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  • When to use C over C++, and C++ over C?

    - by Dark Templar
    I've been introduced to Computer Science for a little over a year now, and from my experience it seems that C and C++ are both considered one of the "ultrafast" languages out there, whereas others such as Python and such scripting languages are usually deemed somewhat slower. But I've also seen many cases where a software project or even a small one would interleave files where a certain number n of those files would be written in C, and a certain number m of those files would be written in C++. (I also noticed that C++ files almost always have corresponding headers, while C files not so much). But my main point of inquiry is to get a general sense of intuition on when it is appropriate to use C over C++, and when it is better to use C++ over C. Other than the facts that (1) C++ is object-oriented whereas C is not, and (2) the syntaxes are very similar, and C++ was intentionally created to resemble C in many ways, I am not sure what their differences are. It seems to me that they are (almost) perfectly interchangeable in many domains. So it would be appreciated if someone could clear up the situation! Thanks

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  • Can I copy large files faster without using the file cache?

    - by Veazer
    After adding the preload package, my applications seem to speed up but if I copy a large file, the file cache grows by more than double the size of the file. By transferring a single 3-4 GB virtualbox image or video file to an external drive, this huge cache seems to remove all the preloaded applications from memory, leading to increased load times and general performance drops. Is there a way to copy large, multi-gigabyte files without caching them (i.e. bypassing the file cache)? Or a way to whitelist or blacklist specific folders from being cached?

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  • Are Web Safe Colors Still Relevant?

    - by VxJasonxV
    I still remember one of my high school teachers lecturing us about the "web safe colors". A set of 216-256 colors that you should confine your designs to use, and nothing else besides them. Last I knew, Photoshop still has the "web safe" yield icon[1] on it's color picker. Are web safe colors still a concern? Outside of the obvious application (accessibility, legacy software versions, etc.), how much consideration should I give to limiting my color choice for my general audience? [1] Or was it the cube? I never remember.

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  • Missed question in technical phone interview and the follow up letter

    - by Jacob
    I may have just bombed a C++ technical phone interview. The interviewer asked mostly about data structures and I was able to go into detail about each of the data structures he asked about. Score one for me I'm thinking. Wrong. Then he asks to join me on a collaboration website where he can see what I am typing. This was the same process as interview #1 which went well, not perfect, but well. So the question was: How do you reverse a linked list? he gave a function prototype similar to Node *reverse(Node *head) I struggled with this for about 10-15 minutes until the hour was up. I was able to get the general idea across but was not able to reverse the link list. My question is that after remembering the answer post interview do I mention this in the thank you letter, if I even should write one?

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  • Using allocators for different systems

    - by chadb
    I am going over the memory architecture for my game and even though I know my memory budgets may not be final, I at the point where I can start using them in a general sense. I know that I will need several allocators (for systems such as audio, rendering, etc) but I am unsure of how they will be accessed. I do not use singletons, so I can't just have something such as AudioManager::GetInstance().get_allocator(). Instead, I need to find a different method of usage but I am not sure of how. How can I store and call my allocators needed for several different systems over engine in an efficient manner?

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  • Data structures for storing finger/stylus movements in drawing application?

    - by mattja?øb
    I have a general question about creating a drawing application, the language could be C++ or ObjectiveC with OpenGL. I would like to hear what are the best methods and practices for storing strokes data. Think of the many iPad apps that allow you to draw with your finger (or a stylus) or any other similar function on a desktop app. To summarize, the data structure must: be highly responsive to the movement store precise values (close in space / time) usable for rendering the strokes with complex textures (textures based on the dynamic of the stroke etc) exportable to a text file for saving/loading

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  • CommonFilter 0.3D now released on CodePlex.

    CommonFilter is a subset of the CommonData project, containing just the functions and unit tests for filtering user input. The functions include filters for: Input of upper case and lower case alpha Input of numeric fields Input of text containing HTML markup to check that it only contains permitted markup. The general functions are available both as a form that silently drops non-permitted characters or in a try-parse format....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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  • CommonFilter 0.3D now released on CodePlex.

    CommonFilter is a subset of the CommonData project, containing just the functions and unit tests for filtering user input. The functions include filters for: Input of upper case and lower case alpha Input of numeric fields Input of text containing HTML markup to check that it only contains permitted markup. The general functions are available both as a form that silently drops non-permitted characters or in a try-parse format....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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  • Character coding / programming

    - by Jery
    Lately I tryed a few times to create characters for some games, but at some certain point (especially when collision detection came in) everything became messy and the interaction between chars, the world and certain items had a lot of bugs. So here is my question, how do you ussualy keep track of actions that your character is allowed to do, or more in general do you have some links / advices how to set up a char efficiantly? I´m working on a char right now, who should at least be able to run, jump, pick items up and use different fighting animations. Most ideas I came up with until now use some kind of action.priority / action.duration system to determain whats possible and what not, or a "action-manager" which defines for every action what is possible from that action on but it all doesnt work that well together.

