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  • Is it safe to convert Windows file paths to Unix file paths with a simple replace?

    - by MxyL
    So for example say I had it so that all of my files will be transferred from a windows machine to a unix machine as such: C:\test\myFile.txt to {somewhere}/test/myFile.txt (drive letter is irrelevant at this point). Currently, our utility library that we wrote ourselves provides a method that does a simple replace of all back slashes with forward slashes: public String normalizePath(String path) { return path.replaceAll("\\", "/"); } Slashes are reserved and cannot be part of a file name, so the directory structure should be preserved. However, I'm not sure if there are other complications between windows and unix paths that I may need to worry about (eg: non-ascii names, etc)

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  • Design a Distributed System

    - by Bonton255
    I am preparing for an interview on Distributed Systems. I have gone through a lot of text and understand the basics of the area. However, I need some examples of discussions on designing a distributed system given a scenario. For example, if I were to design a distributed system to calculate if a number N is primary or not, what will the be design of the system, what will be the impact of network latency, CPU performance, node failure, addition of nodes, time synchronization etc. If you guys could present your in-depth thoughts on this example, or point me to some similar discussion, that would be really helpful.

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  • Which can I use to make GTK themes?

    - by tutuca
    I'm trying to make a new gtk theme using the murrine engine, using Humanity (default in ubuntu 9.10) as a template. You can grab the code in http://github.com/tutuca/themes However, I found cumbersome the process of creating a new theme with it. There is no central starting point. The documentation of both, the engine options (gtkrc's and stuff), and general theming practices (the format of the index.theme files, folders, bla bla) is scarce, How to's and tutorials are often old or subject to lots of opinionated debate and results confusing (to me, having a web developer background, at least :-). So... I wanted to ask to the fellows gtk themers and artist out there: Which tools you use to create a new theme, and how does your average workflow looks like?

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  • Creating a SOLID Visual Studio Solution

    The SOLID acronym describes five object-oriented design principles that, when followed, produce code that is cleaner and more maintainable. The last principle, the Dependency Inversion Principle, suggests that details depend upon abstractions. Unfortunately, typical project relationships in .NET applications can make this principle difficult to follow. In this article, I'll describe how one can structure a set of projects in a Visual Studio solution such that DIP can be followed, allowing for the creation of a SOLID solution. You can download the sample solution and use it as a starting point for your new solutions if you like.

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  • Game Patching Mac/PC

    - by Centurion Games
    Just wondering what types of solutions are available to handle patching of PC/Mac games that don't have any sort of auto updater built into them. In windows do you just spin off some sort of new install shield for the game that includes the updated files, hope you can read a valid registry key to point to the right directory, and overwrite files? If so how does that translate over to Mac where the game is normally just distributed as straight up .app file? Is there a better approach than the above for an already released product? (Assuming direct sells, and not through a marketplace that features auto-updating like Steam.) Are there any off the shelf auto-updater type libraries that could also be easily integrated with a C/C++ code base even after a game has been shipped to make this a lot simpler, and that are cross platform? Also how do auto-updaters work with new OS's that want applications and files digitally signed?

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  • Disable incognito in chrome or chromium

    - by TheIronKnuckle
    I'm addicted to certain websites to the point where it's interfering with my life regularly and sick of it. I want to install website blockers that aren't easy to circumvent. In Chrome, incognito mode is easily accessible with a ctrl-shift-n. That is ridiculous. Whenever I feel an urge to go on an addictive website, it doesn't matter what blockers and regulators I've got installed; three keys can get round them in a second. Simply uninstalling chrome isn't an option either, as it's way too easy to sudo apt-get install it right back. So yes, I want to disable incognito mode completely (and if possible making it totally impossible to get it back). I note that some guy has figured out how to do it on windows with a registry entry: http://wmwood.net/software/incognito-gone-get-rid-of-private-browsing/ If it can be done on windows it can be done on ubuntu!

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  • KVM and libvirt: How to configure a new disc device to an existing VM?

    - by initall
    I've got an Ubuntu 9.04 server running two VM's. In /etc/libvirt/qemu/machine1.xml two disk devices are defined like this: <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <source file='/vserver/machine1/disk0.qcow2'/> <target dev='hda' bus='ide'/> </disk> <disk type='file' device='disk'> <source file='/vserver/machine1/disk1.qcow2'/> <target dev='hdb' bus='ide'/> </disk> I need more storage space in at least one of the devices and thought about adding a third hdc device by simply adding one with same style as above and re-organising my mount structure (The virtual sizes of the current qcow2 files are unfortunately limited.) My problem is that reloading libvirtd and restarting the VM do not result in a new visible device (checked with fdisk). I'm aware of extending an existing qcow2 file (converting to raw format, cat-ing/adding the new one, using smth. like gparted) - but only as a last resort. Hopefully it's something very simple I'm missing?

