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• Win Server 2008 R2 SP1 Repair Disk

  - by Horst Walter

  Is there nothing like "creating a repair disk" for Win Server 2008 R2 SP1. Or am I just missing it? Under Win7 I do just enter "Repair" and it finds "create a repair disk". Sorry - but I am not a professional Admin. Just using the server for my development environment. If there is no repair disk, is there something similar or something I should create in case I do have a system failure? Sure, a full backup is done, but anything else?

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• Laptop using 14.04 won't get past login GUI

  - by Dave M G

  My laptop was working perfectly yesterday, and now today I can't log in. At first, I was only getting a black screen. However, after following instructions in some questions here on AskUbuntu, I first reinstalled lightdm, and then I had to change the ownership of the file ~/.Xauthority to be my user name. Now, I get the log in GUI screen. However, once I enter my username, it flickers and then comes back to the login GUI. It does not matter if I use Gnome, Unity, or Gnome-Flashback. I don't know why lightdm needed to be reconfigured, or how ~/.Xauthority got changed, but in any case, what is still standing in my way, preventing me from logging in? Update: I have tried deleting the .Xauthority file, and the .profile files in my home directory. It has not changed anything. Logging in as guest also fails to work. The following commands did not work: mv ~/.config ~/.config.BAK mv ~/.cache ~/.cache.BAK Inside .xsession-errors in my home directory, it says: Gdk-CRITICAL: gdk_x11_display_get_xdisplay: assertion 'GDK_IS_DISPLAY (display)' failed

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• How to prevent overlapping of gunshot sounds when using fast-firing weapons

  - by G3tinmybelly

  So I am now trying to find sounds for my guns but when I grab a gun sound effect and play it in my game a lot of the sounds are either terrible sounding or have this horrible echoing effect because as a gun shoots sometimes the previous sound is playing still. public void shoot(float x, float y, float direction){ if(empty){ PlayHUD.message = "No more bullets!"; return; } if(reloading){ return; } if(System.currentTimeMillis() - lastShot < fireRate){ //AssetsLoader.lmgSound.stop(); return; } float dx = (float) (-13 * Math.cos(direction) + 75 * Math.sin(direction)); float dy = (float) (-14 * -Math.sin(direction) + 75 * Math.cos(direction)); float dx1 = (float) (-13 * Math.cos(direction) + 75 * Math.sin(direction)); float dy1 = (float) (-14 * -Math.sin(direction) + 75 * Math.cos(direction)); PlayState.effects.add(new MuzzleFlashEffect(x + dx1, y + dy1, (float) Math.toDegrees(-direction))); PlayState.projectiles.add(new Bullet(this, x + dx, y + dy, (float) (direction + (Math.toRadians(MathUtils.random(-accuracy, accuracy)))))); if(OptionState.soundOn){ AssetsLoader.lmgSound.play(OptionState.volume); } bulletsInClip--; lastShot = System.currentTimeMillis(); } Here is the code for where the sound plays. Every time this method is called the sound is called but it happens so often in this case that there is this terrible echoing. Any idea on how to fix this?

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• @staticmethod vs module-level function

  - by darkfeline

  This is not about @staticmethod and @classmethod! I know how staticmethod works. What I want to know is the proper use cases for @staticmethod vs. a module-level function. I've googled this question, and it seems there's some general agreement that module-level functions are preferred over static methods because it's more pythonic. Static methods have the advantage of being bound to its class, which may make sense if only that class uses it. However, in Python functionality is usually organized by module not class, so usually making it a module function makes sense too. Static methods can also be overridden by subclasses, which is an advantage or disadvantage depending on how you look at it. Although, static methods are usually "functionally pure" so overriding it may not be smart, but it may be convenient sometimes (though this may be one of those "convenient, but NEVER DO IT" kind of things only experience can teach you). Are there any general rule-of-thumbs for using either staticmethod or module-level functions? What concrete advantages or disadvantages do they have (e.g. future extension, external extension, readability)? If possible, also provide a case example.

