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• Are the Ubuntu ISO images updated From release .ubuntu.com

  - by tijybba

  Just got idea from this(may not be related though) question however. Are the ISO images from the official site updated with updates in Core Ubuntu system , like Kernel Updates , desktop Environment Updates(unity), i mean Updates of BASE system including X-org, Office suite, Package Manager , Update manager or Gnome Base Modules, those released in update Branches like precise-Updates branch. The reason i am asking this is , if i download the ISO image of Ubuntu 12.04 Say after two or three months from release , i have to do an update of approximately 200~300 MB's size. So why are these ISO images not updated to recent updates, i am aware that all of the components are not updated at the same time , but let's say after One month from actual release ( Both LTS and normal releases), the updated components can be added to form a Updated ISO in regular intervals, which provides new users to use latest versions and features with improved stability and less bandwidth Consumption. I am not mentioning the idea of comparison to Rolling Release , or External PPA's added updates , and neither Netinstal but the ISO of updated Packages .This can be provided as optional download. Since my question is within the boundary of Official updates releases so stability could not be the reason. I guess there are custom packagers out there , but having an official option would be better. It helps in distributing Newest ISO OS which impresses a lot new users , since it makes availability of newer features and a faster system ofcourse. Another reason of asking this is here. Edit: Since almost all new (Desktop) users download the Default ISO's having one or few issue , which may have been corrected in following updates. But most of new laptop users i encountered gave up because of it , so should i suggest ,for laptop not listed on Certified H/W list , to try daily Builds , if needed.

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• Should a stack trace be in the error message presented to the user?

  - by Vilx-

  I've got a bit of an argument at my workplace and I'm trying to figure out who is right, and what is the right thing to do. Context: an intranet web application that our customers use for accounting and other ERP stuff. I'm of the opinion that an error message presented to the user (when things crash) should include as much information as possible, including the stack trace. Of course, it has to start with a nice "An Error has occurred, please submit the below information to the developers" in large, friendly letters. My reasoning is that a screenshot of the crashed application will often be the only easily available source of information. Sure, you can try to get a hold of the client's systems administrator(s), attempt to explain where your log files are, etc, but that will probably be slow and painful (talking to the client representatives mostly is). Also, having an immediate and full information is extremely useful in development, where you don't have to go hunting through the log files to find what you need on every exception. (But that could be solved with a configuration switch.) Unfortunately there has been some kind of "Security audit" (no idea how they did that without the sources... but whatever), and they complained about the full exception messages citing them as a security threat. Naturally, the clients (at least one that I know of) has taken this at face value and now demands that the messages be cleaned. I fail to see how a potential attacker could use a stack trace to figure anything out he couldn't have figured out before. Are there any examples, any documented proof of anyone ever doing that? I think that we should fight this foolish idea, but perhaps I'm the fool here, so... Who's right?

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• Electronics 101 for kids: littleBits review

  - by Daniel Cazzulino

  I'm always on the lookout for cool toys that can empower my kids (9, 6 and 2yo) to be creative and break the mold of being just consumers of other's ideas. I recently came across littleBits while watching a TED video of their creator. I was immediately hooked. It seemed like the perfect blend of simplicity and self-learning that I was looking to get my kids into electronics. So I went ahead and purchased the kit from SparkFun and a bunch of standalone parts (&quot;bits&quot;) from the site itself. There are also a bunch of videos and pictures on their site to get a better idea of what they are, as well as multitude YouTube videos. This weekend I gave them to my kids, and coincidentally, we also travelled to my hometown and they got to share them too with their cousins. Man, what a blast it was! I decided to approach this &quot;toy&quot; just like one of the iPod/iPad games I buy for them: &quot;How it's used? I've no idea! I just heard it was great, you go figure it out!&quot;. And figure it out they did....Read full article

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• Character movement on a 2D tile map

