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  • Spring can commit Transaction in finally block with RunTimeException in try block [migrated]

    - by Chance Lai
    The project used Spring + Hibernate Sample code: public void method(){ try{ dao.saveA(entityA); throw RuntimeException; dao.saveB(entityB); }catch(RuntimeException e){ throw e; }finally{ dao.saveC(entityC) } } Finally, just entityC will be saved in database in test. I think saveA, saveB, saveC in the same transaction,they should not be committed. In this case, I want to know why entityC is committed. How does Spring do this in the finally block?

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  • Problem with the keyboard layout in Emacs (ubuntu 12.04)

    - by user61648
    I've got some problems with the keyboard layout. I have a french AZERTY keyboard. When I switch to another layout (I tested both programmer DVORAK and Greek) everything seems fine. However, in emacs, I have a more unexpected (at least for me) behavior. For example, in DVORAK, I thought to obtain: On my french Keyboard - DVORAK X - Q Alt-X - Alt-Q But I have: X - Q Alt-X - Alt-X When I press the Alt key, the layout change seems to be inactivated. I precise I didn't activated any shortcut containing the Alt key for the layout switching. Moreover, I'm not sure this behavior is restricted to Emacs, but I don't use shortcuts like Alt-... in another application. Is a such behavior normal ? And in this case, how can I use a shortcut like Alt-Q when I switch to DVORAK ?

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  • How do I make Empathy match my keyring with my password?

    - by lisalisa
    I changed my password a few months ago from the password I first used when I installed Ubuntu on my machine. I tried to add a Google Talk account to Empathy, but every time Empathy gives me a message saying the following: Enter password to unlock your login keyring The password you use to log in to your computer no longer matches that of your login keyring. I do not remember my original password and I'm not sure if I should go to Prefrences Passwords and Keys and delete my login password or if there is a way to change the keyring so that it matches up with my current password.

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  • Default User Id at Login different from User Name in Terminal Shell

    - by Bill
    During the Ubuntu 12.04 LTS installation, I was prompted to enter a user name and password, so that a corresponding account could be created and set up for login. I replaced the one that was provided by default (i.e. '70319', which is the Windows 7 admin id) with a user name/id of my choosing. Now, when I turn on the computer, and choose to enter the Ubuntu operating system, the login id that is displayed is 70319 - that is, the one provided by Windows 7. However, when I open up a Unix/Terminal shell, the user id that is displayed at the prompt is the one I entered during installation. Otherwise, the installation of Ubuntu was a success! Is there some way of changing the user id that is displayed at the Login screen, so that it is consistent with the one I entered during installation? If it's any help, I installed Ubuntu using wubi on an ASUS Eee PC 1011PX running Windows 7, and ASUS Express Gate Cloud. Further details regarding the setup/installation can be found at the following link: Installing Ubuntu on an Eee PC 1011PX

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  • GUI Application Resolution from Text Mode OS

    - by brettw
    I'm trying to turn a computer into a Linux thin client via Ubuntu. I have a Dell OptiPlex 755 loaded with Ubuntu 14.04 installed and fully patched. I've configured the OS to run in text mode and automatically launch the VMWare Horizon's client, which works. The issue is that when the Horizon client launches, its resolution is only 1/4 of the screen. I've played with the resolution settings in grub which appears to modify the text environment but not the application environment for Horizon's. Can someone point me in the right direction on how to increase the resolution for a GUI application launch from text mode so it's full screen. Thanks!

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  • How can I find files quicker than find or locate?

    - by Chaitanya
    I have been using find command to find files on my 1 tb hard disk. it takes very long. then I used locate which proved to be faster with regular update using updatedb. But the limitation of locate is that I cannot find files with certain size or modified/created time. can you suggest me any ideas on how to find files at more speed or in that case how to pipe output of locate command in a way that all other information like size, time, etc. can be displayed or redirected to a file.

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  • How to host a simple website using a domain name I own

    - by Cedric Martin
    I'm familiar with hosting webapps when I'm doing "the whole shebang" of installing / configuring / setting up Apache/Tomcat/PostreSQL / "coding" the website myself using HTML / JSP / CSS etc. on dedicated servers I'm renting. But in the above case, I'm "owning" the entire stack: from the Debian GNU/Linux dedicated servers to every single file that is served. Now I'd like to do something much simpler and I must admit I don't know what's involved at all. I'd like to host a simple website made of only a few static pages (no database, no nothing) and I'd like it to be accessible from "example.com". What needs to be technically done to have such a thing? How is the DNS supposed to be set up? Note that I do not want to host this on one of my dedicated servers.

