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• clone() only partially doable; how to react?

  - by hllnll

  Suppose we have a class-hierarchy whose base class B requires a clone() method to be defined in its derivations. Whilst this works perfectly for most of them there is this one derivation X that holds an optional reference to a resource/object that can only be referenced from one instance of X. Whilst the rest of X can be cloned without problems this reference would have to be set to null/nil/nullptr. What is the correct way to handle this situation? X::clone() could throw an UncloneableException. Though this would be correct, it is not satisfying. Set the reference to null/nil/nullptr and leave no notice of it. The user of X has to know about Xs "particularities". Require derivations of B to define B::nearestClone(): the user of B has to be aware that the return value might not be a 1:1 clone. Something else?

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• Setting umask globally

  - by DevSolar

  I am using a private user group setup, i.e. a user foo's home directory is owned by foo:foo, not foo:users. For this to work, I need to set the umask to 002 globally. After a quick grep -RIi umask /etc/*, it seemed for a moment that modifying the UMASK entry in /etc/login.defs should do the trick. It does, too -- but only for console logins. If I log in to my desktop, and open a terminal there, I still get to see the default umask 022. Same goes for files created from apps started through the menu. Apparently, the display manager (or whatever X11 component responsible) does source some different setting than a console login does, and damned if I could tell which one it is. (I tried changing the setting in /etc/init.d/rc, and no, it did not help.) How / where do I set umask globally, so that the X11 desktop environment gets the memo as well?

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• How can I force new windows to open in background & without focus?

  - by sup

  I have Opera set as my default browser but it is the same for Firefox. When opening a link in Liferea, the link opens in an external browser and the browser gets focus. I would like to open the links in background (so that the browser does not get focus). The only solution is to set Focus prevention level to Normal in the Focus & Raise Behaviour tab of General options in CCSM. But this messes things for other things. DO you have any other idea how to prevent new windows to have focus? I am using Unity on 11.10.

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• battery icon / power indicator not shown in menu bar after upgrade to 12.04

  - by user488728

  since the upgrade from 11.10 to 12.04 the battery icon / power indicator is not shown any more in the menu bar. I went to 'system settings'--'power' and tried to set 'show battery status in menu bar' to 'always', however the selection button seems to be corrupt. Strangely, when I open the power settings dialog, the 'show battery status in menu bar' field is set to an empty string instead of showing one of the three possible choices. When I click on the small arrow next to it, the three possible choices are shown. Whatever I select, upon closing the settings dialog and reopening it, the selection field is back to empty. Please help. Thanks! HF

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• Network programming under windows: is WSA functions can be more complete than pSock functions [on hold]

  - by Kane

  I plan to make a set of classic socket functions to simplify their usages. Since i work under windows and linux indifferently i usually make it portable (it's not my first version of this set of functions), but i want to do something different this time and dedicate one version to windows, and one other to linux. With that i wonder for the windows version, if the WSA* functions can have any interest using them instead of the psock ones. I have found nothing about a comparison between them, so if any of you have any idea, suggestion, link or benchmark ?

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• Correct permissions for /var/www and wordpress