  - by Chris Morris

  I'm working at making a HTML5 game. Top down, closest thing I can equate it to is the gameboy zeldas, but open world and no rooms. What I have so far is a procedurally generated map in a multi dimensional array. And a starting position on the map. Along with this I have an array of movable and non movable tile ID's. I also have a class for my player and have him being rendered out in the center of the starting tile. My problem however is getting the movement sorted out for the player. I want to be able to have the character free move around the map (pixel by pixel essentially) ontop of this 2D generated world. Ideally this would allow the user to move around the walk able area of the canvas. this is simple enough for me to do, but I am having problems now moving the world. If the user is 20% from the edge of the screen i want the world to start panning in the direction the player is heading. But I'm rather lacking in ideas of how to do this. I've looked around for some tutorials, but am coming up blank on ideas of how to generate the playable area (zoomed in) and to then move this generated area under the player when they reach near the end of the screen. My current idea was to generate a certain amount of tiles full size to fill the screen and place the player i the middle. Then when the user approaches the edge of the screen start generating the tiles offset by the distance moved and the direction. I can kind of see this working but I really have no idea if this is the best or easiest to code of methods for generating the world. sorry for the lack of code but I'm still just in the theory stages of working this all out.

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• How to highlight non-rectangular hotspots?

  - by HuseyinUslu

  So my question is highly related to Creating non-rectangular hotspots and detecting clicks. Yet again, I've irregular hot-spots (think the game Risk). So basically, we can detect clicks on these hot-spots easily using color key mapping as discussed in above question which I don't have any problems implementing (which is also covered here in details). The problem is about highlighting these irreguar hotspots. So let me explain the question a bit more - the above color key mapping guide uses this as a world map: Then the author color-maps the imaginary countries: Now we can now detect the country the pointer is over. In the same article author mentions outlining countries on mouse-over. Though to get the effect, he creates unique border assets for each country - like: For the game I'm working on I'm using the same color-key mapping idea to detect hot-spots, but I didn't like the way of highlighting hot-spots. Coloring all the hot-spots is already a time-consuming job for me - as I have 25+ hot-spots for each map. Further, the need to have 25 unique border/highlight asset per hot-spot doesn't sound right. Anyone have a better idea/suggestion on highlighting these hot-spots?

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• Event notifications for Reporting Systems

  - by Marc Schluper

  The last couple of months I have been working on an application that allows people to browse a data mart. Nice, but nothing new. In this context I have an idea that I want to publish before anyone else patents it: event notifications. You see, reporting systems are not used as much as we’d like. Typically, users don’t know where to look for reports that might interest them. At best, there are some standard reports that people generate every so often, i.e. based on a time trigger. Or some reporting systems can be configured to send monthly reports around, for convenience. But apart from that, the reporting system is just sitting there, waiting for the rare curious user who makes the effort to dig a bit for treasures to be found. Wouldn’t it be great if there were data triggers? Imagine we could configure the reporting system to let us know when something interesting has happened. It would send us a message containing a link that would take us to the relevant section of the reporting system, showing a report with all the data pertaining to that event, preparing us for proper actions. Here in the North West this would really be great. You see, it rains here most of the time from October to June, so why even check the weather forecast? But sometimes, sometimes it snows. And sometimes the sun shines. So rather than me going to the weather site and seeing over and over again that it will be raining, making me think “why bother?” I’d like to configure the weather site so that it lets me know when the rain stops. Now, hopefully nobody has patented this idea already. Let me know.

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• Exchange 2010 install locks out high level accounts

  - by tearman

  Basically, when we installed Exchange 2010 alongside our Exchange 2003 server (we assume), this is what caused our problem. The Exchange 2010 server is not active, just running on the domain. What's actually going on is that user groups like Enterprise Admins are getting a single deny flag on Full Control over mailboxes currently residing on the Exchange 2003 server which is preventing any of us from making changes. It says these permissions are inherited from the Parent Object, but we have no idea which one that is. Any idea on how to go about fixing this?

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• What is the safest way to remove a swap partition?

  - by user212062

  I am running Ubuntu 12.04 on a 64-bit HP laptop with a 16 GB flash drive. I do not have a working hard drive right now. When I installed Ubuntu, I created a 2 GB swap partition on sdb1. I have since learned that swap partitions are generally a bad idea on flash drives, so I would like to use my swap space for my other partitions. You can see my partition scheme in the link below. I have read that I just have to comment sdb1 out of the fstab file, boot from a GParted live CD, select swapoff for sdb1, delete/merge with other partition, and everything's good. But, I've also read that messing with sdb1 can change the UUID of sdb2 or sdb3 and cause problems. Is this true? Does initramfs use swap at all? Also, when I get Ubuntu running on my laptop with an internal hard drive, does the swap partition help that much? I have 6 GB of DDR3. Does the rule of 1.5xActual RAM still apply? It seems like quite a bit to me. Thanks for the help! UPDATE: I have removed swap. The process I followed is: Right click swap partition in GParted and selected swapoff. Used # to comment the swap partition out of fstab. I tried to boot from a live GParted CD, but I kept getting an error, so I ran GParted in Ubuntu. Deleted swap partition in GParted. Unmounted /windows. Expanded /windows to take the remaining space. Mounted /windows. The / and /windows partitions each kept their own names and UUIDs, and everything is running fine. I have never seen any swap space being used before, and I don't intend to use the hibernate function, so I think removing swap was a good idea.

