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• << and >> in C++

  - by JacKeown

  I don't quite understand what this means...I'm just learning C++ from my very very very basic Python experience...and so this may be a very stupid question. My question is...say you have your classic "Hello World" program and you have the line: cout<<"Hello World!"<<endl; what does the << mean...because I was just looking at using input in C and saw that you'd do something like: int i; cini; and I noticed that it has instead of << and I've read that those are bitwise shifts...and I don't exactly understand what those are...but I think it might be different here...Help...Thanks in advance

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• Elastic Collision Formula in Java

  - by Shijima

  I'm trying to write a Java formula based on this tutorial: 2-D elastic collisions without Trigonometry. I am in the section "Elastic Collisions in 2 Dimensions". In step 1, it mentions "Next, find the unit vector of n, which we will call un. This is done by dividing by the magnitude of n". My below code represents the normal vector of 2 objects (I'm using a simple array to represent the normal vector), but I am not really sure what the tutorial means by dividing the magnitude of n to get the un. int[] normal = new int[2]; normal[0] = ball2.x - ball1.x; normal[1] = ball2.y - ball1.y; Can anyone please explain what un is, and how I can calculate it with my array in Java?

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• the problem i have now visual studio team know.

  - by anirudha

  once upon a time i have a problem in visual studio that i declare here. they never thing what i want to say and i can't tell them clearly as they want. today i got the mail from visual studio 2010 connect that they tell me " problem can be solved in future version" that's a good thing i feel something better because anyone can't believes but i tell them many time. atleast they hear what i want to say. but i never believe on them even before that i get the new version of visual studio. means may be believe possible after the new version. because i know that they are slow slow and slow. last time i found that they tell that they launch visual studio on 20 march  but atleast they launched them on 12 april as adobe lauch their other product in creative series the link for connect is here

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• Database Insider - July 2012 issue

  - by Javier Puerta

  The July issue of the Database Insider newsletter is now available. (Full newsletter here) INFORMATION INDEPTH NEWSLETTERDatabase Insider Edition - July 2012 Optimize Your Communications Applications on Oracle ExadataThe communications industry is experiencing explosive growth, which means that high-performing, scalable, and cost-effective solutions are critical for success. Learn more by accessing white papers, success stories, product information, videos, podcasts, and more. Register now. Oracle Exadata Enables Neuralitic's SevenFlow Application ImprovementsImproves application performance 3x and compression rate/scalability 10x. ElectraCard Services Runs Oracle Exadata on Oracle LinuxAchieves processing speeds greater than 12,000 TPS and increases performance 2x. Read full newsletter here

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• Cloud proxying service

  - by ChristopherJ

  I have an app that mashes up images from Bing image search, it's hosted on Heroku written in rails. The app is client side in javascript, so the mashup is done on an html5 canvas - this means though that if I fetch the images direct from the Bing server, the canvas gets dirty and I can't save it. As a quick work around, i have set up a route on my rails app that simply proxies the request to Bing and passes the result back through. Obviously this is a very poor performance solution and will eat up my dynos very quickly. Can anyone suggest a more suitable option? At the moment I'm thinking maybe Amazon EC2 with apache mod_rewrite rules would be better performing and more cost effective. Is there a cloud service (or an app I could deploy to a cloud service) that would be more appropriate for proxying requests for me so that my javascript can fetch the images without dirtying the canvas?

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• Ubuntu and surround sound

  - by keith

  I'm trying to connect my Logitech x.530 to my Dell studio 1558 and get 5.1 sound. I have 3 jacks and in Windows I automatically could switch between line in adn mic. Which means I could get 5.1 surround over these 3 jacks. Ubuntu does not realise that one of the three jacks should be switched to give sound to the center and LFE speaker. I tried all the tips in the forums, but nothing works. I can only select 4.0 sound in pulse audio. As the dell and the IDT 92hd89e chip for the sound are probably famous laptops I thought there must be someone who has similar issues in the 5.1 sound. I would like to stay at Linux but without this hardware support it's almost impossible.

