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  • Parallelism implies concurrency but not the other way round right?

    - by Cedric Martin
    I often read that parallelism and concurrency are different things. Very often the answerers/commenters go as far as writing that they're two entirely different things. Yet in my view they're related but I'd like some clarification on that. For example if I'm on a multi-core CPU and manage to divide the computation into x smaller computation (say using fork/join) each running in its own thread, I'll have a program that is both doing parallel computation (because supposedly at any point in time several threads are going to run on several cores) and being concurrent right? While if I'm simply using, say, Java and dealing with UI events and repaints on the Event Dispatch Thread plus running the only thread I created myself, I'll have a program that is concurrent (EDT + GC thread + my main thread etc.) but not parallel. I'd like to know if I'm getting this right and if parallelism (on a "single but multi-cores" system) always implies concurrency or not? Also, are multi-threaded programs running on multi-cores CPU but where the different threads are doing totally different computation considered to be using "parallelism"?

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  • How do bug reports factor in to a sprint?

    - by Mark Ingram
    I've been reading up on Scrum recently. From my understanding, a meeting is held before the sprint starts, to decide what gets moved from the product backlog to the upcoming sprint backlog. Once a feature is completed in the current sprint, it will go into the "Ready to QA" bucket, and it's at this point that I'm getting confused. Do bug reports go back into the product backlog? I assume they can't go back into the sprint backlog as we've already decided what work will be done for this cycle? What happens when QA finds a bug? Where does it go?

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  • How to restore the icon of firefox (or any other program)

    - by Santosh
    Ubuntu 11.10 came with Firefox 7.x.x so I downloaded the Firefox 12 from its site. I did following to install this Extracted the archive. Put that extracted folder into /usr/lib/, the location was something like /usr/lib/firefox-12.0/. At this point of time I was having 2 firefox versions, so I deleted the older one (/usr/lib/firefox-7.x.x) Next I made a link of the firefox executable (/usr/lib/firefox-12.0/firefox) and place that into /usr/bin replacing the older one. During this process I didn't touched/removed from launcher bar. There was no problem in to launch firefox from the old icon from the launcher, I checked the version in about and it was 12. But as soon as I restarted the system I got the following results. Now how can I restore the icons?

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  • OBIEE 11.1.1 - Tips for In-place Upgrade from 11.1.1.6 to 11.1.1.7.x

    - by Ahmed Awan
    Tips: – Use the Test to Production (T2P) / cloning process (movement scripts). For example: – Clone up the existing 11.1.1.6 environment.– Move the cloned copy to the new location / host (same 11.1.1.6.0 version at this point).– Patch new location / host (11.1.1.6) to the 11.1.1.7 level.– Switch to Production. – How to use movement scripts for OBIEE: 20.1 Introduction to the Movement Scripts , for details refer to: http://docs.oracle.com/cd/E29542_01/core.1111/e10105/clone.htm#CACHFECE 21.4.7.1 Moving Oracle Business Intelligence to a New Target Environment, for details refer to: http://docs.oracle.com/cd/E29542_01/core.1111/e10105/testprod.htm#CHDIAEFA http://docs.oracle.com/cd/E29542_01/core.1111/e10105/testprod.htm#BABGJGCF – Perform in-place upgrade to 11.1.1.7.0 using manual steps / Upgrade wizard, refer to: http://docs.oracle.com/cd/E28280_01/upgrade.1111/e16452/bi_plan.htm#BABECJJH

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  • Tile-based maps in AS3

    - by Ashley
    I want to make a tile-based platformer in AS3. I want my game to read an external maps file (in xml or json or somethimg similar) to draw a tile-based map. I've seen loads of tutorials for this in AS2 and other languages, and the few I've found in AS3 are either incomplete or filled with extra unnecessary features. I just want to be able to draw a basic map from sprites in Flash. Any links or information to point me in the right direction would be appreciated.