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• Proportional speed movement between mouse and cube

  - by user1350772

  Hi i´m trying to move a cube with the freeglut mouse "glutMotionFunc(processMouseActiveMotion)" callback, my problem is that the movement is not proportional between the mouse speed movement and the cube movement. MouseButton function: #define MOVE_STEP 0.04 float g_x=0.0f; glutMouseFunc(MouseButton); glutMotionFunc(processMouseActiveMotion); void MouseButton(int button, int state, int x, int y){ if(button == GLUT_LEFT_BUTTON && state== GLUT_DOWN){ initial_x=x; } } When the left button gets clicked the x cordinate is stored in initial_x variable. void processMouseActiveMotion(int x,int y){ if(x>initial_x){ g_x-= MOVE_STEP; }else{ g_x+= MOVE_STEP; } initial_x=x; } When I move the mouse I look in which way it moves comparing the mouse new x coordinate with the initial_x variable, if xinitial_x the cube moves to the right, if not it moves to the left. Any idea how can i move the cube according to the mouse movement speed? Thanks EDIT 1 The idea is that when you click on any point of the screen and you drag to the left/right the cube moves proportionally of the mouse mouvement speed.

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• How to set up a staging apt repository to securely manage upgrades

  - by andreash

  Hello, I would like to be able to run automatic apt-get upgrade (once per hour) on our servers (Ubuntu 10.04), so that I don't have to do it manually on all of them (about 15). However, for production machines, that's not a good idea ... So here's my idea: Set up a local repository for all 'approved' updates for critical packages. I would then push updated packages from upstream to our local repo after I tested them, and all servers could automatically (apt-cron?) upgrade from this repository. So my question is this: How do I configure apt on the clients so that they use the local repository only for all packages which exist on the local repository, and the upstream one for all other packages? Does this actually make sense? Or am I missing something? Anyways, thanks for your insight! Andreas.

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• Use Mac Pro as time machine, server and editing station?

  - by Dan

  Background: My fiancée needs a Mac Pro for movie editing and rendering. I need a web server and a backup solution for my MacBook Pro. Idea We thought we could split the costs of the Mac Pro and set it up to act as both a web server and a backup device. Question Is this a good idea? Specifically: Is it easy to set it up to incrementally backup one or several laptops over wifi? And what software would you recommend? Is it silent and stable enough to run a web server continuously? Will it manage all this, including simultaneous editing? Thanks.

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• Automatic Generalization

  - by Nick Harrison

  I have been interested in functional programming since college. I played around a little with LISP back then, but I have not had an opportunity since then. Now that F# ships standard with VS 2010, I figured now is my chance. So, I was reading up on it a little over the weekend when I came across a very interesting topic. F# includes a concept called "Automatic Generalization". As I understand it, the compiler will look at your method and analyze how you are using parameters. It will automatically switch to a generic parameter if it is possible based on your usage. Wow! I am looking forward to playing with this. I have long been an advocate of using the most generic types possible especially when developing library classes. Use the highest level base class that you can get away with. Use an interface instead of a specific implementation. I don't advocate passing object around, but you get the idea. Tools like resharper, fxCop, and most static code analysis tools provide guidance to help you identify when a more generalized type is possible, but this is the first time I have heard about the compiler taking matters into its own hands. I like the sound of this. We'll see if it is a good idea or not. What are your thoughts? Am I missing the mark on what Automatic Generalization does in F#? How would this work in C#? Do you see any problems with this?

