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  • Is type safety worth the trade-offs?

    - by Prof Plum
    I began coding in in Python primarily where there is no type safety, then moved to C# and Java where there is. I found that I could work a bit more quickly and with less headaches in Python, but then again, my C# and Java apps are at much higher level of complexity so I have never given Python a true stress test I suppose. The Java and C# camps make it sound like without the type safety in place, most people would be running into all sorts of horrible bugs left an right and it would be more trouble than its worth. This is not a language comparison, so please do not address issues like compiled vs interpreted. Is type safety worth the hit to speed of development and flexibilty? WHY? to the people who wanted an example of the opinion that dynamic typing is faster: "Use a dynamically typed language during development. It gives you faster feedback, turn-around time, and development speed." - http://blog.jayway.com/2010/04/14/static-typing-is-the-root-of-all-evil/

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  • Data Source Security Part 5

    - by Steve Felts
    If you read through the first four parts of this series on data source security, you should be an expert on this focus area.  There is one more small topic to cover related to WebLogic Resource permissions.  After that comes the test, I mean example, to see with a real set of configuration parameters what the results are with some concrete values. WebLogic Resource Permissions All of the discussion so far has been about database credentials that are (eventually) used on the database side.  WLS has resource credentials to control what WLS users are allowed to access JDBC resources.  These can be defined on the Policies tab on the Security tab associated with the data source.  There are four permissions: “reserve” (get a new connection), “admin”, “shrink”, and reset (plus the all-inclusive “ALL”); we will focus on “reserve” here because we are talking about getting connections.  By default, JDBC resource permissions are completely open – anyone can do anything.  As soon as you add one policy for a permission, then all other users are restricted.  For example, if I add a policy so that “weblogic” can reserve a connection, then all other users will fail to reserve connections unless they are also explicitly added.  The validation is done for WLS user credentials only, not database user credentials.  Configuration of resources in general is described at “Create policies for resource instances” http://docs.oracle.com/cd/E24329_01/apirefs.1211/e24401/taskhelp/security/CreatePoliciesForResourceInstances.html.  This feature can be very useful to restrict what code and users can get to your database. There are the three use cases: API Use database credentials User for permission checking getConnection() True or false Current WLS user getConnection(user,password) False User/password from API getConnection(user,password) True Current WLS user If a simple getConnection() is used or database credentials are enabled, the current user that is authenticated to the WLS system is checked. If database credentials are not enabled, then the user and password on the API are used. Example The following is an actual example of the interactions between identity-based-connection-pooling-enabled, oracle-proxy-session, and use-database-credentials. On the database side, the following objects are configured.- Database users scott; jdbcqa; jdbcqa3- Permission for proxy: alter user jdbcqa3 grant connect through jdbcqa;- Permission for proxy: alter user jdbcqa grant connect through jdbcqa; The following WebLogic Data Source objects are configured.- Users weblogic, wluser- Credential mapping “weblogic” to “scott”- Credential mapping "wluser" to "jdbcqa3"- Data source descriptor configured with user “jdbcqa”- All tests are run with Set Client ID set to true (more about that below).- All tests are run with oracle-proxy-session set to false (more about that below). The test program:- Runs in servlet- Authenticates to WLS as user “weblogic” Use DB Credentials Identity based getConnection(scott,***) getConnection(weblogic,***) getConnection(jdbcqa3,***) getConnection()  true  true Identity scottClient weblogicProxy null weblogic fails - not a db user User jdbcqa3Client weblogicProxy null Default user jdbcqaClient weblogicProxy null  false  true scott fails - not a WLS user User scottClient scottProxy null jdbcqa3 fails - not a WLS user User scottClient scottProxy null  true  false Proxy for scott fails weblogic fails - not a db user User jdbcqa3Client weblogicProxy jdbcqa Default user jdbcqaClient weblogicProxy null  false  false scott fails - not a WLS user Default user jdbcqaClient scottProxy null jdbcqa3 fails - not a WLS user Default user jdbcqaClient scottProxy null If Set Client ID is set to false, all cases would have Client set to null. If this was not an Oracle thin driver, the one case with the non-null Proxy in the above table would throw an exception because proxy session is only supported, implicitly or explicitly, with the Oracle thin driver. When oracle-proxy-session is set to true, the only cases that will pass (with a proxy of "jdbcqa") are the following.1. Setting use-database-credentials to true and doing getConnection(jdbcqa3,…) or getConnection().2. Setting use-database-credentials to false and doing getConnection(wluser, …) or getConnection(). Summary There are many options to choose from for data source security.  Considerations include the number and volatility of WLS and Database users, the granularity of data access, the depth of the security identity (property on the connection or a real user), performance, coordination of various components in the software stack, and driver capabilities.  Now that you have the big picture (remember that table in part 1), you can make a more informed choice.