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  • How to refuse to give an access to passwords to a customer without being unprofessional or rude?

    - by MainMa
    Let's say you're creating a website for a customer. This website has its own registration (either combined with OpenID or not). The customer asks you to be able to see the passwords the users are choosing, given that the users will probably be using the same password on every website. In general, I say: either that it is impossible to retrieve the passwords, since they are not stored in plain text, but hashed, or that I have no right to do that or that administrators must not be able to see the passwords of users, without giving any additional details. The first one is false: even if the passwords are hashed, it is still possible to catch and store them on each logon (for example doing a strange sort of audit which will remember not only which user succeeded or failed to logon, but also with which password). The second one is rude. How to refuse this request, without being either unprofessional or rude?

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  • How to start to gain experience of managing a project

    - by Tim
    There are some job requirements of project management experience for a programmer, such as: the candidate has to have some experience managing a project, not necessarily with subordinates, but rather having worked on a project all the way from design down to test. I was wondering what "subordinates" mean here? if there are some books, webpages or elsewhere with both general guideline and simple practical sample projects to help one get some basics about the whole process of a project. I am particularly interested in projects for both Linux and Windows, in C, C++, Python, Java. I am considering to start by playing on my own, not eager to find a company yet. My major was not CS, so I might lack the basics.

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  • Collision: Vector class (java)

    - by user8363
    When handling collision detection / response and you need a Vector class, do you need to create that class yourself or is there a java class you can use? A vector class should have methods like: subtract(Vector v), normalize(), dotProduct(Vector v), ... At the moment it seems logical to use classes like java.awt.Rectangle and java.awt.Polygon to calculate collisions. Would I be right to use these classes for this purpose? My question is not about how to implement collision detection, I know how that works. However I'm wondering what would be a correct and clean way to implement it in java since I'm fairly new to the language and to application development in general.

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  • From Java to Javascript? [duplicate]

    - by theGreenCabbage
    This question already has an answer here: Are there any OO-principles that are practically applicable for Javascript? 2 answers I am primarily a Java programmer. Because of its OO principles and the general paradigm of Java programming, like wrapping things in static variables, and having things return specific types, heavily aids me in "visualizing" a program. Instead of thinking of a big program, I can, instead, focus on smaller organized parts of my eventual program, and add functionality and build up from there. Thus, I have trouble programming in other languages. Or at least, I have not been able to program in the same ability as I do in Java compared to other languages. I know Javascript has OO principles, so I'd like to learn this language in a OO-based like I would program with Java. Is this possible?

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  • Natal ne servira pas qu'à jouer, le système de reconnaissance de mouvements de Microsoft aura des ap

    Mise à jour du 26/04/10 Le projet Natal ne servira pas qu'à jouer Le système de reconnaissance de mouvements de Microsoft pourrait avoir des applications plus "intrusives", voire publicitaires Le projet Natal ne servira pas qu'à jouer. C'est ce que vient de laisser entendre Marc Whitten, general manager de la Xbox 360. La technologie de reconnaissance de mouvements développée par Microsoft pourraient également avoir des applications plus... intrusives. « Imaginez un événement sportif. Natal pourrait savoir pour quelle équipe vous êtes, parce qu'il voit votre maillot ou qu'il repèrera quand [...] vous...

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  • Creating Objects

    - by user1424667
    I have a general coding standard question. Is it bad practice to initialize and create an object in multiple methods depending on the outcome of a users choice. So for example if the user quits a poker game, create the poker hand with the cards the user has received, even if < 5, and if the user played till the end create object to show completed hand to show outcome of the game. The key is that the object will only be created once in actuality, there are just different paths and parameters is will receive depending on if the user folded, or played on to the showdown.

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  • Can manager classes be a sign of bad architecture?

    - by Paul
    Lately I've begun to think that having lots of manager classes in your design is a bad thing. The idea hasn't matured enough for me to make a compelling argument, but here's a few general points: I found it's a lot harder for me to understand systems that rely heavily on "managers". This is because, in addition to the actual program components, you also have to understand how and why the manager is used. Managers, a lot of the time, seem to be used to alleviate a problem with the design, like when the programmer couldn't find a way to make the program Just WorkTM and had to rely on manager classes to make everything operate correctly. Of course, mangers can be good. An obvious example is an EventManager, one of my all time favorite constructs. :P My point is that managers seem to be overused a lot of the time, and for no good reason other than mask a problem with the program architecture. Are manager classes really a sign of bad architecture?

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  • Should Git be used for documentation and project management? Should the code be in a separate repository?