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• Debian Linux server hangs after a week or so

  - by Alex Flo

  I have 2 Debian Linux 6.0.4 servers that have a strange behaviour: after 5-7-10 days they hang. By this I mean the servers need to be restarted and before that ping won't answer. I've been struggling with this problem for a couple of months now and here's some thoughts/what I tried without being able to solve the problem. I changed the RAM on a server. Being 2 different servers I doubt that it could be something related to hardware as a 3rd identical server won't have this problem. I logged the server load and when it crashes the load is fine (quite low) I cannot find anything in the server logs, logs are fine till the server freezes. I don't have access to console unfortunately. While I have years of admin experience I have never encountered such an issue and right now I have no idea where else to investigate. If you have an idea of what I could try in order to fix the problem please share it with me:-)

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• How to write a blog for SEO purpose

  - by Mathieu Imbert

  I have a photo sharing website, which provides very little textual content. Users can add tags to photos and a description, but it creates a lot of duplicate content, because most of the descriptions will be 'wow', 'lol', ... I don't think I should rely on users to build my SEO. I think it would be a great idea to write a blog, and use it to describe the best photos, start contests, explain themes, in short: create original content that search engines will love. Our website's main URL is like www.domain.com, and our new blog is hosted on blog.domain.com. From a SEO perspective, is it a good idea to keep the blog separate from the main site? This has the advantage to leave the original site unchanged, but will it add any page rank to the www.domain.com? If the blog ranks well it will obviously pass some page rank to the original through links. What do you think is the best option from a SEO perspective? Include the blog in www.domain.com? Or leave it in blog.domain.com?

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• What's the best practice to do SOA exception handling?

  - by sun1991

  Here's some interesting debate going on between me and my colleague when coming to handle SOA exceptions: On one side, I support what Juval Lowy said in Programming WCF Services 3rd Edition: As stated at the beginning of this chapter, it is a common illusion that clients care about errors or have anything meaningful to do when they occur. Any attempt to bake such capabilities into the client creates an inordinate degree of coupling between the client and the object, raising serious design questions. How could the client possibly know more about the error than the service, unless it is tightly coupled to it? What if the error originated several layers below the service—should the client be coupled to those lowlevel layers? Should the client try the call again? How often and how frequently? Should the client inform the user of the error? Is there a user? By having all service exceptions be indistinguishable from one another, WCF decouples the client from the service. The less the client knows about what happened on the service side, the more decoupled the interaction will be. On the other side, here's what my colleague suggest: I believe it’s simply incorrect, as it does not align with best practices in building a service oriented architecture and it ignores the general idea that there are problems that users are able to recover from, such as not keying a value correctly. If we considered only systems exceptions, perhaps this idea holds, but systems exceptions are only part of the exception domain. User recoverable exceptions are the other part of the domain and are likely to happen on a regular basis. I believe the correct way to build a service oriented architecture is to map user recoverable situations to checked exceptions, then to marshall each checked exception back to the client as a unique exception that client application programmers are able to handle appropriately. Marshall all runtime exceptions back to the client as a system exception, along with the stack trace so that it is easy to troubleshoot the root cause. I'd like to know what you think about this? Thank you.

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• HDD situation - what would be best - data and backup

  - by Sam Johnson

  I just installed W8 on an Intel 330 180 GB SSD. I have 3 1TB HDDs. 1 HDD will be external for backup. 2 HDDs are then available for my PC. I do not need 2 TB of storage, so I thought I'd set these up to be exact clones of one another, so that if one dies I have a backup in the computer to go along with my external. Is this a good set up? How best would this be accomplished? I've heard people suggest RAID but I've never done RAID, have no idea what it is, and have no idea how to set it up in my BIOS. Thanks in advance

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• Pitching My Software-Should I Get a Patent? [closed]

  - by Mike

  This Thursday I will be filming for a Canadian TV Show where I will be pitching my software to 5 Canadian Millionaires to invest in. The software is ridiculously basic but it is for sports teams, specifically football and basketball teams. (The show won't air till September) I made this in Adobe Flash using Actionscript. I have been selling the software to sports teams in the USA mostly including University Teams for $20. I have only sold 32 copies ($640), but I don't advertise, I just write articles on the subject. Now my question is this: I have no patent on this software since I have been doing this casually. Is it a bad idea to go onto this TV show and ask them for money for a software patent? Or should I be asking money for marketing/other things? Note: I also have no idea how much I should ask for. I know absolutely nothing about software patents but if it matters no other software exists that does this exact thing (however it could be easily duplicated).

