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  • BigInteger.pow(BigInteger) ?

    - by PeterW
    I'm playing with numbers in Java, and want to see how big a number I can make. It is my understanding that BigInteger can hold a number of infinite size, so long as my computer has enough Memory to hold such a number, correct? My problem is that BigInteger.pow accepts only an int, not another BigInteger, which means I can only use a number up to 2,147,483,647 as the exponent. Is it possible to use the BigInteger class as such? BigInteger.pow(BigInteger) Thanks.

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  • Any difference in performance/compatibility of different languages in PostgreSQL?

    - by Igor
    In nowadays the PostgreSQL offers plenty of procedural languages: pl/pgsql, pl/perl, etc Are there any difference in the speed/memory consumption in procedures written in different languages? Does anybody have done any test? Is it true that to use the native pl/pgsql is the most correct choice? How the procedure written in C++ and compiled into loadable module differs in all parameter w.r.t. the user function written with pl/* languages?

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  • LinkSys WRT54GL + AM200 in half-bridge mode - Setup guide recommendations?

    - by Peter Mounce
    I am basically looking for a good guide on how to set up my home network with this set of hardware. I need: Dynamic DNS Firewall + port-forwarding VPN Wake-on-LAN from outside firewall VOIP would be nice QoS would be nice (make torrents take lower priority to other services when those other services are happening) DHCP Wireless + WPA2 security Ability to play multiplayer computer games I am not a networking or computing neophyte, but the last time I messed with network gear was a few years ago, so am needing to dust off knowledge I kinda half have. I have read that I should be wanting to set up the AM200 in half-bridge mode, so that the WRT54GL gets the WAN IP - this sounds like a good idea, but I'd still like to be advised. I have read that the dd-wrt firmware will meet my needs (though I gather I'll need the vpn-specific build, which appears to preclude supporting VOIP), but I'm not wedded to using it. My ISP supplies me with: a block of 8 static IPs, of which 5 are usable to me a PPPoA ADSL2+ connection

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  • FastMM and Dynamically loaded DLLs

    - by Vegar
    I have a host application, that loads a dozen of libraries at start up. I want to switch from Delphi 7s default memory manager to the full version of FastMM4 for better mem leak reporting. Should I include FastMM4 in the uses section of both the host application and the libraries? What about shared runtime packages? -Vegar

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  • Set Error-Pages for all Applications in Tomcat

    - by phisch
    I'm trying to set up custom error pages in tomcat 6, because I don't want the default ones to show up. My error pages are static html, no jsp or anything dynamic. I know how to do this through the web.xml in each application but I'd prefere to setup the error pages only once for the entire server. I tried to add the following fragment to the global web.xml (in conf), but no matter what I add under location, it does not show. <error-page> <error-code>404</error-code> <location>/404.html</location> </error-page> What do I need to do to gobally define custom error pages? Thanks!

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  • Web Server for SVN+PHP+Django+Rails

    - by NetStudent
    Foreword: I am not asking for the differences between Nginx and Apache, nor do I want to start a "which one is better discussion. I would like to ask for help with choosing the most adequate solution for this particular situation. I need to setup one or more l SVN repositories accessible via HTTP, plus some PHP, Django and Ruby websites. However, and since I only have 512Mb of RAM at my disposal, I fear that Apache will be a too heavy choice... On the other hand, I have heard that Nginx does not fully support SVN (WebDAV) and Django without reverse proxying to Apache. Is this still true? Should I go for Apache/Nginx alone? Or should I set up both and have Nginx handling static content and proxying to Apacge for dynamic content?

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  • How to tile a 30000 x 6000 image for a 480 x 320 screen?

    - by Horace Ho
    (this is related to another question about implementation on iPhone) I have a large image, size around 30000 (w) x 6000 (h) pixels. You may consider it's like a big map. I assume I need to crop it up into smaller tiles. Questions: what is the tile strategy? Requirements: whole image (though cropped) can be scrolled up/down/left/right by swipes zoom in (up to pixel-to-pixel) out (down to screen-fit-by-height) by the 2-finger operation memory efficiency by lazy loading tiles Thanks!