    - by EmpireJones
    I'm starting up a Git repository for a group project. Does it make sense to store documents in the same Git repository as code - it seems like this conflicts with the nature of the git revision flow. Here is a summary of my question(s): Is the Git revisioning style going to be confusing if both code and documents are checked into the same repository? Experiences with this? Is Git a good fit for documentation revision control? I am NOT asking if a Revision Control System in general should or shouldn't be used for documentation - it should. Thanks for the feedback so far!

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  • record and replay directinput events

    - by cloudraven
    I am trying to build a record and replay system for a couple of games. I was wondering if I can make a general replay engine using directinput rather than doing an specific implementation for each game. Recording DirectInput events doesn't seem to be that much of a problem, but I don't know if there is a way to play them back. My question is, is there a way to feed DirectInput events from a log and make DirectInput believe that they came from mouse/joystick/keyboard? I assume it is unlikely, but if there is a way I would be interested in learning about it.

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  • What is the benefit of the "download will begin shortly" page?

    - by Fammy
    I've noticed many websites that host files for downloads have an interstitial page between the download link/button and the actual start of the download. Terminology on the page may include "Your download will begin shortly. If it does not, try this direct link". What is the purpose of this page? It seems to draw away from the general experience of downloading a file. Is this beneficial for bookmarking? Less experienced users? Analytics?

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  • Collision representation in game overworlds

    - by Akroy
    I'm implementing a 2D overworld where one can walk through an area that is not tile based. I was wondering the best way to implement collisions. In the past when I've done similar things, I've used one image (or set of images) to show an elaborately drawn world and then a second binary image that does nothing but differentiate "wall" and "not wall". Then, I'd use the first for all drawing to the screen, but the second for collision detection. Having another image of the same size to represent collisions seems like lots of overhead. Is there a better way to handle this? (I'm currently using C++ with SDL, although I'm more interested in general concepts)

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  • Why is not there a python compiler to native machine's code?

    - by user2986898
    As I understand, the cause of the speed difference between compiled languages and python is, that the first compiles code all way to the native machine's code, whereas python compiles to python bytecode, to be interpreted by the PVM. I see that this way python codes can be used on multiple operation system (at least in most cases), however I do not understand, why is not there an additional (and optional) compiler for python, which compiles the same way as traditional compilers. This would leave to the programmer to chose, which is more important to them; multiplatform executability or performance on native machine. In general; why are not there any languages which could be behave both as compiled and interpreted?

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  • Squibbly Update: Multiple Document Support

    - by Geertjan
    An update on Squibbly, the recently announced free and open source integration framework for LibreOffice! Now multiple documents can be opened at the same time, either from "File | Open File" or from the File Browser (i.e., the rebranded Favorites window). Click to enlarge the image below to get a fuller perspective on Squibbly: Take note of the tabs at the bottom of the editor-area in the screenshot above, and especially when you click the image to enlarge it. Multiple tabs are available at the same time, each representing a different open document. Click a different tab and its document is activated and brought to the front of the application. That means multiple LibreOffice applications can be used simultaneously, each could be undocked from the frame of the application, and the user can work with multiple documents, from multiple LibreOffice applications, all at the same time. Info from this forum entry were useful in getting to the above solution: http://www.oooforum.org/forum/viewtopic.phtml?t=41955 Still several focus-related problems to solve for the application to be ready for general usage.

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  • Building a website, wondering how to add news to it? Details inside. [closed]

    - by Robolisk
    On the home page of my website, I'd like to add a "news" kind section, where I can add blogs and such. Now from my understanding if this was all done in hard coding I'd have to go into the code just to add stuff to it. I've looked at things like drupal and I get how those work, but I how would I be able to add this to my site? The same kind of concept? Also, one more thing, what does inc operating php into a website offer? like better looks or general preformence? I don't understand this. Excuse my grammar/spelling. (: And thank you for taking the time to read this.

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  • An Annotated Line of Business Application

    The Silverlight HyperVideo Player  has met with strong support and interest. This mini-tutorial is the first in a series that will walk through the design and delivery of this project. This series will pretend that the design existed before we began coding, and will not take you through its evolution over the months between December 2009 and March 2010. In short, this series is a drop-line exercise highlighting how the program works with a focus on teasing out general principles of creating...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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  • Want to use h264 in my commercial program. What steps should i take?

    - by Jason123
    Want to use h264 in my commercial program. What steps should I take? Here is what I see that needs to be done. I need to buy a license from VideoLan (x264licensing.com) to use the library to encode video into h264 format and I need to buy a license from the MpegLAGroup to use the h264 video encoding in general in my commercial product. Am I right in thinking that? How much do these cost? I don't see selling much since my target is very niche (video game screen capturing).

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