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  • Allow any arguments for a given command with sudo

    - by Mark L
    I have the following sudo config entry which I added via sudo visudo: mark ALL = NOPASSWD: /usr/bin/lxc-ls* I can run lxc-ls with my user fine but I can't append any parameters without it demanding I prefix the command with sudo. $ whoami mark $ lxc-ls test-container $ lxc-ls --fancy lxc-ls: error: You must be root to access advanced container properties. Try running: sudo /usr/bin/lxc-ls Any idea how I can edit via sudo visudo to allow for any argument after the command? I don't want to prefix the command with sudo as I'm using a python library to execute the command and it's being funny about sudo prefixes.

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  • Server 2012R2 – PowerShell Web Access

    - by Waclaw Chrabaszcz
    Originally posted on: http://geekswithblogs.net/Wchrabaszcz/archive/2014/05/17/server-2012r2--powershell-web-access.aspxHaha … Sometimes I'm joking that there is nothing worse than Linux fanboi imprisoned in Windows engineer's body. Maybe someday I will start blogging about my noob's experiences. However let's stick to the point. Sometimes the easiest solutions are the best. After couple of tries how to reach left pocket using right hand I'm going to follow easy path. Today's plan is very easy, I'm going to take advantage of Server 2012 and install Web gateway to PowerShell console. After that I would be able execute PoSH from any device including Linux. Install-WindowsFeature –Name WindowsPowerShellWebAccess –IncludeManagementToolsInstall-PswaWebApplication –UseTestCertificateAdd-PswaAuthorizationRule –UserName * -ComputerName * -ConfigurationName *  Let's test it …

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  • Online iPad 1&2 emulators give different results compared to the real thing

    - by Systembolaget
    I'm designing a centered website (jQuery Isotope). Thre sandbox is here. I have used some online iPad 1&2 emulators to test how the site is viewed on these devices. Then, I managed to get hold of the real thing. Result: on real iPads, the site is centered and the layout adjusts automatically as expected. In online iPad emulators, the site is not quite centered and additional Isotope elements are squeezed in. Of course, I trust the real thing more than online emulators, but why is this happening? To me, it feels like website testing with online emulators is not so reliable after all? If this question is wrong here, please move it or tell me where it should go. SO is about programming, this question isn't. Thanks!

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  • To same computer Remote desktop thrue WRT54G router

    - by Kangarooo
    Cant access from my Same comp same comp to test if all is ok. Tryd all mentioned posibilities. Tryd my ip xxx.xxx.xxx.xxx / localhost with / without :5900 added with / without in "Remote desktop" checked "Configure network automatically to accept connection" with / without in router WRT54G enabled port 5900 forwardet to my comp 192.168.1.3 UPNP is enabled. I can connect to one other comp witch isnt using router and checked "Configure network automatically to accept connection" and to one thrue TENDA W311R+ router where ive put port forwarding to 5900 and there works xxx.xxx.xxx.xxx:5900 Whats wrong? What ive missed?

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  • WebLogic Application Server: free for developers!