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  • Optimum size of transaction in Postgres?

    - by Joe
    I'm running a process that does a lot of updates ( 100,000) to a table. I have the choice between putting all the updates in a single transaction or committing transactions every 1000 or so. Ignore for the moment the case where a transaction fails and is aborted. I'm interested in the best size of transaction for memory and speed efficiency.

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  • Permission forbidden on localhost with apache2

    - by N Alex
    Here is what I am trying to do. I tried to add another folder to apache and I get the following error when trying to acces testing/index.html. The idea is that I would like to have for every customer a folder like /home/neagoe/Work/InterWebs/Projects/[PROJECT NAME]/CustomerProjects/website/dist. Forbidden You don't have permission to access /index.html on this server. Apache/2.2.22 (Ubuntu) Server at testing Port 80 Here are the steps that I followed: Step1: sudo chmod a+x /home/neagoe/Work/InterWebs/Projects/testing/CustomerProjects/website/dist Step2: sudo chown -R www-data:www-data /home/neagoe/Work/InterWebs/Projects/testing/CustomerProjects/website/dist sudo chmod -R 775 /home/neagoe/Work/InterWebs/Projects/testing/CustomerProjects/website/dist Step3: sudo adduser $USER www-data Step4: sudo a2enmod userdir Step5: sudo cp /etc/apache/sites-available/default /etc/apache/sites-available/testing I edited the file /etc/apache/sites-available/testing so it looks like this: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName testing DocumentRoot /home/neagoe/Work/InterWebs/Projects/testing/CustomerProjects/website/dist <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /home/neagoe/Work/InterWebs/Projects/testing/CustomerProjects/website/dist/ > Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> Step6: I edited hosts ("/etc/hosts") so it looks like this: 127.0.0.1 localhost 127.0.0.1 testing # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters Step7: sudo a2ensite testing sudo service apache2 restart I searched for about 2 hours on the internet but I can't figure out what went wrong. All the pages that I found following the same steps as described above. I know there are similar questions here on the internet, but the answer is to change permission to the directory which I did on Step2. I am sorry if this is really a duplicate but I could't find the right answer. Thank you! PS. I asked this also on AskUbuntu but didn't get any answers so I'm trying my luck here. Edit: There isn't much on the error log or the access log. On the access.log: ::1 - - [10/Aug/2013:11:23:28 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:29 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:31 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:32 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:33 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:34 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:35 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" 127.0.0.1 - - [10/Aug/2013:11:23:23 +0300] "POST /wordpress-testing/wp-cron.php?doing_wp_cron=1376123003.7026669979095458984375 HTTP/1.0" 200 705 "-" "WordPress/3.6; http://localhost/wordpress-testing" ::1 - - [10/Aug/2013:11:23:36 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:37 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" ::1 - - [10/Aug/2013:11:23:38 +0300] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)" 127.0.0.1 - - [10/Aug/2013:11:31:32 +0300] "GET /index.html HTTP/1.1" 200 485 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0) Gecko/20100101 Firefox/23.0" And the last line repeats for about 200 rows. On the error.log: 1. This lines repeat from time to time. PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525 /msql.so' - /usr/lib/php5/20100525/msql.so: cannot open shared object file: No such file or directory in Unknown on line 0 [Sat Aug 10 13:06:42 2013] [notice] Apache/2.2.22 (Ubuntu) PHP/5.4.9-4ubuntu2.2 configured -- resuming normal operations [Sat Aug 10 13:07:36 2013] [notice] caught SIGTERM, shutting down PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/msql.so' - /usr/lib/php5/20100525/msql.so: cannot open shared object file: No such file or directory in Unknown on line 0 [Sat Aug 10 13:07:37 2013] [notice] Apache/2.2.22 (Ubuntu) PHP/5.4.9-4ubuntu2.2 configured -- resuming normal operations 2. And this is the predominant error. (hundreds of lines) [Sat Aug 10 13:07:40 2013] [error] [client 127.0.0.1] (13)Permission denied: access to /index.html denied

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  • How come I can't ping my home computer?