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  • Temporary dimming of desktop in 12.04

    - by deshmukh
    I am running Ubuntu 12.04 (almost default install regularly updated) Unity interface on ASUS X53U (AMD Brazos Dual Core C60 with 2GB RAM). On launching Thunderbird and Firefox, the application dims and the cursor changes to wait mode. In case of Thunderbird, this is most pronounced with the wait time of up to a minute. Memory status checked with free indicates around 500MB of free memory on such occasions. The OS is stable and I can switch to a different work-space, etc. What could this be? Is this something normal?

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  • How do I explain the importance of NUNIT Test cases to my Colleagues [duplicate]

    - by JNL
    This question already has an answer here: How to explain the value of unit testing 6 answers I am currently working in Software Development for applications including lot of Mathematical Calculations. As a result there are lot of test cases that we need to consider. We donot have any NUNIT Test case system, I am wonderring how should I get the advantages of implementing the NUNIT testing in front of my colleagues and my boss. I am pretty sure, it would be of great help for our team. Any help regarding the same, will be higly appreciated.

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  • Unity bar and Menu bar Gone

    - by user121134
    I have a bootable usb stick that has Ubuntu 12.10 on it, so I loaded it onto my computer which is semi old because it was really full and ubuntu is nice software when it works. And all went well until I booted it up the first time and it said that the Compiz thing was missing and I looked that up on the internet and I must have typed 20 different codes into terminal, and nothing seemed to work. Can you please help? I dont know what to do anymore and the only thing I can do it open up terminal because nothing pops up on the screen. Thanks :)

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  • Tips for a first year CS student looking for a summer internship to gain experience?

    - by Matt
    Hello all, I am a first year CS student and my programming experience is only what I have obtained in my computer programming I and II classes this school year. (console applications in C++) I want to find a summer job/internship that would help me build my skill set. Being that I am still such a beginner pay is not a concern, minimum wage would be nice, but as long as I am learning, I really don't care. My current resume just lists a bunch of random jobs i've had in the past (burger king, summer camps, best buy, etc.) Does anyone have any tips (places to look? things to put on resume?) that might help me?

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  • Who owns code if its written by one person with another person directing [on hold]

    - by user136226
    I have an Issue that I need some info on. Basically what Im looking to find out is if I create software,and someone else gives me direction on what they want the software to look like,e.g. an image here,this font of text and it must behave in a certain way. Also some of the code was not developed on my computer and there is no official agreement in place. Not looking to screw anyone over here but need to protect myself if things go sour. Do I own the software or is it jointly owned? Thanks

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  • Difference between ~/folder and /home/username/folder when creating a path in /etc/environment

    - by r0xx4nne
    I had an executable script on my ubuntu located on ~/project/ directory and I tried to add that path to /etc/environment . So , I edit the path to this PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:~/project/" . Then , I logout and login back , open the terminal as su and run the command to execute my script on that folder but the result is command not found. Then, I change the path in /etc/environment to PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/r0xx4nne/project/" and voila it works.Now i can run the executable script inside ~/project/ without fail under su command. My question is , what's the difference between ~/project and /home/r0xx4nne/project when it comes in case of creating a path in /etc/environment ? Why it happened to be like this? I am a newbie and I just want to know more . Thanks for any reply .

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  • Inside the Guts of a DSLR

    - by Jason Fitzpatrick
    It’s safe to assume that there is a lot more going on inside your modern DSLR than your grandfather’s Kodak Brownie, but just how much hardware is packed into the small casing of your average DSLR is quite surprising. Over at iFixit they’ve done a tear down of Nikon’s newest prosumer camera, the Nikon D600. The guts of the DSLR are absolutely bursting with hardware and flat-ribbon cable as seen in the photo above. For a closer look at the individual parts and to see it further torn down, hit up the link below. Nikon D600 Teardown [iFixit via Extreme Tech] 6 Ways Windows 8 Is More Secure Than Windows 7 HTG Explains: Why It’s Good That Your Computer’s RAM Is Full 10 Awesome Improvements For Desktop Users in Windows 8

