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• What is the correct pattern to use in this case?

  - by nulliusinverba

  I'm sure this scenario has arisen before, and I want to know what experience has taught to be the best solution. I have a number of classes that are all of a kind. Say all the objects are "Content". They may be "Article", or "Book" for example. The reason I want the "Content" abstraction is because I want to define a number of behaviours for all "Content" objects and not have to build a new DB Table and 10 classes of essentially the same code for each type of "Content". For example, to attach a "Tag" or a "Premise" to a content object would be much nicer if, say, I just had two columns one for ContentID and one for TagID. A solution I've played around with is to have a Content table with a unique ID, and then to have foreign key references on all the other tables (Book, Article, etc). This has actually proven quite solid, but I'm just not sure about it. Do you know how to call this described pattern?

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• What is the sudo password after I deleted the password for the user?

  - by Ubuntunewbie

  To have an easier access to the computer I deleted the user's password so it is blank. But now I'm still asked to type in a password for sudo actions such as installing programms, etc. I know that this belongs to Ubuntu's outrageous security policy (which is why I use Ubuntu in the first place..) but I don't have any password to enter any more!! The old user password is not accepted and anything else (like just hitting enter) doesn't work either. I already tried the recovery mode (root shell) way passwd USER< but it replied that it can't access the password or it has no authority. Thanks in advance for your help!

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• Coverity publie Coverity Security Library, une bibliothèque open-source pour identifier les défauts de sécurité dans les applis Web Java

  Coverity publie Coverity Security Library Une bibliothèque open source pour identifier les défauts de sécurité les plus courants dans les applis Web Java Coverity, un des leaders du marché du test de développement, vient d'annoncer la création de la Coverity Security Library, un projet open source (disponible via GitHub et Maven) pour aider les développeurs à réparer les attaques de type cross-site scripting (XSS) dans les applications Web Java. Ce projet a été initié par le Security Research Laboratory de Coverity. Il s'agit d'une bibliothèque de fonctions de contournement et de codage gratuite. « Les développeurs peuvent ainsi réparer rapidement les problèmes les plus courants, qui p...

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• Port flash game to native android

  - by wirate

  Alright here is the problem: the creators of a quite popular flash-based game have asked me to port their game to Android. They are not interested in any other platforms so we don't need to be worrying about iOS or PC. They want the best performance on just Android (I guess that's the point of porting a flash-based game. They could have just went with it) They found Unity 'slow'. How would the performance (on android) of other engines compare? Are they expecting too much i.e. finding Unity slow? I am in favor of Unity since development is a little easier with more things being visual (I am not experienced as you might have guessed). This would be an example of the type of game I am to port Thanks!

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• Drag and Drop Team Selection

  - by davidjwest

  I have a Fantasy F1 Website, currently users select their teams using dropdown menus. It works OK but isn't as user friendly as I would like. I would like to implement a drag and drop type of system, there's jQuery code out there that would go part of the way to allowing me to do this: http://jqueryui.com/demos/draggable/ But I am not sure about how to integrate that into PHP and MySQL, my jQuery skills are limited! I'd also need to stop them spending more than a certain amount of money, each driver has a value and the teams can only spend a certain amount of money. There's also limits for example you can only pick a driver once, but you can have three different drivers. Finally, how would you decide that the user had picked their team, I don't want a submit button as that kind of defeats the object of the exercise! Thanks for any advice, I don't expect anyone to write the code for me but some pointers would be greatly appreciated.

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• How to post SEO jobs in the right way and other questions [closed]

  - by mdivk

  I have websites that needs an SEO expert to make them on the top of Google searching result based on some keywords, or at least the first page, the websites are created using common open source platforms (wp, joomla, or magento, zencart) I want to post a job on oDesk but I have no idea on how this particular type of requirement works? what would the guy do on my website? will I be asked to spent extra advertisement money? How do I know s/he really did anything on my site and what have been done? if it's just to optimize URL to make it meaningful then I don't need that, and I am sure giving every page's URL an alias is not enough to make the site popular. Beside, I want to know how much it roughly costs and how long it takes. It would be great if you can shed me some light, thank you in advance.