    - by bikefixxer
    I'm trying to set up a vpn into my home computer in order to access files from wherever. I have the home computer set up with a no-ip dynamic dns program so I can always connect, and have also tried using the actual ip address. However, when I try to connect or even ping from anywhere outside of my house I can't get through. I've tried putting that particular computer in the dmz, turned off the computers firewall and anti-virus, and I still don't get anything. I have comcast as my home internet provider. I have also tried from two different locations. Are there any other solutions I can try or is comcast the issue? I used to be able to do this when I ran a small web server at home for fun but now nothing works. Thanks in advance for any suggestions!

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  • Xdebug 2.0.5 with Zend Server CE PHP5.2.12 possible?

    - by notbrain
    I'm using Zend Server CE with PHP 5.2.12 on OSX Snow Leopard and want to use Xdebug. I've turned off Zend Data Cache, Zend Optimizer+, and Zend Debugger in the console. When I run $ cd ~/Downloads/xdebug-2.0.5 $ /usr/local/zend/bin/phpize I get Configuring for: PHP Api Version: 20041225 Zend Module Api No: 20060613 Zend Extension Api No: 220060519 The PHP API Version, 20041225, seems to be off from the documentation (aka wrong). When I continue installation with $ ./configure ---with-php-config=/usr/local/zend/bin/php-config $ make $ sudo make install The installed xdebug.so seems to be the wrong one. Which version of xdebug do I need for this PHP API version? The Zend API numbers are ok. I'm just confused at why the PHP API Version doesn't match. PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/zend/lib/php_extensions/xdebug.so' - (null) in Unknown on line 0 PHP 5.2.12 (cli) (built: Feb 17 2010 13:39:36)

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  • Avoid writing SQL queries altogether in SSIS

    - by Jonn
    Working on a Data Warehouse project, the guy that gave us the tutorial advised that we stick to using SQL queries over defining a lot of data flow transformations, citing points like it'll consume a lot of memory on the ETL box so we'd rather leave the processing to the DB box. Is this really advisable? Where's the balance between relying on GUI tools over executing a bunch of SQL scripts on your Integration package? And honestly, I'd like to avoid writing SQL queries as much as I can.

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  • How do you use technology to memorize set of terms?

    - by user49767
    Always there are few set of items needs to be memorized in short span of time. Here are my following cases. 1) My Job requires some set of items needs to be memorized. 2) I am a developer who has to learn 150+ tags within next 3 days. 3) Fix developer/support has to remember minimum of 125+ tags (set of possible values). 4) It is better if team's SQL developer knows all the table and columns in my database. 5) When guys join new department or job. Memorizing few related items will definitely gives some benefit. Most of the cases, I suggest people to understand the domain better and nothing wrong in using google (but remember correct search-word). But recently I came across a junior developer who took lot of effort in memorizing set of things (150+ table structures, fix protocol tags, almost 300+ configuration items from property file) and was very very successful in his job and was swift in responding for support queries. Needless to say he is smart worker too (not a dumb guy). When I try to recollect some of the successful employees I met, they were so good in remembering entire schema and they did in short span of time. But I don't argue that memorizing alone gives success, but it greatly helps when situation demands. Here my question is, I am not good at remembering things, but it shouldn't be lame excuse. Hence I am evaluating using technolgies better to memorize set of items. Not very much interested in memory techniques (mnemoninc, photography memory, etc..). Even I have recorded 100+ items and listen to that whenever I found free time, defintely there were some fruitful result. Now I need your suggestion about what are all the ways to exploit technology to memorize. There could be so many reason why guys remember a subject (passionate, essential, author, creator, responsbile). Not interested in dissecting why guys remeber. Rather much interested in using ways, and techniques (cheat sheet...) to remember a set of itmes. Note : I appreciate, encourage people who could rephrase my question better. Note : I have kept couple of cheat-sheet close to my monitor, honestly it did not help me :).

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  • In Nginx, can I handle both a location:url or a content-type: text/html response from memcached?