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  • Is it time to add IPv6 access to my websites?

    - by Rob Hoare
    I have several dedicated servers and VPS servers, and some of those are at companies that have provided me with native IPv6 blocks (in addition to the IPv4 IP addresses). Does it currently make sense to point an AAAA record to an IPv6 address on my server, in addition to the A record pointing to the IPv4 address? This would be for (for example) the www subdomain. (the networking and web server software would be set up on the server to respond appropriately). A while ago I read that a small percentage of users (1 in a thousand?) would have slow or no access if a subdomain had both A and AAAA records because their networking software asked for one and got the other. Is that still the case, will adding an AAAA record inconvenience some users, or is the percentage already smaller and falling? In other words, is now the time to get around to adding native IPv6 support for a busy website aimed at the general public, or is it still too early?

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  • Can't mv files between directories on vsftpd

    - by frankyue
    I enabled this in vsftpd.conf chroot_local_user=YES chroot_list_enable=YES chroot_list_file=/etc/vsftpd.chroot_list user_config_dir=/etc/vsftpd_user_conf and here is the user set in vsftpd_user_conf dirctory ftpupload : local_root=/mnt/upload But /mnt/upload is mounted from another directory /mnt/upload on /opt/upload type none (rw,bind) Here is the list in /mn/upload rough_images/ shoes-pentland/ vendor-upload/ shooting/ Additional, the shooting/ directory is mounted from another place /mnt/upload/shooting on /mnt/shooting none (rw,bind) Now here is the problem. When I use the ftp client to move the files between the directories but failed .Files can moved between any directories except the shooting one. The permission is right . I can move any files between this directories successful by using su ftpupload. It means the vsftpd didn't support the mount bind? Here is the vsftpd.conf listen=YES anonymous_enable=NO local_enable=YES write_enable=YES local_umask=000 dirmessage_enable=YES use_localtime=YES xferlog_enable=YES connect_from_port_20=YES chown_uploads=YES chown_username=app xferlog_std_format=NO log_ftp_protocol=YES chroot_local_user=YES chroot_list_enable=YES chroot_list_file=/etc/vsftpd.chroot_list user_config_dir=/etc/vsftpd_user_conf ls_recurse_enable=YES secure_chroot_dir=/var/run/vsftpd/empty pam_service_name=vsftpd pasv_enable=YES pasv_max_port=*** pasv_min_port=*** port_enable=YES pasv_address=*** virtual_use_local_privs=YES tcp_wrappers=YES and here is the mtab: /mnt/upload /opt/upload none rw,bind 0 0 /mnt/upload/shooting /mnt/shooting none rw,bind 0 0 all of the permissions under the /mnt/upload are the same: drwxrwxrwx * ftpupload app

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  • "Invalid operation" status code in a HATEOAS REST API

    - by FinnNk
    In a HATEOAS API links are returned which represent possible state transitions. A conforming client should just be retrieving and following those links, but if a non-conforming client is constructing URIs rather than following the supplied links what would be the most appropriate status code/response to return? 400 would work, together with some information in the response body - this is what we're currently doing 403 I guess would be wrong, as it implies that the request could never work - but potentially the link may be available in the future 404 sounds plausible - at this point in time the resource doesn't exist What do people think? I know that conditional requests can handle requests based on stale responses (resulting in e.g. 412s), but this is a slightly different situation.

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  • Method chaining vs encapsulation

    - by Oak
    There is the classic OOP problem of method chaining vs "single-access-point" methods: main.getA().getB().getC().transmogrify(x, y) vs main.getA().transmogrifyMyC(x, y) The first seems to have the advantage that each class is only responsible for a smaller set of operations, and makes everything a lot more modular - adding a method to C doesn't require any effort in A, B or C to expose it. The downside, of course, is weaker encapsulation, which the second code solves. Now A has control of every method that passes through it, and can delegate it to its fields if it wants to. I realize there's no single solution and it of course depends on context, but I would really like to hear some input about other important differences between the two styles, and under what circumstances should I prefer either of them - because right now, when I try to design some code, I feel like I'm just not using the arguments to decide one way or the other.

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  • In centralized version control, is it always good to update often?

    - by janos
    Assuming that: You are in a team developing some software. Your team is using centralized version control in the development process. You are working on a new feature which will surely take several days to complete, and you won't be able to commit before that because it would break the build. Your team members commit something every day that affects some of the files you're working with for your fancy new feature. Since this is centralized version control, you will have to update your local checkout at some point: at least once right before committing the new feature. If you update only once right before your commit, then there might be a lot of conflicts due to the many other changes by your teammates, which could be a world of pain to resolve all at once. Or, you could update often, and even if there are a few conflicts to resolve day by day, it should be easier to do, little by little. Can we say that it is always a good idea to update often?

