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• What is the state of the art in OOP?

  - by Ollie Saunders

  I used to do a lot of object-oriented programming and found myself reading up a lot on how to do it well. When C++ was the dominant OOP language there was a very different set of best practices than have emerged since. Some of the newer ideas I know of are BDD, internal DSLs, and the importing of ideas from functional programming. My question is: is there any consensus on the best way to develop object-oriented software today in the more modern languages such as C#, Ruby, and Python? And what are those practices? For instance, I rather like the idea of stateless objects but how many are actually using that in practice? Or, is the state of the art to deemphasize the importance of OOP? This might be the case for some Python programmers but would be difficult for Rubyists.

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• What tools should I consider if my strategy is to make a game available to as many platforms as possible?

  - by Kenji Kina

  We're planning on developing a 2D, grid-based puzzle game, and although it's still very early in the planning stages, we'd like to make our decisions well from the beginning. Our strategy will be to make the game available to as many platforms as possible, for example PCs (Windows, Mac and/or Linux), mobile phones (iPhone and/or Android based phones), game consoles (XBLA and/or PSN) PC will have an emphasis, but I believe that's the most flexible platform so that shouldn't be a problem. So, what programming language, game engine, frameworks and all around tools would be best suited for our goal? P.S.: I'm betting a set of tools won't cover ALL of them, and that there will still be some kind of "translating" effort for some platforms, but we'd like to know what the most far reaching are.

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• Recommended book on Actors concurrency model (patterns, pitfalls, etc.)?

  - by Larry OBrien

  The Actors concurrency model is clearly gaining favor. Is there a good book that presents the patterns and pitfalls of the model? I am thinking about something that would discuss, for instance, the problems of consistency and correctness in the context of hundreds or thousands of independent Actors. It would be okay if it were associated with a specific language (erlang, I would imagine, since that seems universally regarded as the proven implementation of Actors), but I am hoping for something more than an introductory chapter or two. (FWIW, I'm actually most interested in Actors as they are implemented in Scala.)

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• "Never to forget information" for programmers [closed]

  - by Milan

  Hi there! I'm new to programming and I would like to make a list of most important pieces of knowledge of programming and CS that would be useful no matter what specific programming language I would use in the future. For instance, if I would make this kind of list for Law studies, there would be stuff like Articles of Constitution etc. Those pieces of information I would put in Anki, and repeat it from time to time. Speaking in terms of CS and programming I mean on the most useful: mathematical theorems algorithms (examples of elegant solutions, comparison of two solutions etc.) pieces of code anything else that is vital (and very handy) to have in mind Do you think that making this kind of knowledge list makes sense?

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• Mobile phone detection (brand, model, browser etc)

  - by SyaZ

  What do you use to detect visitor's mobile phone, down to the model if possible? Currently we maintain our own database but it's really getting behind due to lack of manpower to maintain it, so we decided to give 3rd party solution a try. These are my candidates but I don't have time to really try them all: DeviceAtlas - 1 year personal evaluation, but basic license is affordable. Their database look solid with daily update and user-contributed tests / updates. I am favoring this one at the moment. DetectRight - I was recommended this by a colleague but really can't find much from their site. 20k devices -- really? WURFL - Open source, database collaboratively derived from UAProf. So basically if you're going with UAProf solution, you're better off with WURFL. DetectMoBileBrowsers - This looks like the simplest of all. Too bad it's language dependent (PHP). Please share your experience or suggestions!

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• Is there a Visual Studio style tool/IDE?

  - by Tim

  I have been developing in the windows space with Visual Studio for a while now with work, but I have also been using Ubuntu for a while and am keen to get into some software development for linux. I should also note. I am not looking for .NET and I am aware of mono. I am also familiar with c++ development and some python, so the language isn't so much relevant as the "all in one" aspect. I was interested to know if there is a useful all in one code/debug/design(gui) IDE similar to something like Visual Studio but for linux?

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• Initialized variables vs named constants

  - by Mike

  I'm working on a fundamental programming class in college and our textbook is "programming logic and design" by joyce farrell(spelling?) Anyhow, I'm struggling conceptually when it comes to initialized variables and named constants. Our class is focusing on pseudo-code for the time being and not one particular language so let me illustrate what I'm talking about. Let's say I am declaring a variable named "myVar" and the data type is numeric: num myVar now I want to initialize it (I don't understand this concept) starting with the number 5 num myVar = 5 how is that any different than creating a named constant?