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• Double equals (Not equality) during assigning Java

  - by FabianCook

  When I tried searching this I would just get things on equality. When I was reading through some documentation for navigation in Android I had come across something I had never seen before. I came across this: mTitle = mDrawerTitle = getTitle(); It almost looks like something you can do in JavaScript where you can take the first not-null variable and assign it to a variable. In JavaScript I would do this: mTitle = mDrawerTitle || getTitle(); And it would return the first not null, in Java, is this double equals usage the equivalent in Java? What is this type of expression called?

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• In setting up dual Boot with Windows XP and Ubuntu, which OS do I install first?

  - by markl

  I'd like to install both Ubuntu 12.04 and Windows XP on a Dell laptop, and I was thinking about using a dual boot structure, and using the bulk of my hard drive as empty hard drive space to share files between the two operating systems (so choice of file system type is very important in this set-up). The kind of partitioning structure I would like to use is Partition 1 - Ubuntu 12.04 (root) (20GB) Partition 2 - Ubuntu /home (20GB) Partition 3 : Free Space (560GB) Partition 4 : Windows XP (35GB) Partition 5 : SWAP (3GB) (Total Hardrive Capacity is ~640GB) My question is; what is the best way to go about setting up this kind this system? Should I install Windows XP first and setup the partitions, and then install Ubuntu which I believe will install the GRUB bootloader for OS booting choice or Do I install Ubuntu first, setting up the available partitions and then perform a WIndows install? Please let me know if there is anything in this setup that I have left out and should know about, including things related to setting particular partitions as logical or primary, and whether the boot partition and the filesystem partition should actually be two separate partitions.

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• Websockets VS SSE

  - by user3385828

  Sorry for asking this here, I bet it has been asked plenty of times before but this time it's something specific which I haven't understood anywhere else: Suppose I have a service which requires to seek the database for different data once and in a while. For this I have 2 or 3 SSE, each one with a different retry basetime (20000 miliseconds, 1000 miliseconds...). What I'd like to know is if websockets can handle different "data type" accordingly to the request, for example, could I create one websocket to handle a notification system, a chat system, a group system instead of separated SSEs and treat data differently with javascript? And if so, would it be of higher interest (performance) than actually performing different queries to the server through different SSEs?

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• chrubuntu installation help

  - by Sir_Yoshi

  my friend loaned me his Acer c720 in order to load ubuntu on it. I have previously liberated my netbook and UMPC with Ubuntu but those where normal windows PCs. I have followed all the steps so far in order to enter developer mode yet at the login screen, when I type ctrl+alt+= (F2) nothing happens. the terminal should open up but it does not. Please help me, my friend bought this craptop but does not have wi-fi thus rendering it useless. P.S. how do you right click without an external mouse?

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• URL Encryption vs. Encoding

  - by hozza

  At the moment non/semi sensitive information is sent from one page to another via GET on our web application. Such as user ID or page number requested etc. Sometimes slightly more sensitive information is passed such as account type, user privileges etc. We currently use base64_encode() and base64_decode() just to de-humanise the information so the end user is not concerned. Is it good practice or common place for a URL GET to be encrypted rather than simply PHP base64_encoded? Perhaps using something like, this: $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key)))); $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($encrypted), MCRYPT_MODE_CBC, md5(md5($key))), "\0"); Is this too much or too power hungry for something as common as the URL GET.

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• f12 and ctrl + f5 not working correctly [migrated]

  - by ComatoseDuck

  When I came back to my work computer after being away for a week I found out when I try to clear the cache and refresh the page via ctrl + f5 (or just f5) I get the prompt "Type the Internet address of a document, and Internet Explorer will open it for you" with a drop down list in IE. When I try f5 in Chrome and FF it opens the "Open file" dialog box. When I try to f12 for Dev tools in IE, Chrome & FF it opens up the print dialog box. Why is this happening and what can I do to revert it back to the way it was?

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• Why does Linq to Entity Sum return null when the list is empty?