  - by dpbklyn

  Hello and thank you in advance! I am relatively new to ubuntu, so please excuse the newbie-ness of this question... I have set up a LAMP server (ubuntu server 11.10) and I have access via SSH and to the "it works" page from a web browser from inside my network (via ip address) and from outside using dyndns. I have a couple of projects in development with some outside developers and I want to use this server as a development server for testing and for client approvals. We have some Wordpress projects that sit in subdirectories in /var/www/wordpress1 /var/www/wordpress2, etc. I cannot access these sub directories from a browser in order to set up WP--or (I assume) to see the content on a browser. I get a 403 Forbidden error on my browser. I assume that this is a permissions problem. Can you please tell me the proper settings for the permissions to: 1) Allow the developers and me to read/write. 2) to allow WP set up and do its thing 3) Allow visitors to access the site(s) via the web. I should also mention that the subfolder are actually simlinks to folder on another internal hdd--I don't think this will make a difference, but I thought I should disclose. Since I am a newbie to ubuntu, step-by-step directions are greatly appreciated! Thank you for taking the time! dp total 12 drwxr-xr-x 2 root root 4096 2012-07-12 10:55 . drwxr-xr-x 13 root root 4096 2012-07-11 20:02 .. lrwxrwxrwx 1 root root 43 2012-07-11 20:45 admin_media -> /root/django_src/django/contrib/admin/media -rw-r--r-- 1 root root 177 2012-07-11 17:50 index.html lrwxrwxrwx 1 root root 14 2012-07-11 20:42 media -> /hdd/web/media lrwxrwxrwx 1 root root 18 2012-07-12 10:55 wordpress -> /hdd/web/wordpress Here is the result of using chown -R www-data:www-data /var/www total 12 drwxr-xr-x 2 www-data www-data 4096 2012-07-12 10:55 . drwxr-xr-x 13 root root 4096 2012-07-11 20:02 .. lrwxrwxrwx 1 www-data www-data 43 2012-07-11 20:45 admin_media -> /root/django_src/django/contrib/admin/media -rw-r--r-- 1 www-data www-data 177 2012-07-11 17:50 index.html lrwxrwxrwx 1 www-data www-data 14 2012-07-11 20:42 media -> /hdd/web/media lrwxrwxrwx 1 www-data www-data 18 2012-07-12 10:55 wordpress -> /hdd/web/wordpress I am still unable to access via browser...

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• Google is still crawling and indexing my old, dummy, test pages which now are 404 not found

  - by Ace

  I have set up my site with sample pages and data (lorem ipsum, etc..) and Google has crawled these pages. I deleted all these pages and actually added real content but in webmaster tools, i still get a lot of 404 errors Google trying to crawl these pages. I have set them to "mark as resolved" but some pages still come back as 404. Furthermore, I have a lot of these sample pages still listed when i do a search of my site on Google. How to remove them. I think these irrelevant pages are hurting my rating. I actually wanted to erase all these pages and start getting my site being being indexed as a new one but I read it's not possible? (I have submitted a sitemap and used "Fetch as Google.")

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• How to name multi-setter?

  - by IAdapter

  I'm struggling with how to name this method, I don't like the "set" prefix, because I feel it should be reserved for normal "dumb" setters and some tools might not like it (i did not check it in checkstyle, pmd, etc., but I got a feeling they won't like it.) for example (in java, but I feel its language agnostic) public void setField1Field2(String field1, String field2) { this.field1 = field1; this.field2 = field2; } The only purpose of this method is ONLY to set, this method is needed and cannot be joined with any other (because of framework used).

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• New 12.10 Install, Windows Not in Boot Menu

  - by Alex Samons

  I just installed Ubuntu 12.10 on my new computer alongside my previous Windows 7 installation. Upon booting for the first time (post install) my boot menu only lists Ubuntu. I installed using a liveCD, I had to set up my partitions myself because my Windows wasn't being detected (I set up the new partition out of free space on the drive.). I know Ubuntu did not overwrite my Windows because I can mount the Windows drive and access the files from here I also tried running boot-repair, as was recommended for people who didn't have Ubuntu showing up in the menu, but now I just have two different Ubuntu options. Still no windows. (if you require any additional data [logs, etc.], could you tell me how to find it, I am a bit new to this.) Any help is greatly appreciated, thank you.

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• Print Problem: Page Squeezed in Half

  - by iam

  I've just managed to successfully set up my printer (Canon MX320) using the Printing app on Ubuntu 12.04. However the only 1 remaining problem is that each time I tried to print it will only print the file on the top half of the page only: meaning that for some reason, the printer "squeezes" the whole content of each page in the file to fit into the top half of the page only (so the proportion in the print-out is not correct vertically). This happens with every type of file I tried to print (Documents, Images, Web pages). I checked the Printing's setting & properties and couldn't find anything related to this issue yet and I've already made sure to set all the information correct (paper size, source etc.). The Print Preview always display correctly on the screen, but it's only the actual print-out that shows this problem. I also tried with several different types of papers (A4, photos etc.) but the result is always the same: the printer keeps putting the content in the top half of the paper only.

