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• immutable strings vs std::string

  - by Caspin

  I've recent been reading about immutable strings, here and here as well some stuff about why D chose immutable strings. There seem to be many advantages. trivially thread safe more secure more memory efficient in most use cases. cheap substrings (tokenizing and slicing) Not to mention most new languages have immutable strings, D2.0, Java, C#, Python, Ruby, etc. Would C++ benefit from immutable strings? Is it possible to implement an immutable string class in c++ (or c++0x) that would have all of these advantages?

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• Machine learning in OCaml or Haskell?

  - by griffin

  I'm hoping to use either Haskell or OCaml on a new project because R is too slow. I need to be able to use support vectory machines, ideally separating out each execution to run in parallel. I want to use a functional language and I have the feeling that these two are the best so far as performance and elegance are concerned (I like Clojure, but it wasn't as fast in a short test). I am leaning towards OCaml because there appears to be more support for integration with other languages so it could be a better fit in the long run (e.g. OCaml-R). Does anyone know of a good tutorial for this kind of analysis, or a code example, in either Haskell or OCaml?

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• How to choose the right web application framework?

  - by thenextwebguy

  http://en.wikipedia.org/wiki/Comparison_of_web_application_frameworks Since we are ambitiously aiming to be big, scalability is important, and so are globalization features. Since we are starting out without funding, price/performance and cost of licences/hardware is important. We definitely want to bring AJAX well present in the web interface. But apart from these, there's no further criteria I can come up with. I'm most experienced with C#/ASP.net, PHP and Java, in that order, but don't turn down other languages (Ruby, Python, Scala, etc.). How can we determine from the jungle of frameworks the one that suits best our goal? What other questions should we be asking ourselves? Reference material: articles, book recommendations, websites, etc.?

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• Can we represent bit fields in JSON/BSON?

  - by zubair

  We have a dozen simulators talking to each other on UDP. The interface definition is managed in a database. The simulators are written using different languages; mostly C++, some in Java and C#. Currently, when systems engineer makes changes in the interface definition database, simulator developers manually update the communication data structures in their code. The data is mostly 2-5 bytes with bit fields for each signal. What I want to do is to generate one file from interface definition database describing byte and bit field definitions and let each developer add it to his simulator code with minimal fuss. I looked at JSON/BSON but couldn't find a way to represent bit fields in it. Thanks Zubair

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• How to optimize MATLAB loops?

  - by striglia

  I have been working lately on a number of iterative algorithms in MATLAB, and been getting hit hard by MATLAB's performance (or lack thereof) when it comes to loops. I'm aware of the benefit of vectorizing code when possible, but are there any tools for optimization when you need the loop for your algorithm? I am aware of the MEX-file option to write small subroutines in C/C++, although given my algorithms, this can be a very painful option given the data structures required. I mainly use MATLAB for the simplicity and speed of prototyping, so a syntactically complex, statically typed language is not ideal for my situation. Are there any other suggestions? Even other languages (python?) which have relatively painless matrix tools are an option.

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• Simplified iphone In-app store implementation for built-in product features

  - by Joey

  This question is for those familiar with implementing the iphone in-app store functionality. The app I'm building has only built-in features that are unlocked when features are purchased. Further, any modifications or additions to store items will require an app update. Also, it is only in English so has no localized languages for the items. If we take those assumptions, is it feasible to skip the step of retrieving the product info with SKProductsRequest and simply use hardcoded data within the app? While I may want to extend my app to greater complexity in the future, I'd like to know if this step to keep it simple would introduce some serious issues. One issue might be, for instance, if we have to expect a few of the items to occasionally be unavailable due to issues on Apple's side and simply trying to purchase it and letting it fail would not be a permissible or workable option in that case (especially if it is uncommon). Thanks.

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• Getting started with writing a desktop app that talks to an iPhone

  - by Anna Lear

  I'm thinking of writing an app to selectively transfer photos/music to and from my iPhone, mostly for fun and personal convenience. However, I'm stuck at the very beginning -- where do I look to find information on how to do this? Pretty much every link I see talks about developing applications that run on the iPhone, but nothing about desktop app for interfacing with an iPhone. I'm on Windows (no access to a Mac, but I'll take suggestions for that for when I eventually acquire one), and I'm most familiar with C#, but other languages are definitely an option. Can anybody offer me a few pointers on getting started? Thanks.