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• Mail Scanning System

  - by Mr D

  In the same way gmail can generate ads based on email content, I am looking for a way to develop a system which can: Allow users to connect their email address to our site It then would continously monitor all incomming emails From the incomming emails there would be a critera(e.g. a certain address or subject) if any of the emails matched the critea it would would be saved to a database Then once a new email had been found the users would receive an email notification will tells them to log back into the site to see it. My questions are: Would this be possible? What would be a good language to use(generally I like php, python and java) Are there any frameworks which would help do this? How would I connect the users email account to allow access to their emails(do I need a mail server?) Any advice? Thank you! If you need more information please let me know.

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• Why does a computer science degree matter to a professional programmer?

  - by P.Brian.Mackey

  I have a degree in computer science. It has been great for opening doors, getting a job. As far as helping me in the professional field of C# .NET programming (the most popular platform and language in the area I work if not the entire united states on hands down the most popular OS in the world) its hardly useful. Why do you think it helps you as a programmer in your professional career (outside spouting off to prims algorithm to impress some interviewer)? In today's world adaptation, a quick mind, strong communication, OO and fundamental design skills enable a developer to write software that a customer will accept. These skills are only skimmed over in the cs program. In my mind, reading a 500 page C# book by Wrox offers far more useable a skillset than 4 years of the comp sci math blaster courses. Many disagree. So, why does a computer science degree matter?

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• ASP.NET AJAX Release History : Q1 2010 SP2 (version 2010.1.519)

  Common for all controls What's Fixed Fixed: Problem with RegisterWithScriptManager=false (MVC) and browsers without gzip support Fixed: $telerik.getLocation implementation, in case the element is a child of an element with position:fixed Visual Studio Extensions What's New Improved: Visual Studio 2010 support for upgrade notifications What's Fixed Fixed: Code language selection in WebSite does not work. RadAjax What's Fixed Fixed: RadAjax controls break on AJAX callback with ToolkitScriptManager...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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• Best book for developer who needs to learn software fundamentals

  - by tharrison

  I have recently inherited a team of developers, none of whom really have any programming experience. Some are really bright, and are learning on their own. I am looking for one or two books that are practical but show the core practices of professional development: Structure, OO, naming, DRY, why elegance matters, etc. When I was learning, I loved Code Complete, and Programming Pearls, but they are dated now. Any recommendations for good books that could be used in tandem with a language specific book to help understand? Thanks in advance!

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• Can i create a SDL_Surface as i do with Allegro?

  - by Petris Rodrigo Fernandes

  First of all, I'm sorry about my english (Isn't my native language) Using allegro I can create a Bitmap to draw just doing: BITMAP* bmp = NULL; bmp = create_bitmap(width,height); // I don't remember exactly the parameters I'm using SDL now, and i want create a SDL_Surface to draw the game level (that is static) creating a SDL_Surface, drawing the tiles on it, then i just blit this surface to the screen instead of keep drawing the tiles directly on screen (i believe this will require more processing); There a way to create a blank SDL_Surface as i did with Allegro just do draw before blit it?

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• Investigating a big C++ project from its source code [closed]

  - by user827992

  Possible Duplicate: What is the best method to start understanding BIG project source code? I have a project that I would like to dissect to learn something new from it. This project is about 200 megabytes. For me, it is just impossible to open every cpp and hpp file and read each and every one. I also don't know what is the best approach in this case. Many people on the internet are looking for an UML tool to generate some kind of graph. I think that UML works well when you are starting a project and you want to express the business logic of your classes and methods. In my opinion UML is totally useless when studying a project only from its source code. Also UML is an OO language, in a large sized C++ project I find a lot of stuff that is not an object and can express some other kind of paradigm. Can you name a tool or a class of software that can help with this?