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• What is the correct way to use glTexCoordPointer?

  - by RubyKing

  I'm trying to work out how to use this function glTexCoordPointer. The man page states that I must set a pointer to the first element of the array that uses the texture cordinate. Here is my array: static const GLfloat GUIVertices[] = { //FIRST QUAD 1.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, -1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.94f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.94f, 0.0f, 1.0f, 1.0f, 1.0f, //2ND QUAD // x y z w X Y 1.0f, -1.0f, 0.0f, 1.0f, 1.0f, 0.0f, -1.0f, -1.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f, -0.94f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, -0.94f, 0.0f, 1.0f, 1.0f, 1.0, }; But how do I set the pointer correctly for the fifth element on the 2nd quad first row? I was thinking something like this: glTexCoordPointer(1, GL_FLOAT, 6, reinterpret_cast<const GLvoid *>(29 * sizeof(float)));

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• Cocos2d: carom like game

  - by Raj

  Now I am working on carrom like game using cocos2d+Box2d. I set world gravity(0,0), want gravity in z - axis. I set following value for coin striker body: Coin body: density = 20.0f; friction = 0.4f; restitution = 0.6f; Shape Circle with radius - 15/PTM_RATIO Striker body: density = 25.0f; friction = 0.6f; restitution = 0.3f; Shape Circle with radius - 15/PTM_RATIO Output is not smooth, when I apply ApplyLinearImpulse(force,position); Coin movement looks like floating in air....takes too much time to stop... Which value of coin and striker makes it look like real carom?

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• How do I control Front and Back volume independently with cloned stereo signal

  - by someguy1984

  hello I have my 7.1 soundcard set to stereo and plugged in two stereo thingies (a. my desktop speakers b. my stereo) to the front respectively rear plug. Now I would like to an easy way to mute/volume control them independently - gui if possible. If I set my soundcard to 4.0, the pulse audio mixer gives me sliders for front and back but the problem is that's the input signal. so if i mute the front there and I'm listening to stereo everything remains silent. But what I'd have liked in that scenario would be the front to be silent and the back playing the full stereo signal. Is there a way to do that or something similar?

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• Civilization 4: time in own scenario runs up too quickly.

  - by oKtosiTe

  In Civilization 4 (Beyond the Sword) I started making a scenario that focuses on the colonization of North America. For added realism, I set the StartYear=1780. Everytime I run the scenario, the time runs up far too quickly–probably because I set Era=ERA_ANCIENT and GameTurn=0–so that after just twenty turns the clock nears present day. I'm not really sure how to go fix this, other than by playing an actual marathon game from the start up to the year 1780 and copy over the values. Is there any way to calculate/know the right values for my scenario?

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• OutOfBounds Exception when creating a PolygonShape using jbox2d

  - by B3nGr33ni3r

  So here's the deal, i'm parsing a file that contains the vertices for a polygon, that i want to create in box2d. I create a new PolygonShape() and then call .set() giving it a defined array of Vec, and that defined array's .length property. I expected this to work, since the documentation for jbox2d says this method takes a Vec array, and the count of Vec objects in that array. However, it errors out, and it seems to be unrelated to my code. The error i get is Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 8 at org.jbox2d.collision.shapes.PolygonShape.set(PolygonShape.java:174) and, upon looking at that line in the jbox2d svn repository, i still cannot figure out the issue. Any help is appreciated!