    - by Bruno.Borges
    Great news! Oracle WebLogic Server is now free for developers! What does this mean for you? That you as a developer are permited to: "[...] deploy the programs only on your single developer desktop computer (of any type, including physical, virtual or remote virtual), to be used and accessed by only (1) named developer." But the most interesting part of the license change is this one: "You may continue to develop, test, prototype and demonstrate your application with the programs under this license after you have deployed the application for any internal data processing, commercial or production purposes" (Read the full license agreement here) If you want to take advantage of this licensing change and start developing Java EE applications with the #1 Application Server in the world, read now the previous post, How To Install WebLogic Zip on Linux!

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  • How to prevent WLAN connection from dropping permanently?

    - by Chris
    I have a desktop with a Fritz USB WLAN N stick and tried Ubuntu 12.04. Installation went fine and WLAN is working. However, connection drops permanent. Reconnecting manually fixes it but after a few minutes it drops again. It's connected to a Vodafone 802 box with WLAN N fix set. It seems that it works when I switch off N mode. But I need to test. Can someone confirm this issue or is there another solution? I have another machine with 12.04 (HP 625 laptop) running where connection is stable.

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  • Why is Lubuntu default desktop environment

    - by John
    So I just wanted to try things out on 14.04, so I did sudo apt-get install lxde sudo apt-get install lubuntu-desktop When I get to the greeter, it reads Lubuntu (Default) Lubuntu Netbook LXDE Openbox Ubuntu Why is Lubuntu default? I don't know if its because its the last thing I installed or if its because it is in alphabetical order. I'm tempted to test this theory by installing Xubuntu and see if it becomes default. I'd like it to read Ubuntu (Default) and have the Ubuntu splash instead. When I open lightdm.conf, there is no line "user-session" nor "greeter-session". They are missing. Is this normal and I have to add it manually?

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  • Game testing on Android - emulator or real devices?

    - by n00bfuscator
    I am working at a localization agency and we have been approached by a client about testing their games on iOS as well as Android. Testing on iOS seems fairly easy as we can just buy a couple of devices and we should be covered. For Android it seems to be completely different. From what i found, the emulator can cover all API levels, screen sizes and such, but i hear it's buggy and nothing could replace testing on real devices. With the vast amount of Android devices out there and the rate at which new devices are released it seems impossible to keep up. How can i test games (localization and functional) on Android covering all compatible devices?

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  • BI Applications Mobile Demonstration

    - by Mike.Hallett(at)Oracle-BI&EPM
    Partners can now run live interactive Demos of the latest version of OBI Mobile on an iPad, and BI Applications have also been made available via OBI mobile app Demos including; Financials, HR, Marketing, Procurement & Spend, Projects and Supply chain.  You can download Demo Scripts for these: e.g. Mobile_Marketing_Analytics.pdf The mobile app is using the same dashboards and data as the BI Applications Test Drives, which partners can access here. These existing demo scripts for these BI Applications can be used with the BI mobile app.  The instructions regarding the interface will be different, but the story line is the same.  If you want the “Mobile Financial Analytics” script ask me @ [email protected] For more instructions on setting up and connecting your iPad, see: Run Live OBI Mobile HD Demos on your iPad Business doesn't stop just because you're on the go. See how Oracle BI Mobile makes consuming BI on the go simple, secure and fast.  

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  • Ubuntu 12.10 - VirtualBox not sharing internet with guest system

    - by Fernando Briano
    I went from ArchLinux to Ubuntu on my dev box. I use VirtualBox to test web sites on Windows and IE. I have my Windows 7 VirtualBox image running on Ubuntu's VirtualBox. Back with ArchLinux, internet worked "out of the box" on the Windows boxes. I left the default options on the box's Network Options (NAT). The Windows machine shows as "connected to ethernet" but reports: The dns server isn't responding So I can't access Internet from there. I tried searching for Ubuntu's official docs but they seem pretty outdated. I tried using my old boxes from Arch (which boot normally but have no internet) and creating a new box from Ubuntu itself, but still get the same results. Update: I'm using VirtualBox 4.1.18 from Ubuntu's repository (apt-get install virtualbox).