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  • Aliasing resellers domain to primary domain

    - by Ashkan Mobayen Khiabani
    I have designed a website that accepts re-sellers and actually the concept of this website is having local re-sellers for each province (or should we say branches). I have designed this website in a way that anybody who has a domain, can point to our website (a record or cname). well most of the website content are the same, the only difference is that re-sellers website doesn't have some items on the main menu and may have some small descriptions of their own branch in some pages. I read that Google may ban websites with duplicate content (or which are significantly similar). I want to know will this be a problem for me? If yes, what else can I do? we have had considered asking our reseller to use iframe that loads our website but wanted that each reseller can have its own SEO and try harder but what I read about this duplicate thing worries me.

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  • How to market yourself as a software developer?

    - by karlphillip
    I have noticed that this is a frequent issue among younglings from technical areas such as ours. In the beginning of our careers we simply don't know how to sell ourselves to our employers, and random guy #57 (who is a programmer, but not as good as you - technically) ends up getting a raise/promotion just because he knows how to communicate and market himself better than you. Many have probably seen this happen in the past, and most certainly many more will in the future. What kind of skill/ability (either technical, or of other nature) do you think is relevant to point out when doing a job interview or asking for a raise, besides listing all the programming languages and libraries you know?

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  • Le Cigref et l'Inhesj ouvrent une formation en sécurité informatique, des études sont-elles nécessai

    Le Cigref et l'Inhesj ouvrent une formation en sécurité informatique, des études sont-elles nécessaires dans cette spécialité ? L'Institut national des hautes études de la sécurité et de la justice (Inhesj), en association avec le Cigref (Club informatique des grandes entreprises françaises) à mis au point et ouvert un cycle de spécialisation en sécurité informatique. Une première, qui a pour but de "délivrer les savoir-faire visant l'identification, l'évaluation et la maîtrise de l'ensemble des risques et des malveillances informatiques au sein des entreprises". Le cycle de spécialisation « Sécurité numérique » sera destiné aux cadres d'entreprise et abordera l'ensemble des aspects stratégiques, juridiques...

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  • What should I worry about when changing OpenGL origin to upper left of screen?

    - by derivative
    For self education, I'm writing a 2D platformer engine in C++ using SDL / OpenGL. I initially began with pure SDL using the tutorials on sdltutorials.com and lazyfoo.net, but I'm now rendering in an OpenGL context (specifically immediate mode but I'm learning about VAOs/VBOs) and using SDL for interface, audio, etc. SDL uses a coordinate system with the origin in the upper left of the screen and the positive y-axis pointing down. It's easy to set up my orthographic projection in OpenGL to mirror this. I know that texture coordinates are a right-hand system with values from 0 to 1 -- flipping the texture vertically before rendering (well, flip the file before loading) yields textures that render correctly... which is fine if I'm drawing the entire texture, but ultimately I'll be using tilesets and can imagine problems. What should I be concerned about in terms of rendering when I do this? If anybody has any advice or they've done this themselves and can point out future pitfalls, that would be great, but really any thoughts would be appreciated.

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  • Resize broswer window below 400px on OS X

    - by David
    Resizing Firefox windows (by dragging) works fine, up until the window is about 400 px wide, at which point the width of the web page content cease to follow the window with. I'm pretty sure it's not a CSS issue, and the same thing goes for Chrome and Safari as well (they won't even let me resize the window < 400 px wide). I can't understand where this limitation comes from. Is it a setting in the browser? A bug? A limitation of the OS?

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  • Why are so many questions closed? [closed]

    - by Kim Jong Woo
    Why is there so many questions on this stackexchange site closed? I mean far more than usual. Even very high quality discussions are closed. Doesn't this high number of closed questions with high number of views and good quality of content seem like that the current policy that governs the criteria for appropriate question might be going against nature? I mean it feels as if lot of questions or discussions are everything surrounding programmer, programming, and need not be objective or seeking definitive answer. It appears lot of questions are of inquisitive nature seeking insight into other programmers and finding common subjects of interest. Is it possible for mods to relax a bit? I mean lot of great questions with [closed] tag everywhere doesn't do justice. This question in itself is a perfect example of what I am talking about and it will be closed. But I think my point is clear.

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  • Is there a cross-platform special directory I can use for game save files?