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• Entity Framework and distributed Systems

  - by Dirk Beckmann

  I need some help or maybe only a hint for the right direction. I've got a system that is sperated into two applications. An existing VB.NET desktop client using Entity Framework 5 with code first approach and a asp.net Web Api client in C# that will be refactored right yet. It should be possible to deliver OData. The system and the datamodel is still involving and so migrations will happen in undefined intervalls. So I'm now struggling how to manage my database access on the web api system. So my favourd approch would be us Entity Framework on both systems but I'm running into trouble while creating new migrations. Two solutions I've thought about: Shared Data Access dll The first idea was to separate the data access layer to a seperate project an reference from each of the systems. The context would be the same as long as the dll is up to date in each system. This way both soulutions would be able to make a migration. The main problem ist that it is much more complicate to update a web api system than it is with the client Click Once Update Solution and not every migration is important for the web api. This would couse more update trouble and out of sync libraries Database First on Web Api The second idea was just to use the database first approch an on web api side. But it seems that all annotations will be lost by each model update. Other solutions with stored procedures have been discarded because of missing OData support and maintainability. Does anyone run into same conflicts or has any advices how such a problem can be solved!

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• After upgrading to trusty, ALSA midi connection (aconnect) doesn't seem to work right

  - by SougonNaTakumi

  Previously in kubuntu 13.10 I was able to open vmpk or plug in a midi keyboard, and provided that TiMidity was running in server mode, I could run aconnect [keyboard port (129:0 for vmpk)] 14:0 aconnect 14:0 128:0 and I could play the keyboard and get sound. But now, a while after upgrading to trusty, I tried to do that, and didn't get any sound. TiMidity itself still plays files fine, but if I try to play them with aplaymidi, I still just get silence. Oddly, the midi files are clearly being read. When I ran (where 130:0 was vmpk's input port) aplaymidi -p 130:0 ~/path/to/midi.mid vmpk was highlighting notes on the piano as if it were playing the midi. One time I tried this, TiMidity (?) very briefly played a fraction of a second of the first chord of my song before everything went silent and vmpk just highlighted the first voice on the keyboard as usual. Now the weirdest part of this is that probably about 40% of the time, when I've played at least one note with either aplaymidi or vmpk, when I run aconnect -x I get a sudden burst of a note or chord from my speakers (that is, if I played one note, I get a note; if I played multiple sequential notes, they turn into a chord), as if the notes were being queued up but not being played and that somehow liberated them. I have no idea what's going on there. A little while ago I remember having a problem with Audacity playing wav files sped up and also locking up if I tried to pause it, which it stopped doing when I set the audio devices to the actual audio devices rather than pulse. But now when I checked again, it's doing the opposite: it won't play audio at all and/or acts weirdly if I don't set the audio devices to pulse, and either way will very occasionally randomly do the speeding up thing regardless. Oddly in the midst of what's looking like a pretty screwed up sound system, sound in VLC and Firefox has been working fine and if I play a wav file with aplay ~/path/to/sound.wav that works fine too. Any idea what I could do to figure out what's wrong with ALSA and/or fix it?

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• Running NginX (with Apache) and cPanel/WHM

  - by ub3rst4r

  I was wondering if its a good idea to be running NginX as the webserver (on port 80) and Apache as the reverse proxy (on port 8080) with cPanel/WHM being used as a control panel? I also installed Nginx Admin so the configuration for NginX is managed by WHM. The reason I am asking is because I came across an article (http://kbeezie.com/view/apache-with-nginx/) which explains how to setup Apache as a reverse proxy but it states If you are using a control panel based hosting such as cpanel/whm, this method is not advised. Most of the servers configuration is handled automatically in those cases, and making manual changes will likely lead to problems (plus you won’t get support from the control panel makers or your hosting provider in most cases). Anyone have any past experiences with this and can say if its good/bad idea?

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• "Viral" license that only blocks legal actions of user and developer against each other

  - by Lukasz Zaroda

  I was thinking a lot about software licensing lately, because I would like to do some coding. I'm not an expert in all those licenses, so I came up with my own idea, and before I will put in on paper, I would like to make sure that I didn't reinvent a wheel, so maybe I would be able to use something that exists. Main idea behind my license is to guarantee freedom of use the software, but not "freedom to" (positive) (e.g. freedom to having source code), but "freedom from" (negative) (strictly from legal actions against you). It would be "viral" copyleft license. You would be able to without fear do everything you want with the software (and binaries e.g. reverse engineering), as long as You will include information about author and/or authors, and all derivative works will be distributed with the same license. I'm not interested in anything that would restrict a freedom of company to do something like "tivoization". I'm just trying to accomplish something that would block any legal actions of user and developer, targeted against each other, with the exception of basic attribution. Does exist something like that?