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  • Starting Spring Lineup

    - by onefloridacoder
    This morning I finished removing all VS2008 related frameworks and installed items related to VS2010 based on posts around the community.  Here’s what I started with on my dev laptop, the config for my laptop:  HP Pavilion dv6  Win7 64-bit 4Gb RAM Installed Developer Tools and Frameworks: Sync 2.0 SDK Visual Studio 2010 Pex Power Tools Enterprise Library 5.0 SQL Server 2008 Developer Edition Visual Studio 2008 Ultimate Expression Blend 4 RC Team Foundation Server 2010 Team Foundation Server 2010 SDK   The only item I did not reinstall on top of VS2010 was ReSharper 4.5 only because I read mixed reviews on the dev experience.  At this point I really just want to get use to the new(er) IDEs without adding any confusion to my dev machine.  I’ll level off my desire for early adoption at Blend, EntLib 5.0, and Pex - I’m also interested in the Moles integration as well.   Something else I didn’t have to install was my IDE theme which was left behind in my user folder was merged during installation – afterwards it was nice to see once the dust settled.

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  • modifying openssl library code

    - by Nouar Ismail
    I am ordered to check the availability to customize an encryption algorithm the IPsec protocol use in Ubuntu, if anyone have any suggestion about this point?. I've read that the encryption operation occur in libcrypto in openssl. when I tried to compile and install OpenSSL from source ..I had everything ok with the installation, but when to check the version installed on the system, with "dpkg -s openssl", it didn't seem that it's the version i had already installed, maybe it had been installed successfully, but the question is: would it be the version the system use for encryption operations? would it overwrite the old version? and would my changes in code have effects ? any help please? thank you in advance.

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  • What are graphs in laymen's terms

    - by Justin984
    What are graphs, in computer science, and what are they used for? In laymen's terms preferably. I have read the definition on Wikipedia: In computer science, a graph is an abstract data type that is meant to implement the graph and hypergraph concepts from mathematics. A graph data structure consists of a finite (and possibly mutable) set of ordered pairs, called edges or arcs, of certain entities called nodes or vertices. As in mathematics, an edge (x,y) is said to point or go from x to y. The nodes may be part of the graph structure, or may be external entities represented by integer indices or references. but I'm looking for a less formal, easier to understand definition.

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  • Any good, easy to learn from books or tutorials for learning assembly? [on hold]

    - by pythonian29033
    I've been a developer since 2009 and I've learnt a lot of languages since, but I've always wanted to understand and be able to code in the lowest level language so I can directly (or at least very close to directly) speak to machines through my code. There was a point in time when someone showed me how to do an if statement in assembly, but out of all the books that I got, I could never really understand where/how to start learning to code in assembler. any help please? I'm obsessed with learning this! PS: if you have any software suggestions, I use ubuntu and am looking to convert to backtrack soon, so it would be preferred if you could give me something that'll be easily installed on debian linux, otherwise don't sweat it, give me the name of the windows software and I'll find an equivalent myself

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  • is the AOC e2239fwt supported for multi touch on any ubuntu distro?

    - by HybriDPjT
    as the title says i have the e2239fwt monitor and ive tried ubuntu 10.04, 10.10, 11.04, 12.04 and now 13.04 and i cant get it to work. i should state that the single point touch seems to work ok but thats all. ive already tried looking and found no answers so here i am asking the peeps in the know :) i am currently running 13.04 and possibly going back to 10.04 if i cant get it to work or find that this monitor is in fact not supported.. hybridpjt@Unicorn:~$ lsusb Bus 002 Device 002: ID 05e3:0610 Genesys Logic, Inc. 4-port hub Bus 003 Device 002: ID 045e:0780 Microsoft Corp. Bus 003 Device 003: ID 06a3:0cc3 Saitek PLC Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 0408:3001 Quanta Computer, Inc. Optical Touch Screen

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  • Bzr Eclipse Plugin not configurable

    - by Ubuntourist
    I'm relatively new to Eclipse. I'm currently running bzr 2.2.1 and Eclipse 3.5.2 (Galileo). Following the directions at: http://wiki.bazaar.canonical.com/BzrEclipse/Installation I get to the point where it tells me the plugin has been successfully installed, but when I attempt to configure it at Window -- Preferences -- Team -- Bazaar, there's no "Bazaar" there. Team shows CVS, File Contents, Ignored Resources and Models. (Nothing useful under CVS.) Nothing in ~/workspace/.metadata/.log about bzr either. I've uninstalled and reinstalled the plugin a few times, to no avail. Is there a more thorough way to uninstall that plugin without removing everything else that's been installed? Is there somewhere else I should be looking for the source of trouble? I didn't see anything promising on Launchpad, but may not have looked deep enough.