    - by Suds
    I'm developing with LWJGL and Java on a Windows 7 laptop. I've successfully set up saving to the %appdata%\gamename\saves\ or long form c:\users\user\appdata\roaming\gamename\saves\ folder by using File dir = new File(System.getenv("APPDATA") + "\\gamename\\saves\\");. I have hobbyist level experience with Linux, and zero experience with OSX. My game will be fully cross platform. Is System.getenv("APPDATA"); cross platform? If so, where does it point to on Linux or OSX? Is there a best practices alternative that I should use?

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  • What are the pro/cons of Unity3D as a choice to make games?

    - by jokoon
    We are doing our school project with Unity3d, since they were using Shiva the previous year (which seems horrible to me), and I wanted to know your point of view for this tool. Pros: multi platform, I even heard Google is going to implement it in Chrome everything you need is here scripting languages makes it a good choice for people who are not programming gurus Cons: multiplayer ? proprietary, you are totally dependent of unity and its limit and can't extend it it's less "making a game from scratch" C++ would have been a cool thing I really think this kind of tool is interesting, but is it worth it to use at school for a project that involves more than 3 programming persons ? What do we really learn in term of programming from using this kind of tool (I'm ok with python and js, but I hate C#) ? We could have use Ogre instead, even if we were learning direct x starting january...

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  • Elantech trackpad being identified as a logitech wheel mouse.

    - by Nathan Cox
    I recently purchased a Samsung RF510 laptop computer, which I absolutely love. However, upon installing Ubuntu 10.10 onto it I couldn't get the trackpad to function properly. It worked as a basic mouse (point and click) but had no functionality for edge scrolling or any of the multitouch settings the trackpad is capable of. After doing a lot of research I discovered the reason is a known issue where the Ubuntu kernel will improperly detect an Elantech trackpad as a logitech PS/2 wheel mouse, and as such will gain none of the functionality that seems to be coded for synaptics trackpads. The question I have is: does anyone know a way to get this working properly? This is my first time trying to run Ubuntu on a laptop (actually, it's my first laptop in the last 12 years) and I'm finding the experience to be intolerable without the basic scrolling/zooming/etc I've been used to using for as long as I can remember.

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  • Am I getting Scheme wrong?

    - by nischayn22
    Inspired by the numerous posts about the importance of learning Lisp/Scheme I started to learn Scheme two days back, I am using the book "The little Schemer" and have completed half of it. But I still haven't learned anything new, the book teaches about recursion which I already understand and uses lambda (which I can think of a way to define a function in C). I still haven't got the concept of functional programming (please point to some example of functional compared to normal programming methods in C/C++ so I can get it). Am I learning in the wrong way? or is "The little Schemer" for a newbie in programming and I should look for some other books?

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  • 302 Redirect causes garbage at end of Wordpress link in Facebook

    - by Joao
    When I try to link my Wordpress blog to Facebook, the url doesn't resolve properly. There's garbage appended at the end and Facebook is not able to retrieve information from the site. Happens in every page, post or main entry. Here's what happens: http://clarissarezende.com.br/ shows up in Facebook as http://clarissarezende.com.br/UPLcS/ (when copy/paste the link) and no information about the site shows up in FB. I'm using Wordpress 3.3.1 with ProPhoto 4. Recently I moved the DNS entry on my ISP. The blog is hosted at clarissarezende.com.br/public_html/blog2 and before the DNS would point to public_html and then I changed it to public_html/blog2. Note that I did not move any Wordpress files. Made the (I think) necessary changes all over Facebook, but still no dice... Any ideas on what can be happening?

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  • What is the need of Odata when I have JSON ?

    - by punkouter
    I am trying to understand the point of Odata and when it would make sense. Right now how I work is I use ASP.NET and MVC/WebApi controller to serialize/deserialize objects into JSON and have javascript do something with it. From what I can tell the benefit of OData is being able to query directly from the URL ... But since I am writing the client and server code there is no need for that. Would anyone ever parse the results of a ODaya query in javascript?? Maybe OData is more about providing a generic endpoint for ALL clients to get detailed information from a query that JSON does not provide ? So if I was a provider of data then I suppose that is what odata is for ? Help me understand the purpose and use of REST/JSON/ODATA.

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  • How to programmatically construct textual query

    - by stibi
    Here is a query language, more specifically, it's JQL, you can use it in Jira, to search for issues, it's something like SQL, but quite simpler. My case is that, I need to construct such queries programmatically, in my application. Something like: JQLMachine jqlMachine = new JQLMachine() jqlMachine.setStatuses("Open", "In Progress") jqlMachine.setReporter("foouser", "baruser") jqlMachine.setDateRange(...) jqlMachine.getQuery() --> String with corresponding JQL query is returned You get my point I hope. I can imagine the code for this, but it's not nice, using my current knowledge how I'd do that. That's why I'm asking. What you'd advice to use to create such thing. I believe some patterns for creating something like this already exist and there is already best practices, how to do that in good way.

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