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  • Caption Competition 3: Caption With a Vengeance

    - by Simple-Talk Editorial Team
    Please to be informing us what might be going on here. Anything faintly computer-themed will always help, but being funny is more important. The one that raises the most chuckles from our team of professional miseryguts’ will win a $50 Amazon voucher. Get entries in before 5 p.m. UK time on the 30th of May to be eligible.  As ever, some suggestions to get you started: He didn’t know how developers kept getting into the server room, but by jove they wouldn’t get out again. Every time you build straight to production, it’s ten minutes with the bees. I know management’s resistant to the cloud, but was burying the IT department this far underground really necessary? After weeks of hunting, a group of highly trained Azure specialists capture the man responsible for branding.

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  • Request Validation in ASP.NET 4.0

    - by Ben Bastiaensen
    Up to ASP.NET 3.5 Request Validation is enabled by default. In order to to disable this for a page you needed to set the ValidationRequest property in the page directive to false. This is no longer the default case in ASP.NET 4.0. If you want to use this behaviour you need to add the follwing setting in web.config  <httpRuntime requestValidationMode="2.0" /> Of course you need to check all input in the page for XSS or other malicious input if you set the pages request validation to false.

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  • Dealing with "I-am-cool-and-you-are-dumb" manager [closed]

    - by Software Guy
    I have been working with a software company for about 6 months now. I like the projects I work on there and I really like all the people there except for 1 guy. That guy is technically smart, and he is a co-founder of the company. He is an okay guy in person (the kind you wouldn't want to care about much) but things get tricky when he is your manager. In general I am all okay but there are times when I feel I am not being treated fairly: He doesn't give much thought to when he makes mistakes and when I do something similar, he is super critical. Recently he went as far as to say "I am not sure if I can trust you with this feature". The detais of this specific case are this: I was working on this feature, and I was already a couple of hours over my normal working hours, and then I decided to stop and continue tomorrow. We use git, and I like to commit changes locally and only push when I feel they are ready. This manager insists that I push all the changes to the central repo (in case my hard drive crashes). So I push the change, and the ticket is marked as "to be tested". Next day I come in, he sits next to me and starts complaining and says that I posted above. I really didn't know what to say, I tried to explain to him that the ticket is still being worked upon but he didn't seem to listen. He interrupts me in-between when I am coding, which I do not mind, but when I do that same, his face turns like this :| and reacts as if his work was super important and I am just wasting his time. He asks me to accumulate all questions, and then ask him altogether which is not always possible, as you need a clarification before you can continue on a feature implementation. And when I am coding, he talks on the phone with his customers next to me (when he can go to the meeting room with his laptop) and doesn't care. He made me switch to a whole new IDE (from Netbeans to a commercial IDE costing a lot of money) for a really tiny feature (which I later found out was in Netbeans as well!). I didn't make a big deal out of it as I am equally comfortable working with this new IDE, but I couldn't get the science behind his obsession. He said this feature makes sure that if any method is updated by a programmer, the IDE will turn the method name to red in places where it is used. I told him that I do not have a problem since I always search for method usage in the project and make sure its updated. IDEs even have refactoring features for exactly that, but... I recently implemented a feature for a project, and I was happy about it and considering him a senior, I asked him his comments about the implementation quality.. he thought long and hard, made a few funny faces, and when he couldn't find anything, he said "ummm, your program will crash if JS is disabled" - he was wrong, since I had made sure it would work fine with default values even if JS was disabled. I told him that and then he said "oh okay". BUT, the funny thing is, a few days back, he implemented something and I objected with "But that would not run if JS is disabled" and his response was "We don't have to care about people who disable JS" :-/ Once he asked me to investigate if there was a way to modify a CMS generated menu programmatically by extending the CMS, I did my research and told him that the only was is to inject a menu item using JavaScript / jQuery and his reaction was "ah that's ugly, and hacky, not acceptable" and two days later, I see that feature implemented in the same way as I had suggested. The point is, his reaction was not respectful at all, even if what I proposed was hacky, he should be respectful, that I know what's hacky and if I am suggesting something hacky, there must be a reason for it. There are plenty of other reasons / examples where I feel I am not being treated fairly. I want your advice as to what is it that I am doing wrong and how to deal with such a situation. The other guys in the team are actually very good people, and I do not want to leave the job either (although I could, if I want to). All I want is respect and equal treatment. I have thought about talking to this guy in a face to face meeting, but that worries me that his attitude might get worse and make things more difficult for me (since he doesn't seem to be the guy who thinks he can be wrong too). I am also considering talking to the other co-founder but I am not sure how he will take it (as both founders have been friends forever). Thanks for reading the long message, I really appreciate your help.