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  • Power & Sleep Management

    - by Espressofa
    I'm running 12.10 with xmonad. Trying to ensure that the right things happen when I close laptop lid, etc. I see Internet search results for similar issues that mostly point towards gnome-power-manager. I have the package installed, but gnome-power-manager is not in my path anywhere. The behavior I'm looking for is as following: Sleep on lid close Awaken on lid open Turn off screen after 10 idle minutes Most importantly, have better battery life. I'm supposed to be getting 9 hours and I haven't seen the battery life estimate above 2.5 hours yet. Any tips on where to look or how to configure this would be much appreciated.

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  • How do you approach tutorials

    - by aurel
    Hi I get lots of interesting tutorials through feeds and sometimes I implement them step by step, other times I just read through them and note anything that I do not know. when ever I implement them I takes a long time - starting the project, typing the code (as I feel there is no point to copy and paste ), then going back and forth between browser and editing program All in all, I am interested to know how do you learn from the tutorials (I'm no where close to being an expert). Or if you don't use tutorials, is there any other way to learn? Thanks a lot

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  • ODTUG is Looking for your ADF Feedback

    - by Shay Shmeltzer
    While we at Oracle are busy planning next month's Oracle OpenWorld - which should have one of the busiest schedule ever for ADF developers - another conference is also looking to know what you would like to learn about Oracle ADF. ODTUG is well on their way planning the upcoming KScope 13 conference - and they would like to better understand the needs of developers who are already working with ADF or of developers who are about to embark on their ADF road. They have put up a new short survey to collect your thoughts here. And while we are talking about KScrope it is worth mentioning that one easy way to get a free pass to that conference is to get accepted as a speaker and their call for papers is now open. Check it out and submit your ADF abstracts. And one last point about ODTUG - they just added several web seminars about ADF to their upcoming schedule of free online seminars - check it out and register now - membership is not required for attending the seminars.

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  • Using DLLEXPORT to export DLL function With Class to C#

    - by SICGames2013
    In my previous revision game engine I deported major functions for the game editor for C#. Now, I'm beginning to revise the game engine with a static library. There's a already dynamic library created in C++ to use DLLEXPORT for C#. Just now I want to test out the newer functions and created a DLL file from C++. Because the DLL contains classes I was wondering how would I be able to use DLL Export. Would I do this: [DLLEXPORT("GameEngine.dll", EntryPoint="SomeClass", Conventional=_stdcall)] static extern void functionFromClass(); I have a feeling it's probably DLLImport and not DLLExport. I was wondering how would I go about this? Another way I was thinking was because I already have the DLL in C++ prepared already to go the C# Class Library. I could just keep the new engine as a lib, and link the lib with the old DLL C++ file. Wouldn't the EntryPoint be able to point to the class the function is in?

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  • How to make creating viewmodels at runtime less painful

