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• Broadcasting webinars to and from Ubuntu

  - by Chris Wilson

  I've recently attended an online workshop using Citrix GoToWebinar, a service that allows someone to broadcast their desktop and audio out to all members connected to the presentation as well as receive audio and screencasts from those attendees , and the experience was unbelievable, and I was wondering if there was any such service/software available on Ubuntu. Points to consider include, but are not limited to: Web services or local applications. Free (as in beer) or paid. Free (as in speech) or proprietary. Ease of use Ease of setup Any other point that anyone can thing of

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• What is a good design pattern and terminology for decoupling output?

  - by User

  I have a program where I want to save some data record. And I want the output type to be flexible such that I could save the data record to a text file, xml file, database, push to a webservice. My take on it would be to create an interface such as DataStore with a Save() method, and the concrete subclasses such as TextFileDataStore, DatabaseDataStore, etc. What is the proper name/terminology for this type of pattern (I'm using the term "DataStore", log4net names things "appenders", .net they talk about "providers" and "persistence")? I want to come up with good class names (and method names) that fit with a convention if there is one. can you point me to a decent example, preferably in C#, C++, or java? Update Managed to find this stack overflow question, Object persistence terminology: 'repository' vs. 'store' vs. 'context' vs. 'retriever' vs. (…), which captures the terminology part of my question pretty well although there's not a decent answer yet.

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• How to determine collision direction between two rectangles?

  - by Jon

  I am trying to figure out how to determine the direction a collision occurs between two rectangles. One rectangle does not move. The other rectangle has a velocity in any direction. When a collision occurs, I want to be able to set the position of the moving rectangle to the point of impact. I seem to be stuck in determining from what direction the impact occurs. If I am moving strictly vertically or horizontally I manage great detection. But when moving in both directions at the same time, strange things happen. What is the best way to determine what direction a collision occurs between two rectangles?

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• My laptop shuts down when I remove the charger

  - by Hakim0

  Laptop shuts down when charger is removed. As well I get a message when booting up saying disk drive for /media/3936-3939 is not ready or not present. About a week ago I was trying to install a matlab iso file using mount commands etc... I tried mount, fuseiso, and UNETbootin. I have a feeling this may have something to do with message I'm getting from booting up. If anyone can point me in the right direction or help me out. Many thanks.

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• movement of sprites with kinect and xna

  - by pablopp83

  im working on a proyect with kinect sdk and xna 4.0. i need take the position of the hands and draw a sprite over it. im doing it directly and, because of that, i get a "trembling hands" effect. so, i was thinking on make the sprite move from the previous position to the new one, given in every frame by the new hand position. this way, the sprite does not jump from one position to another. this is working just fine, but im using a constant value for the velocity, and i really would like to use a variable velocity given by the difference between the prev and the new position. this is, if the hand move more quickly in the reality, the velocity will be higher. I really dont have a clue on how to make this works. can somebody point me in the right direction? thanks.

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• Determining if a visitor left your server

  - by Jeepstone

  We have an Apache server running a PHP website. The site is an e-commerce shop. We currently use Barclays as the payment provider but are seeing a lot of customers drop out at the point at which we transfer them to the payment gateway (hosted with Barclays) I can see specific instances in the shop where orders have been created but not paid/failed but I need to ascertain if the user has definitely left our server (or just failed to reach Barclays). Is there anything in any of the server/access logs that states when a user transferred to a different domain?

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• Fast lighting with multple lights

  - by codymanix

  How can I implement fast lighting with multiple lights? I don't want to restrain the player, he can place an unlimited number and possibly overlapping (point) lights into the level. The problem is that shaders which contain dynamic loops which would be necessary to calculate the lighting tend to be very slow. I had the idea that if it could be possible at compiletime to compile a shader n times where n is the number of lights. If the number n is known at compiletime, the loops can be unrolled automatically. Is this possible to generate n versions of the same shader with just a different number of lights? At runtime I could then decide which shader to use for which part of the level.