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• How can Highscores be more meaningful and engaging?

  - by Anselm Eickhoff

  I'm developing a casual Android game in which the player's success can very easily be represented by a number (I'm not more specific because I'm interested in the topic in general). Although I myself am not a highscore person at all, I was thinking of implementing a highscore for that game, but I see at least 2 problems in the classical leaderboard approach: very soon the highscore will be dominated by hardcore players, leaving no chance for beginners, who are then frustrated. This is very severe especially in casual games. there is no direct reward for being a loyal player who plays the game over and over again My current idea is to "reset" the highscore every 24 hours (for example) and each day nominate the "player of the day" who then gets a "star". Then there would be some kind of meta-highscore of players with the most stars. That way even beginners might have a chance to be "player of the day" once and continued or repeated play is rewarded much more. The idea is still very rough and there are many problems in the details and the technical implementation but I have a feeling it is a step in the right direction. Do you have creative and new ideas on how to implement highscores? Which games are doing this well / what types of highscores do you find most engaging?

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• Allowing non-admins to run programs as admins on Windows 7

  - by Josh

  On *nix, admins can use the setuid flag to allow non-admins to run certain programs that would otherwise require admin privileges. Is there any way to do something similar in Windows 7? This question has been asked here before for Windows XP, and the answers were generally unsatisfying. I'm wondering if Windows 7 provides a better way. One idea I can think of would be to use Microsoft's Subsystem for UNIX Applications, but I'd rather not install that on every user's system if I can avoid it. Another idea I can think of (which would work on XP too, but I haven't seen it mentioned anywhere) would be to create a RunAsAdmin application that runs as a service, that takes a whitelist of "safe" apps and can be asked (from a command line, batch file or script) to run any program on the list as LocalSystem or whatever account the service uses. Is this possible? Are there any solutions that aren't as clunky as those? Or, has anyone implemented either of the above techniques successfully?

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• SSH tunnel & Rsync thru two proxy/firewalls

  - by cajwine

  Screnario: [internal_server_1]AA------AB[firewall_1]AC----+ 10.2.0.3-^ ^-10.2.0.2 | internet 10.3.0.3-v v-10.3.0.2 | [internal_server_2]BA------BB[firewall_2]BC----+ Ports AC,BC has valid internet addresses. All systems run linux and have root acces to all. Need securely rsync internal_server_1:/some/path into internal_server_2:/another/path My idea is make ssh secure tunnel between two firewalls, e.g. from firewall_1 firewall1# ssh -N -p 22 -c 3des user2@firewall_2.example.com -L xxx/10.3.0.3/xxxx and after will run rsync from internal_server_1 somewhat like: intenal1# rsync -az /some/path [email protected]:/another/path I don't know how to make a correct ssh tunnel for rsync (what ports need tunnel) and to where i will make the rsync? (remote comp address in case of ssh tunnel) Any idea or pointer to helpfull internet resource for this case? thanx.

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• Go/Obj-C style interfaces with ability to extend compiled objects after initial release

  - by Skrylar

  I have a conceptual model for an object system which involves combining Go/Obj-C interfaces/protocols with being able to add virtual methods from any unit, not just the one which defines a class. The idea of this is to allow Ruby-ish open classes so you can take a minimalist approach to library development, and attach on small pieces of functionality as is actually needed by the whole program. Implementation of this involves a table of methods marked virtual in an RTTI table, which system functions are allowed to add to during module initialization. Upon typecasting an object to an interface, a Go-style lookup is done to create a vtable for that particular mapping and pass it off so you can have comparable performance to C/C++. In this case, methods may be added /afterwards/ which were not previously known and these new methods allow newer interfaces to be satisfied; while I like this idea because it seems like it would be very flexible (disregarding the potential for spaghetti code, which can happen with just about any model you use regardless). By wrapping the system calls for binding methods up in a set of clean C-compatible calls, one would also be able to integrate code with shared libraries and retain a decent amount of performance (Go does not do shared linking, and Objective-C does a dynamic lookup on each call.) Is there a valid use-case for this model that would make it worth the extra background plumbing? As much as this Dylan-style extensibility would be nice to have access to, I can't quite bring myself to a use case that would justify the overhead other than "it could make some kinds of code more extensible in future scenarios."

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