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• Question about initial interview for job [closed]

  - by JustLikeThat

  So I feel kind of stupid having to ask this but tomorrow I have a phone interview with a good company. Phone interviews themselves not a big deal for me, but having to tell them my salary expectations is. The position that I'm applying for is a mid-level software engineer, I fit all of the requirements (I'm not overly qualified by any means), and I want to be sure I'm not asking for an amount that would be absurd or too little. Now, assuming I get a second interview and have to complete some sort of puzzle/code/work, they may pay me +/- whatever I asked for based upon their evaluation of my work. What I'd like to know, is what is a good amount to ask for? Or am I completely wrong with my assumptions? Either way some advice would be much appreciated!

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• Social Media JSR 357 NOT approved by Executive Committee

  - by alexismp

  JSR 357 (Social Media API) has not passed the initial ballot which means, according to the JCP rules, that "the JSR submitter(s) who may revise the JSR and resubmit it within 14 days". Given the comments associated with the negative votes, it may be challenging for the submitters to address the concerns about the scope assessed by many as being too wide. Standardization is a difficult task and the JCP (the Executive Committee in fact) played its role by pointing out the challenges ahead of such a JSR as it was envisioned by its submitters, and thus the risk of never completing. If anything this proves that the JCP is working as expected. For those disappointed that Java will not get a standard "Social Media API" (for now at least), let me remind you of the recent open-sourcing of DaliCore.

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• how to focus the desktop on unity

  - by user25119

  I'm using Ubuntu 11.10 (unity 4.24.0) and I can't seem to focus the desktop. For example, if I press Mod4+D, the window I had opened stays focused, but the image is see is my wallpaper. If I minimize all windows one by one, the last window I minimize is still focused when the desktop finally appears. This means I can't add desktop icons, nor use the mouse in it. I thought about reporting a bug, but everything works fine on other computers with the latest version of Ubuntu I've used, so I'm wondering about what's happening. Before, when I pressed Mod4+D, the Unity Top Menu would say "Desktop - File Edit ..." and I could use the desktop properly. Thanks in advance!

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• Supporting early versions of Android

  - by Philip Sheard

  What policy do developers have when it comes to supporting earlier versions of Android? I still support Android 2.1 and above, but this means that I am unable to use features such as the action bar. Over 40% of my users are still running versions below 3.0, so I feel somewhat constrained about this. The problem is that 3.x was not very successful, so 2.3.x will be with us for some time. But all new devices will now be shipping with 4.x. I am wondering whether 4.x users are more likely to pay for an app, while most 2.3.x users are just looking.

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• How to update a mesh position base on a pressed key?

  - by steven166

  I have a mesh loaded from a file, like a tiger mesh. At the first time it locates at A position, then if I press a left key, it will moves to B position but the problem is if I press a left key one more time, it will move from B position to C position. It means that the amount I want to move the mesh will base on the current position instead of the first time rendering position. I can do it if I have a array vertices then I just update the vertex buffer, but a mesh loaded from a file does not have an array vertices, so how to do it? Anybody help me, please?

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• Inversion of control in Unity?

  - by user3206275

  I am semi-experienced .NET developer who has just began working with Unity. I am trying to decide on how to make IoC work in Unity 4.X ( I have not yet tested anything), and I wonder what are the good ways of achieving it. This post and its answers states that Ninject won't work with Unity, however it is old. Is it still true? If yes, what are other means of achieving IoC in Unity ? Edit 1 : I am targeting mainly Windows platform. So I don't need platform interoperability, I just need it to work.

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• How to ensure that the domain name you are registering won't have licensing or trademark issues?

  - by pokemarine

  What are the conventions of domain registering? What domains and names someone can use as a brand/name for a website? How to determine if the name selected is available and there will be no legal issues later? Example.: A new website being developed, it needs a name, isn't it? So the team who is responsible for it decides, the name will be "WooLaCocaCola", means I should register the www.woolacocacola.com domain for the site. Let's say the domain is free to register, but that doesn't mean that the name as it is can be used, how can I check something like this?