    - by Sean Foo
    I'm setting up an nginx - apache reverse proxy where nginx handles the static files and apache the dynamic. I have a search engine and depending on search parameter I either directly forward the user to the page they are looking for or provide a set of search results. I cache these results in memcached as key:/search.cgi?q=foo value: LOCATION:http://www.example.com/foo.html and key:/search.cgi?q=bar value: CONTENT-TYPE: text/html <html> .... .... </html> I can pull the "Content-type...." values out of memcached using nginx and send them to the user, but I can't quite figure out how to handle a returned value like "Location..." Can I?

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  • Win32: How to crash?

    - by Ian Boyd
    i'm trying to figure out where Windows Error Reports are saved; i hit Send on some earlier today, but i forgot that i want to "view the details" so i can examine the memory minidumps. But i cannot find where they are stored (and google doesn't know). So i want to write a dummy application that will crash, show the WER dialog, let me click "view the details" so i can get to the folder where the dumps are saved. How can i crash on Windows?

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  • Object serialization practical uses?

    - by nash
    How many software projects have you worked on used object serialization? I personally never came across a scenario where object serialization was used. One use case i can think of is, a server software storing objects to disk to save memory. Are there other types of software where object serialization is essential or preferred over a database?

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  • graph algorithms on GPU

    - by scatman
    the current GPU threads are somehow limited (memory limit, limit of data structures, no recursion...). do you think it would be feasible to implement a graph theory problem on GPU. for example vertex cover? dominating set? independent set? max clique?.... is it also feasible to have branch-and-bound algorithms on GPUs? Recursive backtracking?

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  • USB windows xp final USB access issues

    - by Lex Dean
    I basically understand you C++ people, Please do not get distracted because I'm writing in Delphi. I have a stable USB Listing method that accesses all my USB devices I get the devicepath, and this structure: TSPDevInfoData = packed record Size: DWORD; ClassGuid: TGUID; DevInst: DWORD; // DEVINST handle Reserved: DWord; end; I get my ProductID and VenderID successfully from my DevicePath Lists all USB devices connected to the computer at the time That enables me to access the registry data to each device in a stable way. What I'm lacking is a little direction Is friendly name able to be written inside the connected USB Micro chips by the firmware programmer? (I'm thinking of this to identify the device even further, or is this to help identify Bulk data transfer devices like memory sticks and camera's) Can I use SPDRP_REMOVAL_POLICY_OVERRIDE to some how reset these polices What else can I do with the registry details. Identifying when some one unplugs a device The program is using (in windows XP standard) I used a documented windows event that did not respond. Can I read a registry value to identify if its still connected? using CreateFileA (DevicePath) to send and receive data I have read when some one unplugs in the middle of a data transfer its difficult clearing resources. what can IoCreateDevice do for me and how does one use it for that task This two way point of connection status and system lock up situations is very concerning. Has some one read anything about this subject recently? My objectives are to 1. list connected USB devices identify a in development Micro Controller from everything else send and receive data in a stable and fast way to the limits of the controller No lock up's transferring data Note I'm not using any service packs I understand everything USB is in ANSI when windows xp is not and .Net is all about ANSI (what a waste of memory) I plan to continue this project into a .net at a later date as an addition. MSDN gives me Structures and Functions and what should link to what ok but say little to what they get used for. What is available in my language Delphi is way over priced that it needs a major price drop.

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  • how to load part of the HTML page which is currently on display ?

    - by ganapati hegde
    Hi, i have an ebook(relatively large size say 800 pages),in HTML format. I am opening that book as webpage using webkit-gtk+. If i load the whole book at a time,it takes too much memory(RAM ).So i dont want to load the whole book at a time, but load the part of the book which is currently on display. and when the user scrolls down, next part should be displayed.How can i implement that ?

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  • Tomcat session stickiness in session replication

    - by rabbit
    Hi, I am having a 2 instance load balanced and session replicated tomcat 6.0.20 cluster. Should sticky_session be set to true or false for in memory session replication. http://tomcat.apache.org/connectors-doc/reference/workers.html mentions : Set sticky_session to False when Tomcat is using a Session Manager which can persist session data across multiple instances of Tomcat. where as /tomcat-6.0-doc/cluster-howto.html (Cluster Basics) mentions : Make sure that your loadbalancer is configured for sticky session mode.

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