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• Packages don't show up after adding ppa

  - by user32993

  I added ppa:ubuntu-mozilla-daily/ppa/firefox-aurora/ubuntu oneiric and ppa:banshee-team/ppa/ubuntu oneiric to my software sources, then did apt-get update. However, after selecting their specific sources from the menu in Software Center, the only packages available are language packs and extensions for Banshee and firefox-aurora. I had already uninstalled Banshee and Firefox. If I try and install Banshee/Aurora with sudo apt-get it will install the old version. Searching for Banshee/Aurora in Software Center only shows the old version. I'm guessing the packages in the PPAs conflict with the packages in the main sources. How do I install the newer versions?

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• How to set-up a simple subversion workflow

  - by Milen Bilyanov

  I am trying to set-up a simple SVN workflow at home. I am new to subversion (and programming) so I have been reading the official PDF documentations but still not sure about how to set-up my repository. I am working mainly with python, bash and rsl (Renderman Shading Language) So I already have a /dev structure on my disk as this: http://imageshack.us/f/708/devstructure.png/ And I have a /site structure that links to my /dev folder: http://imageshack.us/f/651/sitestructure.png/ So obviously starting to use SVN will change this approach that I already have in place. The question is when I am setting-up my SVN repository for the work I do in my /dev folder: Will I set-up a separate repository for each different programming platform? and Where exactly I should be placing my repository? Thanks.

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• Why is there a "new" in Go?

  - by dystroy

  I'm still puzzled as why we have new in Go. When you want to instantiate a struct, you do t := Thing{} and, obviously, you can get a pointer to a new instance by doing t := &Thing{} But there's also this possibility : t := new(Thing) This last one seems a little alien to me. &Thing{} is as clear and concise as new(Thing) and it uses only constructs you often use elsewhere. It's also more extensible as you might change it to &Thing{3} or &Thing{Feets:7}. In my opinion, having a supplementary keyword is costly, it makes the language more complex and adds to what you must know. And it might mask to newcomers what's behind instantiating a struct. It also makes one more reserved word. So what's the reasoning behind new ? Is it something useful ? Should we use it ?

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• Sharing Authentication Across Subdomains using cookies

  - by Jordan Reiter

  I know that in general cookies themselves are not considered robust enough to store authentication information. What I am wondering is if there is an existing design pattern or framework for sharing authentication across subdomains without having to use something more complex like OpenID. Ideally, the process would be that the user visits abc.example.org, logs in, and continues on to xyz.example.org where they are automatically recognized (ideally, the reverse should also be possible -- a login via xyz means automatic login at abc). The snag is that abc.example.org and xyz.example.org are both on different servers and different web application frameworks, although they can both use a shared database. The web application platforms include PHP, ColdFusion, and Python (Django), although I'm also interested in this from a more general perspective (i.e. language agnostic).

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• How to link subprograms to a main program's game loop?

  - by Jim

  I recently discovered Crobot which is (briefly) a game where each player codes a virtual robot in a pseudo-C language. Each robot is then put in an arena where it fights against other robots. A robots' source code has this shape : /* Beginning file robot.r */ main() { while (1) { /* Do whatever you want */ ... move(); ... fire(); } } /* End file robot.r */ You can see that : The code is totally independent from any library/include Some predefined functions are available (move, fire, etc…) The program has its own game loop, and consequently is not called every frame My question is roughly : how does it work ? It seems that each robot's code is compiled by the main program and then used in a way I cannot understand. I thought it could yields a thread for each robot, but I have not any proof of this and it seems a bit complicated to achieve it. Any idea how it could work, someone ?

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• What are the typical applications of Lisp macros?

  - by Giorgio

  I am trying to learn some LISP and I have read a lot about the importance of LISP macros so I would like to get some working experience with them. Can you suggest a practical application area that would allow me to use macros to solve a real-world problem, and to understand the usefulness of this programming construct? NOTE This is not a generic what project should I do next question. I am interested to understand which kinds of problems are typically solved by means of LISP macros. E.g., are they good for implementing abstract data types? Why was this construct added to the language? What kinds of problems does it solve that cannot be solved by means of simple functions?