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• Information I need to know as a Java Developer [on hold]

  - by Woy

  I'm a java developer. I'm trying to get more knowledge to become a better programmer. I've listed a number of technologies to learn. Instead of what I've listed, what technologies would you suggest to learn as well for a Junior Java Developer? I realize, there's a lot of things to study. Java: - how a garbage collector works - resource management - network programming - TCP/IP HTTP - transactions, - consistency: interfaces, classes collections, hash codes, algorithms, comp. complexity concurrent programming: synchronizing, semafores steam management metability: thread-safety byte code manipulations, reflections, Aspect-Oriented Programming as base to understand frameworks such as Spring etc. Web stack: servlets, filters, socket programming Libraries: JDK, GWT, Apache Commons, Joda-Time, Dependency Injections: Spring, Nano Tools: IDE: very good knowledge - debugger - profiler - web analyzers: Wireshark, firebugs - unit testing SQL/Databases: Basics SELECTing columns from a table Aggregates Part 1: COUNT, SUM, MAX/MIN Aggregates Part 2: DISTINCT, GROUP BY, HAVING + Intermediate JOINs, ANSI-89 and ANSI-92 syntax + UNION vs UNION ALL x NULL handling: COALESCE & Native NULL handling Subqueries: IN, EXISTS, and inline views Subqueries: Correlated ITH syntax: Subquery Factoring/CTE Views Advanced Topics Functions, Stored Procedures, Packages Pivoting data: CASE & PIVOT syntax Hierarchical Queries Cursors: Implicit and Explicit Triggers Dynamic SQL Materialized Views Query Optimization: Indexes Query Optimization: Explain Plans Query Optimization: Profiling Data Modelling: Normal Forms, 1 through 3 Data Modelling: Primary & Foreign Keys Data Modelling: Table Constraints Data Modelling: Link/Corrollary Tables Full Text Searching XML Isolation Levels Entity Relationship Diagrams (ERDs), Logical and Physical Transactions: COMMIT, ROLLBACK, Error Handling

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• How to choose NoSQL database engine?

  - by Poma

  We have a database with following specs: 30k records, 7mb in size 20 inserts/second 1000 updates/second 1000 range selects/second, by secondary index, approx 10 rows each needs at least one secondary index needs some mechanism to expire keys if they are not updated for 75 secs (can be done via programmatic garbage collector but will require additional 'last_update' index and will add some load) consistency is not required durability is not required db should be stored in memory For now we use Redis, but it does not have secondary index and it's keys index:foo:* is too slow. Membase also does not have secondary index (as far as I know). MongoDB and MySQL memory engine have table-level locks. What engine will fit our use case?

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• Google Music Player doesn't work

  - by EricoPF

  I'm trying to log in on Google Music Player application but doesn't work. I get the message below: Login Failed Could not identify your computer. Learn More On Google Help it says that it doesn't run on virtual machines, which is not my case, but I have a virtualbox installed though, and it says some people get to work if they disable their bridge network. The thing is I don't have any bridge interface, even if I remove all virtualbox modules I still get this message. This is my ifconfig output: lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:15374 errors:0 dropped:0 overruns:0 frame:0 TX packets:15374 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1455889 (1.4 MB) TX bytes:1455889 (1.4 MB) wlan0 Link encap:Ethernet HWaddr 94:db:c9:b2:1b:d7 inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::96db:c9ff:feb2:1bd7/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:828467 errors:0 dropped:0 overruns:0 frame:0 TX packets:568040 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1086663025 (1.0 GB) TX bytes:72984931 (72.9 MB) Any ideias ? Thanks guys! Cheers.

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• Motivation for service layer (instead of just copying dlls)?

  - by BornToCode

  I'm creating an application which has 2 different UIs so I'm making it with a service layer which I understood is appropriate for such case. However I found myself just creating web methods for every single method I have in the BL layer, so the services basically built from methods that looks like this: return customers_bl.Get_Customer_Prices(customer_id); I understood that a main point of the service layer is to prevent duplication of code so I asked myself - well, why not just import the BL.dll (and the DAL.dll) to the other UI, and whenever making a change re-copy the dll files, it might not be so 'neat', but is the all purpose of the service layer to prevent this? {I know something is wrong in my approach, I'm probably missing the importance of service layer, I'd like to get more motivation to create another layer, especially because as it is I found that many of my BL functions ALREADY looks like: return customers_dal.Get_Customer_Prices(cust_id) which led me to ask: was it really necessary to create the BL just because on several functions I actually have LOGIC inside the BL?} so I'm looking for more motivation to creating ONE MORE layer, I'm sure it's not just to make it more convenient that I won't have to re-copy the dlls on changes? Am I grasping it wrong? Any simple guidelines on how to design service layer (corresponding to all the BL layer functions or not? any simple example?) any enlightenment on the subject?