    - by Mr Happy
    I apologize for the long question, it reads a bit as a rant, but I promise it's not! I've summarized my question(s) below In the MVC world, things are straightforward. The Model has state, the View shows the Model, and the Controller does stuff to/with the Model (basically), a controller has no state. To do stuff the Controller has some dependencies on web services, repository, the lot. When you instantiate a controller you care about supplying those dependencies, nothing else. When you execute an action (method on Controller), you use those dependencies to retrieve or update the Model or calling some other domain service. If there's any context, say like some user wants to see the details of a particular item, you pass the Id of that item as parameter to the Action. Nowhere in the Controller is there any reference to any state. So far so good. Enter MVVM. I love WPF, I love data binding. I love frameworks that make data binding to ViewModels even easier (using Caliburn Micro a.t.m.). I feel things are less straightforward in this world though. Let's do the exercise again: the Model has state, the View shows the ViewModel, and the ViewModel does stuff to/with the Model (basically), a ViewModel does have state! (to clarify; maybe it delegates all the properties to one or more Models, but that means it must have a reference to the model one way or another, which is state in itself) To do stuff the ViewModel has some dependencies on web services, repository, the lot. When you instantiate a ViewModel you care about supplying those dependencies, but also the state. And this, ladies and gentlemen, annoys me to no end. Whenever you need to instantiate a ProductDetailsViewModel from the ProductSearchViewModel (from which you called the ProductSearchWebService which in turn returned IEnumerable<ProductDTO>, everybody still with me?), you can do one of these things: call new ProductDetailsViewModel(productDTO, _shoppingCartWebService /* dependcy */);, this is bad, imagine 3 more dependencies, this means the ProductSearchViewModel needs to take on those dependencies as well. Also changing the constructor is painful. call _myInjectedProductDetailsViewModelFactory.Create().Initialize(productDTO);, the factory is just a Func, they are easily generated by most IoC frameworks. I think this is bad because Init methods are a leaky abstraction. You also can't use the readonly keyword for fields that are set in the Init method. I'm sure there are a few more reasons. call _myInjectedProductDetailsViewModelAbstractFactory.Create(productDTO); So... this is the pattern (abstract factory) that is usually recommended for this type of problem. I though it was genius since it satisfies my craving for static typing, until I actually started using it. The amount of boilerplate code is I think too much (you know, apart from the ridiculous variable names I get use). For each ViewModel that needs runtime parameters you'll get two extra files (factory interface and implementation), and you need to type the non-runtime dependencies like 4 extra times. And each time the dependencies change, you get to change it in the factory as well. It feels like I don't even use a DI container anymore. (I think Castle Windsor has some kind of solution for this [with it's own drawbacks, correct me if I'm wrong]). do something with anonymous types or dictionary. I like my static typing. So, yeah. Mixing state and behavior in this way creates a problem which don't exist at all in MVC. And I feel like there currently isn't a really adequate solution for this problem. Now I'd like to observe some things: People actually use MVVM. So they either don't care about all of the above, or they have some brilliant other solution. I haven't found an in-depth example of MVVM with WPF. For example, the NDDD-sample project immensely helped me understand some DDD concepts. I'd really like it if someone could point me in the direction of something similar for MVVM/WPF. Maybe I'm doing MVVM all wrong and I should turn my design upside down. Maybe I shouldn't have this problem at all. Well I know other people have asked the same question so I think I'm not the only one. To summarize Am I correct to conclude that having the ViewModel being an integration point for both state and behavior is the reason for some difficulties with the MVVM pattern as a whole? Is using the abstract factory pattern the only/best way to instantiate a ViewModel in a statically typed way? Is there something like an in depth reference implementation available? Is having a lot of ViewModels with both state/behavior a design smell?

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  • AWS EC2 Oracle RDB connection to Oracle Database Instance

    - by llaszews
    Provisioning my Oracle database instance to AWS EC2 RDB was easy. Just a few clicks! However, getting my connection to my Oracle cloud database was not as easy. A couple things that are not obvious (using Oracle SQL Developer): 1. Need to set up a database security group. 2. Need to use end point for the host name. This video is the best one on the internet to explain both points: http://www.youtube.com/watch?v=ocFURuX0eEw

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  • Do immutable objects and DDD go together?

    - by SnOrfus
    Consider a system that uses DDD (as well: any system that uses an ORM). The point of any system realistically, in nearly every use case, will be to manipulate those domain objects. Otherwise there's no real effect or purpose. Modifying an immutable object will cause it to generate a new record after the object is persisted which creates massive bloat in the datasource (unless you delete previous records after modifications). I can see the benefit of using immutable objects, but in this sense, I can't ever see a useful case for using immutable objects. Is this wrong?