  - by Hannele

  There are quite a few questions on Stack Overflow about the Linq to Entity / Linq to SQL Sum extension method, about how it returns null when the result set is empty: 1, 2, 3, 4, 5, 6, 7, and many more, as well as a blog post discussing the issue here. Now, I could go a flag these as duplicates, but I feel it is still an inconsistency in the Linq implementation. I am assuming at this point that it is not a bug, but is more or less working as designed. I understand that there are workarounds (for example, casting the field to a nullable type, so you can coalesce with ??), and I also understand that for the underlying SQL, a NULL result is expected for an empty list. But because the result of the Sum extension for nullable types is also not nullable, why would the Linq to SQL / Linq to Entity Sum have been designed to behave this way?

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• Syanptics Touchpad Won't Re-enable

  - by user71607

  I disabled my Synaptics touchpad while a key on my keyboard and now I can't get it to work again. When I press that key again it says the touchpad turns back on but will not work at all. Rebooting doesn't help, and I tried installing touchpad-indicator but when I try to enable from there it says that it enables, but the icon remains like it's disabled. The odd thing is that it works on the lock screen so I know the drivers aren't messed up, it's just a setting. Also, the touchpad works on guest mode but still nothing on my account. I tried using gconf to set the touchpad_enable to true and it worked, it sure set it. Doesn't make a difference though, my touchpad is still useless. Terminal commands I've used: gconftool-2 --set --type boolean /desktop/gnome/peripherals/touchpad/touchpad_enabled true synclient Touchpadoff=0 modprobe psmouse

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• What are some ways you use VS2010 Toolbox to be more productive?

  - by emragins

  I just saw a presenter who had pre-loaded a large number of code snippets into the Toolbox so that he could pull them into the presentation rather than trying to re-type code on the spot (or have it already integrated and trying to comment/uncomment/etc.) This seemed like an extremely effective use. It got me thinking, though, that perhaps the Toolbox is far more powerful than I've ever considered, but a couple quick google searches didn't yield what I was looking for. What are some other uses of the Toolbox that could help in productivity which may or may not be obvious?

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• (SYSLINUX QUESTION) How to launch command prompt once syslinux boots up

  - by user1294023

  I have created a bootable USB drive using SYSLINUX I am booting my x86 system correctly. Once system boots I want to stop at console (command prompt) where I can type linux commands (cd etc) and run my executable file manually. Does that mean I have to have busy box installed (for basic commands). What makes system stop at command prompt? I do have /dev/console. My serial console is tty1. Any help is appreciated. #syslinux.cfg serial 0 9600 default MyProgram prompt 1 label Linux display message.msg timeout 100 kernel bzImage append console=tty1,9600 vga=773 initrd initrd.img

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• Application window as polygon texture?

  - by nekome

  Is there a way, or method, to have some application rendered as texture in 3D scene on some polygon, and also have full interactivity with it? I'm talking about Windows platform, and maybe OpenGL but I guess it doesn't matter is it OGL or DX. For example: I run Calculator using WINAPI functions (preferably hidden, not showing on desktop) and I want to render it inside 3D scene on some polygon but still be able to type or click buttons and have it respond. My idea to realize this is to have WINAPI take screenshot (or render it to memory if possible) of that Calculator and pass it to OpenGL as texture for each frame (I'm experimenting with SDL through pygame) and for mouse interactivity to use coordination translation and calculate where on application window it would act, and then use WINAPI functions such as SetCursorPos to set cursor ant others to simulate click or something else. I haven't found any tutorials with topic similar to this one. Am I on a right track? Is there better way to do this if possible at all?

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• Color based collision detection

  - by user1486826

  I am making a game where you fly a ship around some randomly generated planets. Since I am using a for loop to draw over 5000 planets, using the rectangle class or an oval-type class for this is not an option, since creating many objects will severely affect performance. Bitmasking each planet will likely result in performance issues too, so the only candidate is color based collision detection, because I don't need to apply some sort of object to everything I want to check for collisions. Is any way to check the perimeter around the ship for a certain color?

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• How to Create a Powerful Website That Sells Today?

  If you are trying to make money online, you simply must have a well designed website. When it comes to designing their websites, many internet marketers think very short term and do a low quality rush job. Putting up a cheap or cookie cutter type website will not bring you the online success that you desire. Whatever time it takes to make an attractive website that is appealing to visitors should be considered a necessary investment in your future success. Some people think it's very hard or that you have to be some kind of technical genius to make a good website; thankfully, this isn't the case.