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  • Second display is rotated

    - by pram
    I've just updated to Ubuntu 12.10 last night. When I was at the office, I connected my laptop with a projector. Although it can detect the projector, it incorrectly set the projector portrait. Also, if I click the Rotation dropdown, it has no Normal option. It only offered Anticlockwise and Clockwise options. Ofcourse the projector would display my desktop 90 degrees clockwise/anticlockwise. I've just test my laptop again with an LCD monitor, and it happened again. Below is my screenshot for display settings. My display adapter is Intel GMA 950. How to fix this problem?

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  • Skype webcam not working in 12.04

    - by To Do
    I have a logitech quickcam messenger that was working fine until I upgraded to Ubuntu 12.04. I had to use preload v4l hack but since then it always worked for three consecutive ubuntu versions. Now, when I start the webcam during a call, it works for a few seconds, then it freezes, sortof resets and starts updating the image every 5 seconds, like a slide show. If I go to options and test the video it works fine. The webcam works fine as well with google talk. Does anybody have the same problem?

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  • Quels signes permettent de déceler un candidat talentueux ? Un développeur propose cinq indices permettant une embauche directe

    Quels signes permettent de déceler un candidat talentueux ? Un développeur propose cinq indices permettant une embauche directe Le processus de recrutement passe toujours par une étape d'entretien, permettant un premier contact entre le candidat et l'entreprise. Cette phase de questions/réponses ou de test peut permettre souvent de déceler chez le candidat des caractéristiques impressionnantes, pouvant aboutir directement à une proposition d'emploi. Dans le secteur du développement informatique, quels sont les signes permettant d'identifier une perle rare ? C'est la question à laquelle répond Brian Kelly, un développeur senior, de par son expérience en la matière, qui propo...

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  • Setting folder to be writable by apache/php in windows?

    - by Chris Sobolewski
    I have a local test server, and I am attempting to write a file with PHP. I am getting a message that the folder (../uploads/) does not exist or I do not have permission. My directory structure is D:\xampp\htdocs\website\ //<--root D:\xampp\htdocs\website\library //<--where script runs D:\xampp\htdocs\website\uploads //<--where I'd like to save I know on a *nix server, I can just chmod the permission to 0777. What do I need to set on my windows box to give apache the ability to write a file?

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  • Can not update Natty running from a USB stick

    - by Ingo Gerth
    In a blogpost Jono explained a nice way to test the latest version of Natty. Under point four he proposes: Step 4: Update Although you installed the latest daily you should ensure it is up to date, and you can do this with: sudo apt-get update sudo apt-get upgrade Now, I followed all the steps and am actually writing this question from a session running on a 4GB USB stick. When trying to update the installation though (I just tried to do that using the Update Manager), it always fails because I do not have enough disc space remaining. How can I get Ubuntu to update properly on my USB stick?

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  • Cannot use broadband in Kubuntu

    - by Amanz Linux
    I have 5 months of experience using ubuntu 10:10. And it is clear it is suitable for broadband use. For Kubuntu, I have thoroughly tried everything available, using the 10:10 Kubuntu CD that I have had for the last week. It is very appealing, but in the meantime I am unable to use broadband in Kubuntu. I've tried and tried, thinking that it was possible that the use of broadband in Kubuntu was the same as in Ubuntu, so I have attempted to use broadband just as I used it in ubuntu. But I have failed to successfully test the broadband. Kubuntu was much different from ubuntu. Can anyone help me solve this problem?

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  • How to handle loading and keeping many bitmaps in an Android 2D game

    - by Lumis
    In an Android 2D game which is using SurfaceView where its onDraw is driven by a loop from a Thread, I use many bitmap sprites (sprite sheets) and two background size bitmaps, which are all loaded into memory at the start. It all works fine, however, when the activity is onPause or after reloading it few times, Android shows a tendency to wipe out the big bitmaps only, probably to free memory. Sometimes this happens even in the middle of loading this very activity. In order to counter this, I made a check in the onDraw method to test if the big bitmaps are still there and reload them if they are forcefully recycled by Android, before drawing them on Canvas. This solution may not be the most stable, and since I know that there are much more accomplished android game programmers here than myself, I hope you can reveal some tricks or secrets or at least provide some good hints, how to overcome this.