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• Laptop won't load an OS or even an OS setup.

  - by Talasan Nicholson

  My fiancé's laptop started to crash and would get BSOD errors to the point that she couldn't even boot up because it would either take forever or just crash. So I figured I'd try to reformat, as it's done this before and this was the solution last time. On Windows 7, it will not go passed the "Setup is starting..." screen. On Windows XP, it crashes once the setup is about to start (BSOD). I shut it down and let it sit for 5+ hours, in case it was overheating, but it's doing the same thing anyway. By now, I figure it's something to do with the hardware but I hope not. Any ideas?

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• What kind of issues would occur if resolve.conf had no dns servers set?

  - by Stuart Woodward

  I want to create a server for a customer and have that customer finish the configuration for themselves. It was been decided that rather than setting default DNS servers (i.e. something like Google's) that the customer should enter the information by themselves. I assume that the customer is technically competent enough to do this. If however they forget or neglect to set this up they might spend some time trying to figure out what is wrong and eventually contact support. (In this case, I think that setting a default might have been better.) Apart from the obvious inability to resolve hosts, what other issues might they face until they have set valid dns servers in resolve.conf?

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• How do I decide what type of programmer I want to be?

  - by Pearsonartphoto

  I've been working at my current work for some time, and I'm considering a bit of a change of careers. I'm trying to decide what it is exactly that I want to do, and I'm really just not sure. I'm not wanting a solution for my particular case, but what I'd like to know are some generalities of things I can look for. Here are some positions that I'm considering, and what my definitions are (I'm probably calling them something other than what is standard, but hopefully this will do for now). I'm looking for quizzes, articles, explanations, or anything that can help me figure this out. Manager - Managing programmers in some sense, mostly in making sure they are kept working. Coder - A person who is told to make a program do XYZ, and makes it do that. Doesn't have to model anything, or come up with formulas. Algorithm Designer - A person who comes up with a way to make software do something, but doesn't necessarily code that program, at least, not in it's final form. QA - A person who tests code for bugs, preferably with the code in hand. Architect - This person figures out how all of the pieces fit together, is a technical manager of sorts. Maintainer - This person takes someone else's existing code, and makes sure it is fixed when issues arise. Also of some note is figuring out what industry I want to work in. Feel free to add any of your own categories.

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• Why doesn't this batch file work for me?

  - by asdfg

  The following batch file is not woking. @echo off python -c "print('echo text')" %TEMP%\test.bat call %TEMP%\test.bat Can anyone help me with this?. edit: I needed unix eval functionality in windows. I could not find a direct way though. So I redirected the eval string to a temporary batch file and executed it. The temporary batch file was successfully created but calling it did not work in the above case. I noticed that any command after the test.bat creation did not work.

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• Syncing Large Directories/Filesystems using USB Drive [closed]

  - by Alan Lue

  Does anyone have a solution for syncing large directories/filesystems using just a USB flash drive (and specifically without using a network connection)? The objective is simply to sync a user directory between two computers. The contents of the user directory could amount to a large quantity of data—say, a quantity larger than could be stored on any single USB drive—but the aggregate size of changes that must be propagated by a single sync could easily fit on a USB drive. As an example, suppose a user directory is already synchronized between a desktop and a laptop computer. Here's a use case: Some changes are made in the user directory on the desktop. We mount a USB drive onto the desktop and copy whatever changes need to be applied to the laptop user directory in order to synchronize the desktop and laptop user directories. We now mount the USB drive onto the laptop and apply the changes. The desktop and laptop user directories are now synchronized. Any ideas? Alan

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• Syncing Large Directories/Filesystems using USB Drive

  - by Alan Lue

  Does anyone have a solution for syncing large directories/filesystems using just a USB flash drive (and specifically without using a network connection)? The objective is simply to sync a user directory between two computers. The contents of the user directory could amount to a large quantity of data—say, a quantity larger than could be stored on any single USB drive—but the aggregate size of changes that must be propagated by a single sync could easily fit on a USB drive. As an example, suppose a user directory is already synchronized between a desktop and a laptop computer. Here's a use case: Some changes are made in the user directory on the desktop. We mount a USB drive onto the desktop and copy whatever changes need to be applied to the laptop user directory in order to synchronize the desktop and laptop user directories. We now mount the USB drive onto the laptop and apply the changes. The desktop and laptop user directories are now synchronized. Any ideas? Alan