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• How to configure simple game AI setting with jtable

  - by Asgard

  I'm developing an application that has methods of this kind: attackIfIsFar(); protectIfIsNear(); helpAfterDeadOf(); helpBeforeAttackOf(); etc. The initialization of my application for n players is something like player1.attackIfIsFar(player2); player2.protectIfIsNear(player4); player3.helpAfterDeadOf(player1); player4.helpBeforeAttackOf(player3); etc. I don't know how to configure a jtable that that can allow me to set the equivalent of this code-block In others words I need simply a way to create a jtable with 3 column and n row, were I can set in the column 1 and 3, the player, and in the central column one of the available methods that each player on the column 1 must invoke on each player of column 3

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• Connecting Ubuntu home server to internet via laptop

  - by Gray-Wolfe

  I recently got a spare desktop computer from a relative to play around with and since I've been using Ubuntu for a few years I decided to install Ubuntu Server 12.04 to play around with and learn more. However it doesn't have a wireless card, the wireless adapter had a shipping error and will be awhile, and plugging it into the router is not an option. So I figured I could give it access to the wifi from my laptop(which I switch between Windows and Ubuntu) so I could at least get some things started and set up while I'm waiting for the adapter. However the few guides I can find to do that require a GUI, something lacking on the server version. Could someone tell me how to set this up via the terminal? I would appreciate it.

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• Disable mobile page redirection for SharePoint 2013

  - by Sahil Malik

  SharePoint, WCF and Azure Trainings: more information SharePoint 2013 (foundation too), detects requests from mobile devices and automatically changes the uRL of the requested non mobile page to its mobile substitute. This logic is now built into SPRequestModule. The mobile view is pretty damned amazing. Even though the set of pages for mobile access is completely different, SharePoint has an entirely separate set of controls for the mobile pages. These are in the Microsoft.SharePoint.MobileControls namespace which inherit from Microsoft ASP.NET controls in the System.Web.UI.MobileControls namespace. These Mobile pages can even use mobile Web Part adapters to mimic the behavior of webparts on mobile webpart pages. Read full article ....

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• Preseed Ubuntu installation with full disk encryption

  - by user249264

  I am trying to set up Ubuntu full disk encryption using preseeding. I was able to set things up correctly following the preseed file presented here. But I do not want to provide the default password in the preseed file. Is there a way to let ubiquity fall to the screen that asks for the encryption passphrase just like it does when the username is not provided in the preseed file? When I try to leave the passphrase option empty in the preseed file, I get an error in the installer saying "An error occured while creating the keyfile".

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• Shut down Netbook by closing lid - ubunti 13.10

  - by The Liquidator

  My wife has an Acer Aspire One (with the SSD Card and an SD expansion card). It has never been able to hibernate or suspend, always creating errors and occasionally trashing the data on the SD card, which is the home partition so it's unfortunate. To get around the problem I have set all exit methods to produce shutdown - she tends to simply shut the lid. I'm aware the default behaviour has for some time been to suspend, but I've got round that using the gnome tweak tool. However, I've just installed 13.10 and whilst I have installed the gnome tweak tool and set it to shut down the system appears to be ignoring/bypassing the setting, electing to suspend when the lid is shut. Can anyone tell me how to fix it please? I'm quite happy to get my hands dirty with the command line.

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• Another Update to SQL Server Configuration Scripting Utility

  - by Bill Graziano

  I’ve been gradually adding features to my utility that scripts the configuration of a SQL Server.  Since my last post I’ve added the following features: Skip any encrypted object in a database Script alerts, alert notifications and operators Script audits Always script model, master and msdb to capture any user-defined objects in those databases Logins are now scripted so that everything for a login is grouped together. There’s a second section in the logins that handles default databases.  In many cases a login’s default database is a mirror target and can’t be set.  This is now handled gracefully.  It also includes a separate section for all default databases so those can be quickly set in the event of a disaster. Script credentials Script proxy accounts Script database mail My goal is still to get everything outside a database scripted.  This release is enough that I can keep my mirror target servers in sync with their principals.

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• Showing "Failed" for a SharePoint 2010 Timer Job Status

  - by Damon

  I have been working with a bunch of custom timer jobs for last month.  Basically, I'm processing a bunch of SharePoint items from the timer job and since I don't want the job failing because of an error on one item, so I'm handing errors on an item-by-item basis and just continuing on with the next item.  The net result of this, I soon found, is that my timer job actually says it ran successfully even if every single item fails.  So I figured I would just set the "Failed" status on the timer job is anything went wrong so an administrator could see that not all was well. However, I quickly found that there is no way to set a timer job status.  If you want the status to show up as "Failed" then the only way to do it is to throw an exception.  In my case, I just used a flag to store whether or not an error had occurred, and if so the the timer job throws a an exception just before existing to let the status display correctly.