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  • UIView with IrrlichtScene - iOS

    - by user1459024
    i have a UIViewController in a Storyboard and want to draw a IrrlichtScene in this View Controller. My Code: WWSViewController.h #import <UIKit/UIKit.h> @interface WWSViewController : UIViewController { IBOutlet UILabel *errorLabel; } @end WWSViewController.mm #import "WWSViewController.h" #include "../../ressources/irrlicht/include/irrlicht.h" using namespace irr; using namespace core; using namespace scene; using namespace video; using namespace io; using namespace gui; @interface WWSViewController () @end @implementation WWSViewController -(void)awakeFromNib { errorLabel = [[UILabel alloc] init]; errorLabel.text = @""; IrrlichtDevice *device = createDevice( video::EDT_OGLES1, dimension2d<u32>(640, 480), 16, false, false, false, 0); /* Set the caption of the window to some nice text. Note that there is an 'L' in front of the string. The Irrlicht Engine uses wide character strings when displaying text. */ device->setWindowCaption(L"Hello World! - Irrlicht Engine Demo"); /* Get a pointer to the VideoDriver, the SceneManager and the graphical user interface environment, so that we do not always have to write device->getVideoDriver(), device->getSceneManager(), or device->getGUIEnvironment(). */ IVideoDriver* driver = device->getVideoDriver(); ISceneManager* smgr = device->getSceneManager(); IGUIEnvironment* guienv = device->getGUIEnvironment(); /* We add a hello world label to the window, using the GUI environment. The text is placed at the position (10,10) as top left corner and (260,22) as lower right corner. */ guienv->addStaticText(L"Hello World! This is the Irrlicht Software renderer!", rect<s32>(10,10,260,22), true); /* To show something interesting, we load a Quake 2 model and display it. We only have to get the Mesh from the Scene Manager with getMesh() and add a SceneNode to display the mesh with addAnimatedMeshSceneNode(). We check the return value of getMesh() to become aware of loading problems and other errors. Instead of writing the filename sydney.md2, it would also be possible to load a Maya object file (.obj), a complete Quake3 map (.bsp) or any other supported file format. By the way, that cool Quake 2 model called sydney was modelled by Brian Collins. */ IAnimatedMesh* mesh = smgr->getMesh("/Users/dbocksteger/Desktop/test/media/sydney.md2"); if (!mesh) { device->drop(); if (!errorLabel) { errorLabel = [[UILabel alloc] init]; } errorLabel.text = @"Konnte Mesh nicht laden."; return; } IAnimatedMeshSceneNode* node = smgr->addAnimatedMeshSceneNode( mesh ); /* To let the mesh look a little bit nicer, we change its material. We disable lighting because we do not have a dynamic light in here, and the mesh would be totally black otherwise. Then we set the frame loop, such that the predefined STAND animation is used. And last, we apply a texture to the mesh. Without it the mesh would be drawn using only a color. */ if (node) { node->setMaterialFlag(EMF_LIGHTING, false); node->setMD2Animation(scene::EMAT_STAND); node->setMaterialTexture( 0, driver->getTexture("/Users/dbocksteger/Desktop/test/media/sydney.bmp") ); } /* To look at the mesh, we place a camera into 3d space at the position (0, 30, -40). The camera looks from there to (0,5,0), which is approximately the place where our md2 model is. */ smgr->addCameraSceneNode(0, vector3df(0,30,-40), vector3df(0,5,0)); /* Ok, now we have set up the scene, lets draw everything: We run the device in a while() loop, until the device does not want to run any more. This would be when the user closes the window or presses ALT+F4 (or whatever keycode closes a window). */ while(device->run()) { /* Anything can be drawn between a beginScene() and an endScene() call. The beginScene() call clears the screen with a color and the depth buffer, if desired. Then we let the Scene Manager and the GUI Environment draw their content. With the endScene() call everything is presented on the screen. */ driver->beginScene(true, true, SColor(255,100,101,140)); smgr->drawAll(); guienv->drawAll(); driver->endScene(); } /* After we are done with the render loop, we have to delete the Irrlicht Device created before with createDevice(). In the Irrlicht Engine, you have to delete all objects you created with a method or function which starts with 'create'. The object is simply deleted by calling ->drop(). See the documentation at irr::IReferenceCounted::drop() for more information. */ device->drop(); } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } @end Sadly the result is just a black View in the Simulator. :( Hope here is anyone who can explain me how i draw the scene in a UIView. Furthermore I'm getting this Error: Could not load sprite bank because the file does not exist: #DefaultFont How can i fix it ?