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• WHM local/external mail server confusion

  - by BWRic

  We host several websites on the same server using WHM but this seems to confuse the mail routing when someone has their own external mail servers - it looks locally. We have our own email accounts hosted on the server. When creating an account for a client on the same server WHM adds the default entries to the DNS for that account. However this client has their own mail servers elsewhere. But when sending them an email it never reaches that external server - it just sees the local, incorrect one. I realise I can update my DNS to point to the external server, but this means I am copying their settings and if they are changed, then I will also need to update mine. Are there some settings I can use to force it to use the external servers without having to copy the settings.

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• partitioning ssd +hdd

  - by ALdaperan

  I recently bought an ssd drive 128 gb and i would like yo have your suggestions on partitiong and installing ubuntu 12.10 on it. First of all my drives are : HDD 640 Gb SSD Samsung 830 series 128 Gb Whats the best partitiong for theese drives ? 128 Gb is sure enormous amount of space only for / (root) . Is it a good choice if i make 2 partitions on ssd (20 Gb / and 100 /home) and leave hdd as backub drive for my data (files,movies,music etc) ? In this case what mount point must have hdd ? Can you suggest me the best partitiong for my drives ?

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• Intel dément trouver Windows 8 pas assez finalisé, l'OS serait même l'une des meilleures choses qui soient arrivées à la société

  Windows 8 ne serait pas encore finalisé pour le patron d'Intel qui estime que des améliorations sont encore nécessaires Microsoft va officiellement lancer Windows 8 le 26 octobre avec une nouvelle génération de tablettes et PC fonctionnant sous le système d'exploitation. Mais, il semblerait que l'OS ne soit pas encore totalement finalisé. C'est en tout cas ce que pense Paul Otellini, le PDG d'Intel, selon un article Bloomberg. Le patron du constructeur de microprocesseurs qui est le partenaire le plus proche de Microsoft aurait déclaré lors d'une réunion privée avec son équipe de Taïwan que Windows 8 va être lancé avant d'être finalisé. D'un point de vu comm...

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• Domain name at different host to website

  - by Corbula

  I have someone i'm making a website for with a domain name and current website hosted at fasthosts. I've built them a website hosted at a different host, unlimitedwebhosting. The website i've made them is in a directory like this. www.mysite.com/dev/0002 So fasthosts: Is the registrar for the domain name, it also has all of the email addresses and their current site. unlimitedwebhosting: Has the new site in a sub directory, like .com/dev/0002 Is it possible to keep the domain name and email addresses all hosted at fasthosts and to have the new website hosted in my unlimitedwebhosting account and to somehow have the domain point to the new website?

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• Oracle sort ADF Essentials, une version gratuite de son Framework MVC de développement Java

  Oracle sort ADF Essentials une version gratuite de son Framework MVC de développement Java Oracle a publié une version gratuite de son Framework de développement Java ADF (Application Development Framework). Oracle ADF est une plateforme de développement reposant sur le standard JEE (Java Enterprise Edition) et les technologies open source, permettant de simplifier et accélérer la mise au point d'applications orientées services. ADF est basé sur l'architecture MVC (Model View Controller) et implémente par défaut des routines couramment utilisées comme l'authentification utilisateur, des couches de sécurité, etc. Le Framework est utilisé en interne par Oracle pour plusieurs de se...

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• Predicted target location

  - by user3256944

  I'm having an issue with calculating the predicted linear angle a projectile needs to move in to intersect a moving enemy ship for my 2D game. I've tried following the document here, but what I've have come up with is simply awful. protected Vector2 GetPredictedPosition(float angleToEnemy, ShipCompartment origin, ShipCompartment target) { // Below obviously won't compile (document wants a Vector, not sure how to get that from a single float?) Vector2 velocity = target.Thrust - 25f; // Closing velocity (25 is example projectile velocity) Vector2 distance = target.Position - origin.Position; // Range to close double time = distance.Length() / velocity.Length(); // Time // Garbage code, doesn't compile, this method is incorrect return target.Position + (target.Thrust * time); } I would be grateful if the community can help point out how this is done correctly.