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• MVC design patterns

  - by insane-36

  I have an application and it does not use a very good structure. However it seems to me that I have tried to stick to mvc design pattern but a senior engineer claims that I have no design patterns and code are mesh. How I have structured the code : I have couple of nsmanagedobject model classes which represents model in my case and a reskit library which encapsulates the nsurlconnection and url request. I fetch the request from the view controller itself and then when the request get completed I create predicate and then populate it in tableview. Wherever I need custom view either I create it in nib or create in a custom subclass of UIView. I have use delegation pattern and notification to communication to view controller, views and block callback with restkit. But, the senior engineer is very new to ios. He has been doing it for 2 months now but he is a good java programmer. So, what is mvc pattern ? Is core data model not working as a model objects, view controller as controller and views. I dont seem to find any other places or any other cases to create my own model object since the most of the models are used as NSManagedObject subclass.

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• Running Tomcat 7 and Apache 2 on the same server

  - by Thorn

  Part of my site needs to run over HTTPS and I'm creating a sub-domain for that part. I have apache httpd 2 AND Tomcat 7 running on the same server with the same IP, Apache is on port 80 of course, while Tomcat is running on port 8080. Right now I am doing domain forwarding for requests that need to run off tomcat. For example, mathteamhosting.com/mathApp can forward to mathteamhosting.com:8080/mathApp. I would like to have Tomcat handle the https requests for that subdomain. I don't think this forwarding technique can work in this case. How do I set that up so that Tomcat receives the requests on port 443 while apache handles port 80. To be more specific: http://proctinator.com == request goes to Apache web server https://private.proctinator.com == request goes to Apache web server

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• Why does my Visual Studio 2010 default to a horizontal windows split if I quit then reopen it?

  - by Martin Doms

  I use Visual Studio 2010 Professional at work and up until a couple of weeks ago I have had no problems. But now whenever I open an instance of VS 2010 it defaults to horizontal split. I never split my windows horizontally, so this is very annoying. It happens consistently, every time on every project. Here is how VS2010 looked before I closed the window: I close it and reopen in that project, and: Arg! The only plugin I use is ReSharper, in case it's relevant.

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• How can old DOS utilities be incompatible with x64?

  - by Dims

  I found that ARJ.EXE archiver does not run under Windows 7 x64. Bot how can it be? The task of the achiver is to do some very basic file IO. How can it be so? Also I found that apparently no any old command line utility does not run under Windows 7 x64. Also I found that there is no any compatibility option for this case. Is this a very great Microsoft sabotage? Are there any ways to overcome this? Thanks

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• Run Dialog: Tab Key dont complete commands

  - by Gilney

  I like to use the Tab key to complete/skip commands/links in Shells/Browsers when typing. But when I hit the tab key in "Run Dialog" causes focus leave Text box, so i'm forced to leave home keys to use arrow keys. Is there a way change this behavior? Edit: I found here a flag that enables autocomplete in Run Dialog. This doesn't solve the question, but it helps when the command you want is the first option listed, because you just press enter instead of moving to arrow key and select the command. In my case this solves about 80% of cases.

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• Dell XPS M1330 - power cable pulled by accident and now it won't turn on

  - by jim

  I have a similar problem to what has been posted on this site about when I plug in my Laptop adapter the green light comes on as expected; but, when I plug it into the laptop it goes out. In my case, I know it's not the adapter because I have 2 and they both experience the same issue. I'm quite certain the problem is a short in the laptop. I was using the laptop today and the power cord was pulled out by accident and now i'm into this predicament. How or what do I check on the laptop to isolate the problem? Thanks!

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• Route a specific user's traffic via VPN but still allow local networking

  - by wbg

  So, I want to route certain traffic via a VPN connection and the rest via my normal Internet connection. I want to run several different programs and most of them don't support binding to a specific network interface (tun0 in my case). I've managed to send a specific user's traffic via the VPN following the answers given here: iptables - Target to route packet to specific interface? But unfortunately, when I run a server that connects to the Internet and has a web interface running on a local IP (127.0.0.1/192.168.0.*), all the Internet traffic correctly goes via tun0, but I'm unable to connect to the web interface from a local IP as a different user. When I log in as the VPN-ified user, I can access services running on local IPs, but other users/machines can't access any servers I start. Can anyone point me in the right direction?