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  • Defaulting the HLSL Vertex and Pixel Shader Levels to Feature Level 9_1 in VS 2012

    - by Michael B. McLaughlin
    I love Visual Studio 2012. But this is not a post about that. This is a post about tweaking one particular parameter that I’ve found a bit annoying. Disclaimer: You will be modifying important MSBuild files. If you screw up you will break your build tools. And maybe your computer will catch fire. I’m not responsible. No warranties or guaranties of any sort. This info is provided “as is”. By default, if you add a new vertex shader or pixel shader item to a project, it will be set to build with shader profile 4.0_level_9_3. If you need 9_3 functionality, this is all well and good. But (especially for Windows Store apps) you really want to target the lowest shader profile possible so that your game will run on as many computers as possible. So it’s a good idea to default to 9_1. To do this you could add in new HLSL files via “Add->New Item->Visual C++->HLSL->______ Shader File (.hlsl)” and then edit the shader files’ properties to set them manually to use 9_1 via “Properties->HLSL Compiler->General->Shader Model”. This is fine unless you forget to do this once and then submit your game with 9_3 shaders instead of 9_1 shaders to the Windows Store or to some other game store. Then you’d wind up with either rejection or angry “this doesn’t work on my computer! ripoff!” messages. There’s another option though. In “Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\ItemTemplates\VC\HLSL\1033\VertexShader” (note the path might vary slightly for you if you are using a 32-bit system or have a non-ENU version of Visual Studio 2012) you will find a “VertexShader.vstemplate” file. If you open this file in a text editor (e.g. Notepad++), then inside the CustomParameters tag within the TemplateContent tag you should see a CustomParameter tag for the ShaderType, i.e.: <CustomParameter Name="$ShaderType$" Value="Vertex"/> On a new line, we are going to add another CustomParameter tag to the CustomParameters tag. It will look like this: <CustomParameter Name="$ShaderModel$" Value="4.0_level_9_1"/> such that we now have:     <CustomParameters>       <CustomParameter Name="$ShaderType$" Value="Vertex"/>       <CustomParameter Name="$ShaderModel$" Value="4.0_level_9_1"/>     </CustomParameters> You can then save the file (you will need to be an Administrator or have Administrator access). Back in the 1033 directory (or whatever the number is for your language), go into the “PixelShader” directory. Edit the “PixelShader.vstemplate” file and make the same change (note that this time $ShaderType$ is “Pixel” not “Vertex”; you shouldn’t be changing that line anyway, but if you were to just copy and replace the above four lines then you will wind up creating pixel shaders that the HLSL compiler would try to compile as vertex shaders, with all sort of weird errors as a result). Once you’ve added the $ShaderModel$ line to “PixelShader.vstemplate” and have saved it, everything should be done. Since Feature Level 9_1 and 9_3 don’t support any of the other shader types, those are set to default to their appropriate minimums already (Compute and Geometry are set to “4.0” and Domain and Hull are set to “5.0”, which are their respective minimums (though not all 4.0 cards support Compute shaders; they were an optional feature added with DirectX 10.1 and only became required for DirectX 11 hardware). In case you are wondering where these magic values come from, you can find them all in the “fxc.xml” file in the “\Program Files (x86)\MSBuild\Microsoft.CPP\v4.0\V110\1033” directory (or whatever your language number is; 1033 is ENU and various other product languages have their own respective numbers (see: http://msdn.microsoft.com/en-us/goglobal/bb964664.aspx ) such that Japanese is 1041 (for example), though for all I know MSBuild tasks might be 1033 for everyone). If, like me, you installed VS 2012 to a drive other than the C:\ drive, you will find the vstemplate files in the drive to which you installed VS 2012 (D:\ in my case) but you will find the fxc.xml file on the C:\ drive. You should not edit fxc.xml. You will almost definitely break things by doing that; it’s just something you can look through to see all the other options that the FXC task takes such that you could, if needed, add further CustomParameter tags if you wanted to default to other supported options. I haven’t tried any others though so I don’t have any advice on how to set them.