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  • A Wonderful Comment From a Very Inflential Microsoft Technology Company's Owner

    - by TheSilverlightGroup
    The Silverlight Group has been so very busy taking on state-of-the-art Silverlight development with huge, Fortune 500 companies! We have a great pool of talent, & if any of you Silverlight &/or Blend/UI/UX people are interested in joining us, our toll-free number is 1-888-863-6989. I'd like to point out that Nubifer, Inc.'s CEO, Chad Collins, http://channel9.msdn.com/posts/sureshs/Nubifer-cloud-solution-on-Windows-Azure/ , called our company "The Flagship Company for Silverlight Development"...thank you, Chad, as I see you at the same level for Cloud Computing. -See the SilverLIGHT!

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  • How to send packets via a pptp vpn tunnel?

    - by Phill
    I'm trying to send certain port traffic through my ppp0 interface it's a pptp vpn tunnel, First, I'm using a wireless usb interface, I connect up to my access point, then I initiate my vpn, there is a connection but I do not channel all connexions through that, nor do I want to, so, say I want to channel all port 80 packets through my vpn (interface dev ppp0). I first run: iptables -t mangle -A OUTPUT -p tcp --dport 80 -j MARK --set-mark 0xa to mark the correct packets then I add a table named vpn_table, I then add ip route add default dev ppp0 table vpn_table when I do that traffic begins to dribble through the ppp0, but no pages load. I supose I must have caused some sort of coflict, or the route I'm adding in vpn_table isn't quite right. I'm not sure, I think I'm marking the packets correctly but I can't be sure of that either. UPDATE: I think i've got part of the issue solved: running tcpdump -i ppp0 showed me that indeed there was outgoing requests via ppp0, now, there is never a response, and pages do not load with using that interface..i'm still missing something.

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  • Pls help Installation has ruined laptop

    - by user287694
    Hi this was my time using Linux. So I installed Ubuntu from Windows 7 via USB. After booting into Ubuntu I proceeded to do a full install over windows. This seemed to be going fine but at the point where I was to sign up to Ubuntu one it froze. After awhile maybe 30 mins I realised nothing was going to happen, so I restarted. Now after the bios options bit passes all I get is a prompt flashing at the top left of a black screen. I have tried booting up via USB option but nothing happens, I have tried this 6 or 7 times with fresh usb each time and also with lubuntu. I'm not sure if I have correctly made a live usb obviously I believe I have been but being new I can't guarantee this. Can anyone help me get some functional out of my laptop. Thanks Ben

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  • Looking for reading material on application architecture with web UI

    - by toong
    I'm looking for articles (or other reading material) on the topic of fat client applications with a web UI layer. Open-source projects that use this architecture would be very interesting too. Such an application would embed one (or more) browser-window(s) (chromiumembedded for example). You would need bidirectional communication between your web-UI and your domain model/services. I think this allows quick prototyping the UI, a clean separation between logic and UI and potentially easier portability across platforms (compared to WinForms for example). But that is just my view, I was looking for the view of people who have been on that road. An example of an application using a web-ui layer is Light Table. Unfortunately it is not open source (at this point?).

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  • Professional Development – Difference Between Bio, CV and Resume