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• Problems increasing root size

  - by user212866

  I'm running out of space, so I tried to increase root size using this link: Increase size of root partition after installing Ubuntu in Windows Here is the output Filesystem Type Size Used Avail Use% Mounted on /dev/sda7 ext4 6,2G 5,6G 308M 95% / udev devtmpfs 965M 4,0K 965M 1% /dev tmpfs tmpfs 389M 892K 388M 1% /run none tmpfs 5,0M 4,0K 5,0M 1% /run/lock none tmpfs 972M 440K 971M 1% /run/shm /dev/sda5 fuseblk 12G 6,1G 5,8G 52% /media/Ubuntu /dev/sda2 fuseblk 278G 260G 19G 94% /media/AC4CC70D4CC6D16E I tried to allocate 16Gb in the host (/dev/sda2 which is windows 7 partition). When I get to the \ubuntu\disks folder, I only get the "new.disk" file which weighs the 16Gb allocated and not the "root.disk" file too. Also, the /dev/sda7 size doesn't increase. Could you please help me? Many thanks

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• Des chercheurs dévoilent un processeur à 1000 coeurs intégrés dans une seule puce aux circuits configurables

  Des chercheurs dévoilent un processeur à 1000 coeurs Intégrés dans une seule puce aux circuits configurables Des chercheurs de l'Université de Glascow en Ecosse viennent de dévoiler une prouesse technologique. Alors que les constructeurs multiplient le nombre de coeurs dans leurs processeurs, participant à la démocratisation de la programmation parallèle, le Dr Wim Vanderbauwhede et son équipe, en collaboration avec l'Université du Massachusetts, ont tenté de pousser l'expérience encore plus loin en créant de multiples unités de calculs indépendantes au sein d'une même puce. Pour y arriver, ils ont utilisé des puces de type Field Programmable Gate Array (FPGA). Les transis...

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• Pinging/connecting to server.domain.local never works, but server does when the search domain is specified

  - by SuperMatt

  This is a bit of a weird one. I'm running ubuntu on a Windows domain. If I type "ping server" I can ping correctly and I can connect without any problems. It looks up my search domain (domain.local) and everything is hunky dory. Problem is when I try to ping server.domain.local. It just can't look up the server and comes back with "ping: unknown host server.domain.local" Part of me thinks that the name servers aren't set correctly, but I wonder if there is something I can do to get around it.

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• Internships and certification in IT Business Analyst? [closed]

  - by light

  I'm new in this field, I have almost no experience. But I know here many people who do it every day and have many years of experience behind! And I hope they can help me! Generally, I'm interested to know the following: certificates to fully understand technology and to show to employers maybe you know good places to have an internship (country doesn't matter) EDIT #1: question was changed to be more specific. EDIT #2: thanks, I think the question should be closed, because the question depends from my need, what type of work I want to have).

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• La Fondation Mozilla contrainte de payer des impôts alors que l'optimisation fiscale des acteurs commerciaux fait de plus en plus débat

  La Fondation Mozilla contrainte de payer des impôts Alors que l'optimisation fiscale de ses concurrents commerciaux fait de plus en plus débat La morale de l'histoire est assez douteuse. Mais le Business n'est pas histoire de morale, c'est bien connu. D'un côté, la Fondation Mozilla. Organisme à but non lucratif de type associatif, elle a pour but de promouvoir l'ouverture et l'universalité des technologies Web (et mobiles) ainsi que le respect de la vie privée et du choix des utilisateurs. Mozilla vient de se faire « redresser » par le FISC américain et devra payer des taxes sur ses revenus, alors qu'elle les jugeait pour sa part non-imposables, car non commerciaux....

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• How to install aircrack on Ubuntu 12.04

  - by user287903

  I have downloaded the tar.gz package from the site and then I have extracted using tar -zxvf command as mentioned over there. After that I used sudo apt-get install build-essential then I further installed libssl-dev. Then I changed directory to the aircrack folder. But when I type either sudo make or just make I am getting this same error. I don't know what to do. I have installed the file what they have asked in the error as well. Still the same error is shown. Okay I am not permitted to upload images. The error is : common.mak:85: *** Cannot find development files for any supported version of libnl. install either libnl1 or libnl3.. Stop.

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