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  • Ubuntu 12.04 LTS Realtek RTL8192E Problems

    - by Logan
    My wifi is not working. I have tried ndiswrapper with the XP driver but that still did not work. Please explain to me in layman's terms. I can run commands so if you tell me exactly what to put, i will put it. Basically, ubuntu is not showing a wireless networks option and when I ran some command yesterday it said the driver was UNCLAIMED. Please help. This is a wintec card with realtek rtl8192E chip on it. It is a desktop computer. On a 20gb partition, other 60gb is for windows(yeah its an old desktop). Use windows installer to install ubuntu(this is one of the dell desktops that wont boot ubuntu from disk). So any help is appreciated and I would like to get this done THIS weekend.

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  • Can't boot from liveUSB when trying to install it alongside Windows 7

    - by ali
    I'm very noob at Linux and installing techniques. I want to install 12.04 from bootable usb flash alongside Windows 7 (also tried live CD but not working) but computer is not booting from USB flash or LIVE-CD and boots windows 7 (Acer Aspire 4750g) and of course I have set the BIOS priority in the right way. There is one important point to tell that I have installed Fedora 16 on my laptop successfully and now I have it on my system. When I was trying to install Fedora I got some error and searched about it and got this point that I should delete a .efi file and then installation went right. In this case , what should I do to solve the problem? (I also don't need my Fedora anymore).

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  • Crashing trying to install Ubuntu 12.04 LTS

    - by Daniel Evans
    Hardware: Dell Inspiron 1545 Steps are as follows: 1. Insert 64 bit Ubuntu 12.04 disc 2. Boot computer Output is as follows: error: unexpectedly disconnected from boot status daemon Generating locales... en_US.UTF-8... done Generation complete. MEMORY-ERROR: glib-compile-schemas[569]: GSlice: assertion failed: aligned_memory == (gpointer) addr Aborted pwconv: failed to change the mode of /etc/passwd- to 0600 MEMORY-ERROR: [996]: GSlice: assertion failed: aligned_memory == (gpointer) addr MEMORY-ERROR: glib-compile-scehmas[1034]: GSlice: assertion failed: aligned_memory == gpointer) addr Aborted /usr/lib/python2.7/dist-packages/LanguageSelector/LocaleInfo.py:256: UserWarning: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory warnings.warn(msg.args[0].encode('UTF-8')) Using CD-ROM mount point /cdrom ... etc etc... End up at a prompt line ubuntu@ubuntu:~$

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  • Common Javascript mistakes that severely affect performance?

    - by melee
    At a recent UI/UX MeetUp that I attended, I gave some feedback on a website that used Javascript (jQuery) for its interaction and UI - it was fairly simple animations and manipulation, but the performance on a decent computer was horrific. It actually reminded me of a lot of sites/programs that I've seen with the same issue, where certain actions just absolutely destroy performance. It is mostly in (or at least more noticeable in) situations where Javascript is almost serving as a Flash replacement. This is in stark contrast to some of the webapps that I have used that have far more Javascript and functionality but run very smoothly (COGNOS by IBM is one I can think of off the top of my head). I'd love to know some of the common issues that aren't considered when developing JS that will kill the performance of the site.

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  • How to download kde or gnome from synaptic for offline installation

    - by Arin Chakraborty
    I know how to install GNOME 3 and KDE using apt-get. But i want to know how to, only download, from synaptic package manager, these shells. When i search for kubuntu-desktop in synaptic then the download file shows nearly 4MB but i clearly remember the actual size was near 100 mb. Just for information both are already installed in my laptop. So the question is - How to download the actuall 100 mb KUbuNTU-DESKTOP so that i can just, without any hesitation install it in offline computer which is using ubuntu 12.04. Same for the GNOME 3. Please help me out !