    - by Pinal Dave
    Applying for work can be very stressful – you want to put your best foot forward, and it can be very hard to sell yourself to a potential employer while highlighting your best characteristics and answering questions.  On top of that, some jobs require different application materials – a biography (or bio), a curriculum vitae (or CV), or a resume.  These things seem so interchangeable, so what is the difference? Let’s start with the one most of us have heard of – the resume.  A resume is a summary of your job and education history.  If you have ever applied for a job, you will have used a resume.  The ability to write a good resume that highlights your best characteristics and emphasizes your qualifications for a specific job is a skill that will take you a long way in the world.  For such an essential skill, unfortunately it is one that many people struggle with. RESUME So let’s discuss what makes a great resume.  First, make sure that your name and contact information are at the top, in large print (slightly larger font than the rest of the text, size 14 or 16 if the rest is size 12, for example).  You need to make sure that if you catch the recruiter’s attention and they know how to get a hold of you. As for qualifications, be quick and to the point.  Make your job title and the company the headline, and include your skills, accomplishments, and qualifications as bullet points.  Use good action verbs, like “finished,” “arranged,” “solved,” and “completed.”  Include hard numbers – don’t just say you “changed the filing system,” say that you “revolutionized the storage of over 250 files in less than five days.”  Doesn’t that sentence sound much more powerful? Curriculum Vitae (CV) Now let’s talk about curriculum vitae, or “CVs”.  A CV is more like an expanded resume.  The same rules are still true: put your name front and center, keep your contact info up to date, and summarize your skills with bullet points.  However, CVs are often required in more technical fields – like science, engineering, and computer science.  This means that you need to really highlight your education and technical skills. Difference between Resume and CV Resumes are expected to be one or two pages long – CVs can be as many pages as necessary.  If you are one of those people lucky enough to feel limited by the size constraint of resumes, a CV is for you!  On a CV you can expand on your projects, highlight really exciting accomplishments, and include more educational experience – including GPA and test scores from the GRE or MCAT (as applicable).  You can also include awards, associations, teaching and research experience, and certifications.  A CV is a place to really expand on all your experience and how great you will be in this particular position. Biography (Bio) Chances are, you already know what a bio is, and you have even read a few of them.  Think about the one or two paragraphs that every author includes in the back flap of a book.  Think about the sentences under a blogger’s photo on every “About Me” page.  That is a bio.  It is a way to quickly highlight your life experiences.  It is essentially the way you would introduce yourself at a party. Where a bio is required for a job, chances are they won’t want to know about where you were born and how many pets you have, though.  This is a way to summarize your entire job history in quick-to-read format – and sometimes during a job hunt, being able to get to the point and grab the recruiter’s interest is the best way to get your foot in the door.  Think of a bio as your entire resume put into words. Most bios have a standard format.  In paragraph one, talk about your most recent position and accomplishments there, specifically how they relate to the job you are applying for.  If you have teaching or research experience, training experience, certifications, or management experience, talk about them in paragraph two.  Paragraph three and four are for highlighting publications, education, certifications, associations, etc.  To wrap up your bio, provide your contact info and availability (dates and times). Where to use What? For most positions, you will know exactly what kind of application to use, because the job announcement will state what materials are needed – resume, CV, bio, cover letter, skill set, etc.  If there is any confusion, choose whatever the industry standard is (CV for technical fields, resume for everything else) or choose which of your documents is the strongest. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: About Me, PostADay, Professional Development, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • Collision filtering techniques

    - by Griffin
    I was wondering what efficient techniques are out there for mapping collision filtering between various bodies, sub-bodies, and so forth. I'm familiar with the simple idea of having different layers of 2D bodies, but this is not sufficient for more complex mapping: (Think of having sub-bodies of a body, such as limbs, collide with each other by placing them on the same layer, and then wanting to only have the legs collide with the ground while the arms would not) This can be solved with a multidimensional layer setup, but I would probably end up just creating more and more layers to the point where the simplicity and efficiency of layer filtering would be gone. Are there any more complex ways to solve even more complex situations than this?

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  • Le futur du C++, présenté dans une vidéo de Herb Sutter

    Le Futur du C++ Hier, Herb Sutter a dévoilé plusieurs annonces importantes pour l'avenir du C++. Notamment les dates des prochains standards, qui ont finalement été décidées. Il a tout d'abord présenté de façon simple l'organisation du processus de standardisation : [IMG]http://www.developpez.net/forums/attachments/p104980d1351950252/c-cpp/cpp/ressources-cpp/news-futur-cpp/iso-cpp-organization.png/[/IMG] Chaque SG est un groupe de travail qui peut comprendre jusqu'à 40 personnes. Ils étudient les besoins spécifiques à leur domaine afin de proposer la conception d'une fonctionnalité majeure. La conception est ensuite améliorée et mise au point par les groupes Evolution qui est responsable de l'évolution du langa...

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