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• Virtualized Development Server for simulating 3-Tier Environment

  - by chris.cyvas

  Hello, I am thinking about buying a new server based development box for development (redundantly redundant, I know ;)). Ideally, I want to run something like ESXi or Xen Hypervisor at the lowest level. Then I want to add (at least) 5 Linux VM's for the following uses: 2 Web Servers 2 Application Servers 1 Database Server I want to load balance the 2 web servers and the 2 application servers and (somewhat obviously) they need to be all networked together to simulate a production environment. Also, it used to be the case that the recommendation was to put each VM on it's own hard drive, but I'm not sure that holds water anymore. Any advice? Does anyone have any advice on how to pull this off? Gotchya's, LookOuts!, etc? Thanks!

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• OS X: How to create a user account with access to the applications that she has installed only.

  - by pmurillo

  Till now, I've been the sole and proud owner of an iMac. I've always logged in as an administrator and I've also installed a bunch of software following the standard procedure of dragging and dropping it into the Applications folder. This is about to change, as sharing it with a friend makes a lot of sense now that I only have time to use the computer in the mornings, and she can only use it at nights. I thought this was going to be really easy: Just create a user account for her and that's all, I thought. Unfortunately, this is not the case. When she logins into the computer using her username and password, she has access to the same applications I've installed. Even the same applications that I setup to automatically start when I login start for her when she does. How can I setup a user that has only access to the applications that she has installed, but none of the ones installed by other users? Many thanks

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• Apache httpd VirtualHost config - multiple sites

  - by DaFoot

  [Advised to post here from StackExchange] I have a site to work on, because of the way the URLs are built the application seems to have been created on the assumption that it will be at the server root (only app). On my dev server I have other projects and up to now a simple symlink has been working for me, but that's not the case now because this new app wants to sit at the route and process all URLs arriving on :80. Hopefully this snippet from httpd.conf will help explain what I'm trying to acheive: # default for any not matched elsewhere <VirtualHost *:80> ServerName localhost DocumentRoot /var/www/html/newproject </VirtualHost> # now try to pick out specific URLs <VirtualHost localhost/webdev> DocumentRoot /var/www/html/existingProject ServerName localhost/project </VirtualHost> Also need to be able to get same affect from wherever I'm accessing the httpd instance from. Hope that makes sense.

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• CUDA 4.1 Update

  - by N0xus

  I'm currently working on porting a particle system to update on the GPU via the use of CUDA. With CUDA, I've already passed over the required data I need to the GPU and allocated and copied the date via the host. When I build the project, it all runs fine, but when I run it, the project says I need to allocate my h_position pointer. This pointer is my host pointer and is meant to hold the data. I know I need to pass in the current particle position to the required cudaMemcpy call and they are currently stored in a list with a for loop being created and interated for each particle calling the following line of code: m_particleList[i].positionY = m_particleList[i].positionY - (m_particleList[i].velocity * frameTime * 0.001f); My current host side cuda code looks like this: float* h_position; // Your host pointer. This holds the data (I assume it's already filled with the data.) float* d_position; // Your device pointer, we will allocate and fill this float* d_velocity; float* d_time; int threads_per_block = 128; // You should play with this value int blocks = m_maxParticles/threads_per_block + ( (m_maxParticles%threads_per_block)?1:0 ); const int N = 10; size_t size = N * sizeof(float); cudaMalloc( (void**)&d_position, m_maxParticles * sizeof(float) ); cudaMemcpy( d_position, h_position, m_maxParticles * sizeof(float), cudaMemcpyHostToDevice); Both of which were / can be found inside my UpdateParticle() method. I had originally thought it would be a simple case of changing the h_position variable in the cudaMemcpy to m_particleList[i] but then I get the following error: no suitable conversion function from "ParticleSystemClass::ParticleType" to "const void *" exists I've probably messed up somewhere, but could someone please help fix the issues I'm facing. Everything else seems to running fine, it's just when I try to run the program that certain things hit the fan.

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