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• Can decoupling hurt maintainability in certain situations?

  - by Ceiling Gecko

  Can the fact that the business logic is mapped to interfaces instead of implementations actually hinder the maintenance of the application in certain situations? A naive example with the Java's Hibernate framework would be, that for example (provided I don't have the whole code-base in my head, the project structure is a mess and classes are named with arbitrary names) if I wish to see what's going on in a certain DAO, to see if it actually is doing what it's supposed to do, then instead of traversing backwards up the tree from the point where the data service is invoked (where the tree will end in an interface with no implementation details whatsoever apart from the signature) I have to for example go and look for a configuration XML file to see which class is mapped to said interface as the implementation before being able to access the actual implementation details. Are there any situations where having loose coupling can actually hurt maintainability?

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• Advice: should I focus on PHP + MySQL, or split my time for more JS and CSS? [closed]

  - by fakaff

  I started learning web development about three months ago (in between working my regular job), and I'm finally starting to get some vague, distant notion of understanding. I find the server-side stuff the most interesting; though I've not gone anywhere near Apache quite yet, which I assume will be necessary at some point. As cool as toying around with visuals and UI is, programming and database stuff inspires me with new ideas and possibilities every minute (I've even bought, on a whim, a wonderfully dry bunch of books on database theory and relational algebra). And whatever CSS or Javascript tutorial I'm doing, it often feels like a distraction from the PHP/MySQL stuff I'd rather be playing with. For someone like me who's just starting out, which is the most advisable course of action? (in terms of being marketable as a programmer): To focus on PHP and SQL stuff exclusively, and only once I master those to diversify my skills. To first learn all three (PHP/MySQL, Javascript, CSS and design) and only once I'm fluent in all three focus on PHP and databases?

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• It is worth planning before jumping in the code?

  - by Rushino

  I always thought that planning is important for a game. But i don't know at which point. Some are telling me to code instead of planning but i feel like its still important because when you will be in the code you will know what to do next more easily. I am currently working on a game that will have lots of content so i decided to start a design document introducing thoses content and at a side-level i am doing proofs of concept to check if it can be done. Parts of each proofs of concept then could be used later in the real game. EDIT: I am working alone on this project. So my question is : It is worth planning before jumping in the code ? Im still interested to know what others have to say about this. Cause i still get some poeple saying i should code instead of thinking.. so what your opinion on this ?

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• I want to try and find an RFC for Business Listings.

  - by nc01

  I'm trying to figure out how to find out if there's a good standard format for sharing business information such as: Business Name Address - well-defined fields Lat,Lng Coords Business Type - maybe from a well-defined enum, my starting point contains Retail,Food,Drink,Coffee,Service Hours of operation - including a spot for 'except laksdasd' or 'sometimes we open late' which could be just plain language Business Keywords - don't know if this is asking too much. how well do http meta tags work in practice? So, if no such thing exists, is this something I can submit to IETF? I can't currently find it on http://www.rfc-editor.org/cgi-bin/rfcsearch.pl , and vCard doesn't suit my needs.. Thanks!

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• Why do Git users say that Subversion does not have all the source code locally?

  - by johnny

  I'm only going on what I've read on SO, so forgive me, but all I read says that one major advantage of Git over Subversion is that Git gives all the source code to the developer locally, not having to do anything on the server. With my limited using of SVN and TortoiseSVN, I had all the source code, or at least I thought I did. For example, I have a website. I upload it to SVN. I am still running my website locally, aren't I? If someone submits a change and I'm not connected, it wouldn't matter if I had Git or not, until I reconnect to the server. I do not understand. I'm not asking for a rehash of one vs. the other except this one point.

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• Can you be a programmer and Business manager at the same time?