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• Programming languages with extensible syntax

  - by Giorgio

  I have only a limited knowledge of Lisp (trying to learn a bit in my free time) but as far as I understand Lisp macros allow to introduce new language constructs and syntax by describing them in Lisp itself. This means that a new construct can be added as a library, without changing the Lisp compiler / interpreter. This approach is very different from that of other programming languages. E.g., if I wanted to extend Pascal with a new kind of loop or some particular idiom I would have to extend the syntax and semantics of the language and then implement that new feature in the compiler. Are there other programming languages outside the Lisp family (i.e. apart from Common Lisp, Scheme, Clojure (?), Racket (?), etc) that offer a similar possibility to extend the language within the language itself?

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• How to calculate shot angle and velocity to hit a moving target?

  - by Guen

  I am developing a 2D Android game and I am making an aiming algorithm for AI projectiles to hit enemies either following a path, or free moving. At the moment it just calculates where the target will be after a distance and fires a projectile to meet it at that distance. Of course this means varying the projectile speed to meet the target. Does anyone have any tips for a simple-ish algorithm (optimal-ish) to calculate when the projectile needs to fire and where it needs to aim if it can only travel at a constant velocity? Say the projectile goes twice the speed of the target? The only way I can think of involves searching and seems quite large.

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• Should Business Interfaces be part of the Model layer?

  - by Mik378

  In an oriented-services enterprise application, isn't it an antipattern to mix Service APIs (containing interface that external users depends on) with Model objects (entities, custom exceptions objects etc...) ? According to me, Services should only depends on Model layer but never mixed with it. In fact, my colleague told me that it doesn't make sense to separate it since client need both. (model and service interfaces) But I notice that everytime a client asks for some changes, like adding a new method in some interface (means a new service), Model layer has to be also delivered... Thus, client who has not interested by this "addition" is constrained to be concerned by this update of Model... and in a large enterprise application, this kind of delivery is known to be very risked... What is the best practice ? Separate services(only interfaces so) and model objects or mix it ?

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• Which is the best low/mid level GPU in terms of compatibility for 12.04 and 12.10?

  - by Ghost

  I'm tired of dealing with the disaster that is catalyst on a 4xxx IGP and I want to buy some discrete graphics that support both Unity and alternative environments like GNOME3 and Mate-Cinnamon without getting sluggish. Besides that, 1080p video and some light 3D gaming. Again nothing crazy, I'm not a designer and I wont be using stuff like Blender. One thing I want to make clear is that I want a GPU that is 100% compatible, that means no bugs, no glitches, not having to toggle between propietary and Xorg because it decided to crapout on me. Thanks for your help

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• What is realism?

  - by eversor

  Beyond the obvious something that seams real, realism in games is a hard feature to hit. In some cases, things that are completely impossible in real life are seen as realistic by gamers. For instance, in some FPS you can survive being hit by a fair amount of bullets when in real life one is enough, Newton-defying car drifts, etc. So, in some cases, reductions of life-like actions or consequences implies a bigger sense of realism. The root of this pseudo-philosophical question lies in: I am going to create a engine for battles in an online (browser-based) strategic game. Browser-based means that the battle would not be seen. And i do not know how to approach this realism issue.

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• How can I apply Readme Driven Development to an ongoing project?

  - by Metalcoder

  I'm assigned to a project where the goal is to update an existing software. This software was developed in a totally ad hoc manner, which means that any documentation generated is outdated, confused and just plain useless. I do not want to retroactivelly produce all the missing artifacts, since this would just be a waste of time. The code base is ugly, and really need some serious refactoring, but this is another story. What I want is to apply Readme Driven Development to guide this project. So, basically, I want to write a Readme, which will document every change meaningful at the user level. The problem is, I have no idea about how to structure this document. For me, it's pretty clear that it should have a different layout than the traditional Readme. I really want to document changes, and not the current state of affairs. Any ideas?