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• What should I do if my text exceeds my text render target boundaries?

  - by user1423893

  I have a method for drawing strings in 3D that does the following: Set a render target Draw each character as a quadrangle using a orthographic projection to the render target Unset the render target Draw the render target texture using a perspective projection and a world transform My problem is how to deal with strings whose characters length exceeds that of the render target dimensions? For example if I have string "This is a reallllllllllly long string" and the render target can't accommodate it, it will only capture "This is a realllll". The render target (and its size) could be set each frame but wouldn't that be far too costly?

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• Is this a pattern? Should it be?

  - by Arkadiy

  The following is more of a statement than a question - it describes something that may be a pattern. The question is: is this a known pattern? Or, if it's not, should it be? I've had a situation where I had to iterate over two dissimilar multi-layer data structures and copy information from one to the other. Depending on particular use case, I had around eight different kinds of layers, combined in about eight different combinations: A-B-C B-C A-C D-E A-D-E and so on After a few unsuccessful attempts to factor out the repetition of per-layer iteration code, I realized that the key difficulty in this refactoring was the fact that the bottom level needed access to data gathered at higher levels. To explicitly accommodate this requirement, I introduced IterationContext class with a number of get() and set() methods for accumulating the necessary information. In the end, I had the following class structure: class Iterator { virtual void iterateOver(const Structure &dataStructure1, IterationContext &ctx) const = 0; }; class RecursingIterator : public Iterator { RecursingIterator(const Iterator &below); }; class IterateOverA : public RecursingIterator { virtual void iterateOver(const Structure &dataStructure1, IterationContext &ctx) const { // Iterate over members in dataStructure1 // locate corresponding item in dataStructure2 (passed via context) // and set it in the context // invoke the sub-iterator }; class IterateOverB : public RecursingIterator { virtual void iterateOver(const Structure &dataStructure1, IterationContext &ctx) const { // iterate over members dataStructure2 (form context) // set dataStructure2's item in the context // locate corresponding item in dataStructure2 (passed via context) // invoke the sub-iterator }; void main() { class FinalCopy : public Iterator { virtual void iterateOver(const Structure &dataStructure1, IterationContext &ctx) const { // copy data from structure 1 to structure 2 in the context, // using some data from higher levels as needed } } IterationContext ctx(dateStructure2); IterateOverA(IterateOverB(FinalCopy())).iterate(dataStructure1, ctx); } It so happens that dataStructure1 is a uniform data structure, similar to XML DOM in that respect, while dataStructure2 is a legacy data structure made of various structs and arrays. This allows me to pass dataStructure1 outside of the context for convenience. In general, either side of the iteration or both sides may be passed via context, as convenient. The key situation points are: complicated code that needs to be invoked in "layers", with multiple combinations of layer types possible at the bottom layer, the information from top layers needs to be visible. The key implementation points are: use of context class to access the data from all levels of iteration complicated iteration code encapsulated in implementation of pure virtual function two interfaces - one aware of underlying iterator, one not aware of it. use of const & to simplify the usage syntax.

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• How can I get Gnome3 to remember my session?

  - by user60381

  I am running Gnome3, but I had the same problem with Unity, on Ubuntu 12.04. I have a fairly elaborate setup I enjoy using day-to-day. A LibreOffice spreadsheet with everyone's extension numbers; a window with reference data I use regularly; two mulit-tabbed Konsole/Terminal windows with several remote systems sessions, firefox with a set of open tabs, and so on. But whenever I log out, when I return, I must set up everything from scratch. I remember the good 'ol days, when I rebooted, I'd re-log in, and all my windows came back up in the same places as they were when I logged out, and my Konsole/Term would come up with the same remote logins as before.... I'd have to re -setup some of my programs, but that's better than having to move every win into place, and resize them, etc. How do I get this functionality back?

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