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  • Reminder: Oracle Solaris 11 Beta Exam Ending Soon!

    - by Paul Sorensen
    Just a quick reminder that the beta exam for the new "Oracle Certified Associate, Oracle Solaris 11 System Administrator" certification will be ending on April 28th. I'd like to invite anyone that has held off on becoming certified to consider taking beta exam. Participating in our Oracle's certification beta exams is a very inexpensive way to get certified, and you can be one of the first few people to become certified on Oracle Solaris 11. Please note that in order to earn your Oracle Solaris 11 OCA you are not required to attend a course from Oracle (of course you pass the test).Quick Links: Beta Exam: Oracle Solaris 11 System Administration (1Z1-821) Certification Track: Oracle Certified Associate, Oracle Solaris 11 System Administrator Certification Website: About Beta Exams Register Now: Pearson VUE

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  • is bumblebee supposed to be a "seamless" implementation?

    - by broiyan
    It is said that bumblebee is used to make Nvidia Optimus work on linux. The wikipedia Optimus description says that The switching is designed to be completely seamless and to happen "behind the scenes". However, after installing bumblebee, the recommended test seems to be to compare the operation of glxspheres with the operation of optirun glxspheres. The latter is faster than the former. If the switching is supposed to be seamless, why do we optirun to speed up graphics? Shouldn't it be automatic?

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  • View Frustum Alternative

    - by Kuros
    I am working on a simulation project that requires me to have entities walking around in a 3D world. I have all that working, matrix transformations, etc. I'm at the point where I need what is essentially a view frustum, so I can give each entity a visible area. However, when looking over the calculations required to do it, it seems like a perspective frustum is only required to be able to project it onto a 2D screen. Is there another, easier to code solution, that would function better, such as an orthogonal perspective? Could I just define a shape mathematically and test wether the coordinates of the objects are inside or out? I am not really a 3D coder (and I am doing this all from scratch, not using an engine or anything), so I would like the simplest solution possible for my needs. Thank you!

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  • Cannot read from 2nd SATA data drive connected via SATA docking station

    - by Robbo
    Installed 10.10 this week on dual boot system. Everything else works fine but cannot read from 2nd SATA drive with all my data. Same drive works normally when booted to Windows XP. Interesting part is that I can see the drive in Ubuntu Disk Manager, can read all its attributes, can test it, shows up in Disk Manager, Storage Device Manager and Mount Manager, and can mount it, even change attributes; it appears healthy but does not show up in "Computer" or anywhere else that it can be accessed. The drive is connected via an external e-SATA docking station which is connected to a SATA port on the motherboard.

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  • If an app runs well on iPhone 3GS with iOS 5.1, how to know that it runs well on iOS 4.3? [closed]

    - by ????
    I bought an iPhone 3GS just to test backward compatibility of apps that I developed, but it arrived preinstalled with iOS 5.1. So even if an app runs well on iPhone 3GS and iOS 5.1 with its hardware limitation, how can we tell that it runs well even on iPhone 3GS with iOS 4.3? Will it actually be better to install iOS 4.3 on the phone so that we know even the older iOS can support it, so the newer iOS will work well supposedly? Or is there a need to buy yet another iPhone 3GS and install 4.3 on one and 5.1 on the other? (my assumption is that if we set the app's build target iOS to 4.3, the iPhone 3G won't be able to install it, because iPhone 3G only runs iOS up to 4.2. So the target device is 3GS but not earlier. But it will exclude iPod Touch 2nd Generation as well because they also can only support iOS up to 4.2 only)

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