  - by the_knight5000

  Hello all, I think I'm struggled in some situation! We are a new start-up with 5 employees (2 Programmers). I'm the Technical Manager and that was so fine! Now I can see the fingers point to me to take the control of everything, as I've the big vision of what our organization do and play the role of CEO or General Manager! I want to, but I've no idea if it would be risky to our organization to make such a decision? How would managerial interrupts affect the technical productivity? Any tips or previous experience about such situation would help :) Thanks in advance!

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• Topics for covering in-depth programming knowledge

  - by black_belt

  I pursued my bachelors' degree in business administration, but my interest in Information Technology led me to acquire some knowledge of PHP programming and MySQL database. I find programming so interesting that I haven't applied for any job since my graduation. Currently I am staying home and just trying to acquire in-depth knowledge of PHP programming. So far I have developed couple of websites and web applications including Inventory+ Point of Sale Software and an Accounting system for small organizations. I aim to have knowledge that a Computer Science graduate should have, and for that I want to read books but I have no idea where to start from. Could you please suggest me some books and topics that I should study on? Thanks a lot :)

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• Diving into the RichTextBox (Silverlight TV #31)

  Mark Rideout, Program Manager on the Silverlight product team, joins John to dive deep into many of the RichTextBox control's features. Mark has worked on the text aspects of Silverlight since the first version. Here are just a few of the areas that Mark covers: Overview of RichTextBox vs. TextBlock and TextBox for rich content Wire-up logic for applying formatting Inline UI elements Using text position to point for simple and complex operations   Basic "position...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Ubuntu version on external hardrive that shows up in GRUB?

  - by RPi Awesomeness

  I was wondering, is it possible to have Ubuntu installed on an external harddrive and still have it show up in GRUB? Of course, you wouldn't be able boot the other HDD OS unless it was connected, but would this work? I googled 'external HDD OS show in GRUB' and 'have external HDD show up in GRUB' but they didn't bring up anything. Does anyone have any resources to point me to? I can see this as being useful for testing out new releases or having multiple OSs installed without having to go through the BIOS boot choice. Thanks!

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• Detecting right-click on XAML GridView control item

  - by mbrit

  Leaving aside why you would ever want to do this in a touch-centric world, here's how you tell if the right-mouse button has been clicked on a GridView in XAML/WinRT/Metro-style. You have to retrieve a point relative to the UI element you're in, and then query its properties. void itemGridView_PointerPressed(object sender, PointerRoutedEventArgs e) { if (e.GetCurrentPoint(this).Properties.IsRightButtonPressed) { this.BottomAppBar.IsOpen = true; } } (The reason why you might want to do this can be explained by looking at any of the built-in Win8 apps. You can right-click any of the items on any list to bring up a context-sensitive AppBar.)

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• If I am developing a hosted payments page, what should the infrastructure look like?

  - by marcamillion

  If I am not storing credit card info, do I have to be concerned with PCI-compliance? I will be using a payment processor with a bank in my country. Literally just taking the credit card info and passing it to the gateway and processor. I would love to get an idea of the various technologies I might need to consider from an software architectural point of view. What are the best practices in terms of accepting credit cards and reducing fraud risk on my end? I will be creating the app in Rails.

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• 9 millions de téléchargements perdus par Firefox à cause de l'absence du Ballot Screen dans Windows 7, la part d'IE progresse

  Firefox aurait perdu 9 millions de téléchargements à cause de l'absence du Ballot Screen dans Windows 7 le navigateur baisse tandis qu'IE progresse NetApplications, le cabinet d'analyse du Web vient de publier son traditionnel classement mensuel des parts de marché des navigateurs. Le premier constat est que Firefox enregistre une légère baisse entre octobre et septembre de 0,09 point avec une part de 19,99%, qui lui permet de garder sa deuxième place. Le navigateur qui avait enregistré sur plusieurs mois des pertes semble se stabiliser. En effet, entre février 2011 et juillet 2012, Firefox a perdu plus de 3,7% de part de marché, passant de 23,72 % à moins de 20%.

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