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  • Texturize a shape of multiple triangles in 2D

    - by Deukalion
    This is an example of a shape consisting of multiple points, triangles and eventually a shape: Red Dots = Vector3 (X, Y, Z) or Vector2 (X, Y) If I have a Texture of a certain size, how do I texturize this area in the best way so that the texture inside the shape matches the shape and does not overlap anywhere? Perhaps also with a chance to scale the texture in case it's too small or to big for the shape, but still so that it gets rendered correctly. Do I treat the shape as a rectangle? Figure out it's 4 corners? Or do I calculate the distance between Center - (Texture Width / 2) and Point (to see how "many" times the texture can fit between on that axis to estimate at what Coordinates the Texture should be at that certain point? I've looked at Texture Mapping but haven't found any concrete examples that it explains it well, it's also confusing with 0.0-1.0 values for Texture Coordinates.

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  • How to handle updated configuration when it's already been cloned for editing

    - by alexrussell
    Really sorry about the title that probably doesn't make much sense. Hopefully I can explain myself better here as it's something that's kinda bugged me for ages, and is now becoming a pressing concern as I write a bit of software with configuration. Most software comes with default configuration options stored in the app itself, and then there's a configuration file (let's say) that a user can edit. Once created/edited for the first time, subsequent updates to the application can not (easily) modify this configuration file for fear of clobbering the user's own changes to the default configuration. So my question is, if my application adds a new configurable parameter, what's the best way to aid discoverability of the setting and allow the user (developer) to override it as nicely as possible given the following constraints: I actually don't have a canonical default config in the application per se, it's more of a 'cascading filesystem'-like affair - the config template is stored in default/config.json and when the user wishes to edit the configuration, it's copied to user/config.json. If a user config is found it is used - there is no automatic overriding of a subset of keys, the whole new file is used and that's that. If there's no user config the default config is used. When a user wishes to edit the config they run a command to 'generate' it for them (which simply copies the config.json file from the default to the user directory). There is no UI for the configuration options as it's not appropriate to the userbase (think of my software as a library or something, the users are developers, the config is done in the user/config.json file). Due to my software being library-like there's no simple way to, on updating of the software, run some tasks automatically (so any ideas of look at the current config, compare to template config, add ing missing keys) aren't appropriate. The only solution I can think of right now is to say "there's a new config setting X" in release notes, but this doesn't seem ideal to me. If you want any more information let me know. The above specifics are not actually 100% true to my situation, but they represent the problem equally well with lower complexity. If you do want specifics, however, I can explain the exact setup. Further clarification of the type of configuration I mean: think of the Atom code editor. There appears to be a default 'template' config file somewhere, but as soon as a configuration option is edited ~/.atom/config.cson is generated and the setting goes in there. From now on is Atom is updated and gets a new configuration key, this file cannot be overwritten by Atom without a lot of effort to ensure that the addition/modification of the key does not clobber. In Atom's case, because there is a GUI for editing settings, they can get away with just adding the UI for the new setting into the UI to aid 'discoverability' of the new setting. I don't have that luxury. Clarification of my constraints and what I'm actually looking for: The software I'm writing is actually a package for a larger system. This larger system is what provides the configuration, and the way it works is kinda fixed - I just do a config('some.key') kinda call and it knows to look to see if the user has a config clone and if so use it, otherwise use the default config which is part of my package. Now, while I could make my application edit the user's configuration files (there is a convention about where they're stored), it's generally not done, so I'd like to live with the constraints of the system I'm using if possible. And it's not just about discoverability either, one large concern is that the addition of a configuration key won't actually work as soon as the user has their own copy of the original template. Adding the key to the template won't make a difference as that file is never read. As such, I think this is actually quite a big flaw in the design of the configuration cascading system and thus needs to be taken up with my upstream. So, thinking about it, based on my constraints, I don't think there's going to be a good solution save for either editing the user's configuration or using a new config file every time there are updates to the default configuration. Even the release notes idea from above isn't doable as, if the user does not follow the advice, suddenly I have a config key with no value (user-defined or default). So the new question is this: what is the general way to solve the problem of having a default configuration in template config files and allowing a user to make user-specific version of these in order to override the defaults? A per-key cascade (rather than per-file cascade) where the user only specifies their overrides? In this case, what happens if a configuration value is an array - do we replace or append to the default (or, more realistically, how does the user specify whether they wish to replace or append to)? It seems like configuration is kinda hard, so how is it solved in the wild?

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