeux Unity arrive en version 4.3 Cette version apporte un ensemble d'outil facilitant la création de jeux 2DPresque quatre mois après la version 4.2, l'équipe de développement d'Unity nous propose une nouvelle version du moteur de jeux.De nouveaux outils pour des jeux 2DComme cela avait été annoncé, cette version 4.3 intègre un ensemble d'outil facilitant la création de jeux 2D : Unity 4.3 - 2D Game Development Walkthrough - YouTube...

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  • GNUPLOT: 2d histogram from set of points.

    - by Arman
    Hello, I have a pairs of the points with their weights: #x y w 0.111342 0.478917 0.232487 0.398107 1.79559 0.221714 0.200731 2.58651 0.0776068 0.0967412 1.49904 0.0645355 6.17638 8.63101 0.715604 0.306128 3.10917 0.0984595 0.340707 3.19344 0.10669 7.18627 8.59859 0.835751 8.56 9.63894 0.888065 5.14272 6.86074 0.749587 0.747202 3.812 0.196013 8.71891 10.1355 0.860232 0.346714 1.45895 0.237647 5.21932 8.84491 0.590094 9.42138 12.2082 0.771725 0.215627 2.42317 0.0889856 How to plot nice 2d histogram image with color bar? I found nice density map description but I don't wont to go via python. I there way to use only gnuplot scripting? Kind Regards Arman.

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  • Horizontal lines and PDF drawing on iPhone/iPad Quartz 2D

    - by aron
    I'm trying to display a PDF of music using the Quartz 2D calls: CGPDFDocumentGetPage and CGPDFPageGetDrawingTransform The problem is that some horizontal lines in the PDF get drawn thicker than others. The biggest problem is that I notice this in Preview on the Mac and on iPhone/iPad. Even when viewing this PDF in the iPhone/iPad mail, I get the same problem. Here is the example: http://aronnelson.com/problem/pdfproblem.jpg Note that the PDF on the left is preview, the PDF on the right is the same file but in Google Docs. See how clean the Google Docs version is? Is there any way to fix this problem? Would it help to draw the PDF larger and zoom down using a UIScrollView? Any help appreciated. I can't find much info re: this problem. Aron

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  • Collision Detection - Java - Rectangle

    - by Trizicus
    I would like to know if this is a good idea that conforms to best practices that does not lead to obscenely confusing code or major performance hit(s): Make my own Collision detection class that extends Rectangle class. Then when instantiating that object doing something such as Collision col = new Rectangle(); <- Should I do that or is that something that should be avoided? I am aware that I 'can' but should I? I want to extend Rectangle class because of the contains() and intersects() methods; should I be doing that or should I be doing something else for 2D collision detection in Java?

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  • 2D colliding n-body simulation (fast Collision Detection for large number of balls)

    - by osgx
    Hello I want to write a program for simulating a motion of high number (N = 1000 - 10^5 and more) of bodies (circles) on 2D plane. All bodies have equal size and the only force between them is elastic collision. I want to get something like but in larger scale, with more balls and more dense filling of the plane (not a gas model as here, but smth like boiling water model). So I want a fast method of detection that ball number i does have any other ball on its path within 2*radius+V*delta_t distance. I don't want to do a full search of collision with N balls for each of i ball. (This search will be N^2.) PS Sorry for loop-animated GIF. Just press Esc to stop it. (Will not work in Chrome).

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  • Graphical sandbox for pathfinding

    - by vrode
    If you needed a clean and consistent sandbox for pathfinding what would you use? I want to experiment with different pathfinding algorithms by sending virtual units (robots) around obstacles on a geometric plane. But I don't need a feature overkill like a game engine or Flash might have, just an animated report and native collision detector. I prefer it to be scripted in python, but if there are java or C++ alternatives I would appreciate them as well.

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  • Sun Grid Engine: Automatically Terminating Idle Interactive Jobs

    - by dmcer
    We're considering using Sun Grid Engine on a small compute cluster. Right now, the current set up is pretty crude and just involves having people ssh to an open machine to run their jobs. We'd like to allow interactive jobs, since that should ease the transition from manually starting jobs to starting them using qsub. But, there is some concern that, if we do, people might accidentally leave their interactive sessions idle and block other jobs from being run on the machines. The issue isn't just theoretical, since we previously tried using OpenPBS and there was a problem with people opening up an interactive job in a screen session and essentially camping on a machine. Is there anyway to configure SGE to automatically kill idle interactive jobs? It looks like this was requested as an enhancement (Issue #:2447) way back in 2007. But, it doesn't seem like the request ever got implemented.

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  • Using recursion to find paths in a 2D array

    - by rikkit
    Hi, I'm working on a project for my A level. It involves finding the maximum flow of a network, and I'm using javascript. I have a 2D array, with values in the array representing a distance between the two points. An example of the array: 0 2 2 0 0 0 1 2 0 0 0 2 0 0 0 0 I think I need to use a recursive technique to find a path; below is some pseudocode, assuming that the array is 4x4. a is (0,0), b is (3,3). function search(a,b) from a to b if element(i,j) != 0 then store value of element search(j,3) I was wondering if that was the right construction for a depth first search. Thanks for any help.

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