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• How can I stay focused and motivated on a project?

  - by RTS

  I'm working on starting my own software development business, but I've noticed that I have major issues getting projects out by their deadlines, and in general getting them out of the "almost-done" stage. I feel my problem is that I like complex programming too much, and I end up rewriting code to make it cleaner/more efficient/less error prone as a means of putting off more "boring" development. I end up with polished applications at the end, but I spend twice as long on the project as I should have. If I ever want my company to succeed, I need to work on staying focused on what actually needs to be done, so the question is: What techniques do you use to keep yourself focused and motivated on a project, in your career?

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• UndoRedo on Nodes (Part 2)

  - by Geertjan

  After the recording of the latest API Design Tip for the upcoming NetBeans Podcast, Jaroslav Tulach helped me with the problem I blogged about yesterday. First he expressed surprise at seeing Undo/Redo work on Nodes, which was never the intention, i.e., that feature was always intended for documents, e.g., the Java editor. However, he then showed me where to find the Properties window in the NetBeans sources, where it is org.netbeans.core.windows.view.ui.NbSheet. It turns out that the Properties window does not have an activated node and hence the Node that implements UndoRedo.Manager is never put in the Lookup. Once we added, on line 303, "this.setActivatedNodes(nodes);", everything worked as expected, i.e., the Undo/Redo actions are now enabled, even when the Properties window is selected: Maybe it means I should file an issue to get that line added to NbSheet?

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• Database Context and Singleton injection with IoC

  - by zaitsman

  All of the below relates to a ASP.NET c# app. I have a Singleton Settings MemoryCache that reads values from database on first access and caches these, then invalidates them using SQL Service Broker message and re-reads as required. For the purposes of standard controllers, i create my Db Context in a request scope. However, this obviously means that i can't use the same context in the Settings Cache class, since that is a singleton and we have a scope collision. At the moment, i ended up with two db contexts - the Controllers get it via IoC container, whereas a Singleton just creates it's own. However, i am not satisfied with this approach (mostly due to the way i feel about two contexts, the cache doesn't set anything on the db hence concurrency is not an issue as much). What is a better way to do it?

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• Free web mangement control panel

  - by Thorn007

  Hey guys I need some help. I will also apologize for not being able to be more specific. I'm looking for a specific web admin panel. that uses a login page via port 2222 or 4444. This is not vanilla forum or any forum. So the only way I know how to make this a legit question is to ask what "free" control panels do you use to manage your web sites. This means files and domains. Why do you use it? Where is it located?

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• Tips to Keep in Mind While Choosing an SEO Company

  If you own a website and want to have the serious profit with the help of that website then you have to find some of the ethical means by which the website can be promoted in the market and more crowds can come on your site. For this you can take advice from the people who are already into this business and can share some ideas with them. Nowadays the most common technique which is being used in the market is the SEO also known as Search Engine Optimization. There are many people on the web world who are familiar with this term but don't have a full idea. For such people there are many Search Engine Optimization Companies which are assisting the people.

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• Very original V&V explanation (Bohm) - I cannot understand its point

  - by user970696

  Hopefully my last thread about V&V as I found the B.Boehm is text which I just do not understand well (likely my technical English is not that good). http://csse.usc.edu/csse/TECHRPTS/1979/usccse79-501/usccse79-501.pdf Basically he says that verification is about checking that products derived from requirments baseline must correspond to it and that deviation leads only to changes in these derived products (design, code). But he says it begins with design and ends with acceptance tests (you can check the V model inside). The thing is, I have accepted ISO12207 in terms of all testing is validation, yet it does not make any sense here. In order to be sure the product complies with requirements (acceptance test) I need to test it. Also it says that validation problems means that requirements are bad and needs to be changed - which does not happen with testing that testers do, who just checks correspondence with requirements.

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