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• ASP.NET AJAX Release History : Q1 2010 SP2 (version 2010.1.519)

  Common for all controls What's Fixed Fixed: Problem with RegisterWithScriptManager=false (MVC) and browsers without gzip support Fixed: $telerik.getLocation implementation, in case the element is a child of an element with position:fixed Visual Studio Extensions What's New Improved: Visual Studio 2010 support for upgrade notifications What's Fixed Fixed: Code language selection in WebSite does not work. RadAjax What's Fixed Fixed: RadAjax controls break on AJAX callback with ToolkitScriptManager...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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• locale: Reset lost settings

  - by Adam Matan

  Due to some strange reason, I've lost some of my locale settings. I've managed to restore most of them using sudo dpkg-reconfigure locales: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LANG = "en_US.UTF-8" are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory So I'm stuck with one missing value: $ locale locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory LANG=en_US.UTF-8 LC_CTYPE="en_US.UTF-8" LC_NUMERIC="en_US.UTF-8" LC_TIME="en_US.UTF-8" LC_COLLATE="en_US.UTF-8" LC_MONETARY="en_US.UTF-8" LC_MESSAGES="en_US.UTF-8" LC_PAPER="en_US.UTF-8" LC_NAME="en_US.UTF-8" LC_ADDRESS="en_US.UTF-8" LC_TELEPHONE="en_US.UTF-8" LC_MEASUREMENT="en_US.UTF-8" LC_IDENTIFICATION="en_US.UTF-8" LC_ALL= Any idea how to restore them all? Thanks, Adam

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• Resources on learning to program in machine code?

  - by AceofSpades

  I'm a student, fresh into programming and loving it, from Java to C++ and down to C. I moved backwards to the barebones and thought to go further down to Assembly. But, to my surprise, a lot of people said it's not as fast as C and there is no use. They suggested learning either how to program a kernel or writing a C compiler. My dream is to learn to program in binary (machine code) or maybe program bare metal (program micro-controller physically) or write bios or boot loaders or something of that nature. The only possible thing I heard after so much research is that a hex editor is the closest thing to machine language I could find in this age and era. Are there other things I'm unaware of? Are there any resources to learn to program in machine code? Preferably on a 8-bit micro-controller/microprocessor. This question is similar to mine, but I'm interested in practical learning first and then understanding the theory.

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• Translating to Bash Command

  - by user3424684

  So for a project for school I had to install the DPJ extension to the Java language. I downloaded and unpacked a tarball containing the files, and then was told to run the following: setenv DPJ_ROOT ${Home}/dpjbin setenv PATH ${PATH}:${DPJ_ROOT}/Implementation/bin How do I do these commands using bash? I know I have to open up the /etc/profile file and add 2 lines (or for the PATH one do I just append something to the top line of the file after a colon?). Any help in how to do this would be appreciated. If it helps I run Ubuntu 14.04 on Virtualbox (and have little to no experience)

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• Over a million COBOL porgrammers in the world?

  - by Lucas McCoy

  I think I heard on a previous StackOverflow podcast that COBOL was used as the programming language for traffic lights (or something like that), so this got me interested. I did a quick Google search and found this little article: Today, Cobol is everywhere, yet largely unheard of by millions of people who interact with it daily when using the ATM, stopping at traffic lights or buying a product online. The statistics on Cobol attest to its huge influence on the business world: There are over 220 billion lines of Cobol in existence, a figure which equates to about 80 per cent of the world’s actively used code. There over a million Cobol programmers in the world. There are 200 times as many Cobol transactions that take place each day than Google searches. I didn't really trust the source seeing as how it's on some random PHPBB forum. So how accurate are these figures? Are there really 220 billion lines of COBOL? I assume a few people/companies still use COBOL, but how many?

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• Which languages are more conducive to telecommuting, and also less concerned with pairing?

  - by Dirk

  I don't know that it may even make a difference, and I reckon if it did the differences would be cultural rather than technical, but if one were going to set out today (2011) to learn a language, and specifically wanted to telecommute (so they could live in two different places during the year), are there any languages whose culture looks more favorably upon telecommuting than other languages / cultures? For example, I get the impression (and I am probably completely wrong) that in the Ruby community, you are more likely to be expected to be on-site and doing pair programming (though I suppose you can do pairing remotely too). As a corollary question, are there languages / communities where pair programming is less important, for people who wanted to program in part because they aren't social butterflies?

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