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• Web Application Translation, methods and tools

  - by CiscoIPPhone

  I've developed a web application. It needs to be translated to languages other than English in the future, and ideally the translators shouldn't need to know HTML/JS/C++ to provide the translation. The server side of the web application is written in C++ and the majority of the localised text is in the HTML files. My question is: What approaches are there to translating web applications? - Are there any existing tools that would enable a translator who doesn't understand HTML to translate a site? Should I write an application that extracts the localised text from a html file and can re-substitute translated text? Do you just provide the html file to your translators to be localised? I'm aware the question isn't strictly programming related but the solution may involve programming and it may require some software engineering.

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• Programming language for web

  - by cable729

  I haven't programmed in a while, and have kind of lost interest, but I want to get back, and I've enjoyed C# the most, a lot more than objective-c and visual basic. So I want to make some games that me and my friends will be able to play next school year. So basically something you can play on the web. What programming languages deploy to the web? If c# is possible, and a mac with safari/firefox would be able to use it (I can't install plugins, and I don't want to get in trouble for making myself admin again) Flash, Java, etc. If java does, I'd like that most since it's most like c#. Then what libraries/engines would I use? I want to do 2d. And then what IDE would I use? Thanks in advance!

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• Ant ignores attempt to override the LANG environment variable

  - by Steen

  We need to test a java build with the languages set to different values. I can manually (i.e. via export LANG=en_DK.UTF-8 and export LANG=en_DK) test that the unit tests run with the ant build script behaves differently, but I need to set the environment variable from ant. I have tried setting it using these methods (with the shell $LANG set to en_DK.UTF-8): using -D on the command line: ant -DLANG=en_DK using a build.properties file with the line LANG=en_DK in it using the following statements in the build.xml file (sorry for the formatting, I can't get SO to display it otherwise): : <property environment="ANTENV"/> <property name="ANTENV.LANG" value="en_DK"/> Using any of the three possibilities, and when run with -debug, ant reports that: Override ignored for property "LANG" What can I do to set the LANG environment variable from within ant?

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• Good Front end for PostgreSQL on Windows or Mac

  - by anjanb

  I'm considering using postgreSQL 8.4x db on windows/Mac for development and linux for production. wondering what front-end tools are out there that are comparable to Toad (for Oracle) ? PostgreSQL comes with PgAdminIII. It's OK but I feel there might be something better than that. I prefer free or open source but if something is NOT too expensive(we are a NON-PROFIT), would not mind evaluating. minimal tools that I want 1) connection manager 2) Nice SQL Editor 3) Explain Plan 4) help with SQL embedding into various languages. 5) E-R diagrams would be good but this would not be a killer feature for me. Anything work for you guys ? Will be using java 6 to build the application(s) if that is relevant at all. Thank you,

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• is there a such thing as a randomly accessible pseudo-random number generator? (preferably open-sour

  - by lucid

  first off, is there a such thing as a random access random number generator, where you could not only sequentially generate random numbers as we're all used to, assuming rand100() always generates a value from 0-100: for (int i=0;i<5;i++) print rand100() output: 14 75 36 22 67 but also randomly access any random value like: rand100(0) would output 14 as long as you didn't change the seed rand100(3) would always output 22 rand100(4) would always output 67 and so on... I've actually found an open-source generator algorithm that does this, but you cannot change the seed. I know that pseudorandomness is a complex field; I wouldn't know how to alter it to add that functionality. Is there a seedable random access random number generator, preferably open source? or is there a better term for this I can google for more information? if not, part 2 of my question would be, is there any reliably random open source conventional seedable pseudorandom number generator so I could port it to multiple platforms/languages while retaining a consistent sequence of values for each platform for any given seed?

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• Longest keyword chain?

  - by pg-robban

  As I was typing some constants in Java I noticed I had used 4 keywords in a row, which Eclipse highlighted for me: public static final int. I then took a break from my regular coding and asked myself (and google with no relevant results) what the longest chain of keywords I can use and still have valid code. After a while, the best I could come up with was this method definition: public synchronized static final strictfp int a() { ... which is 6 keywords in Java. Is it possible to go 7, or even higher? What about other languages?

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• What programs should I write to truly experience this fancy new language ?

  - by privatehuff

  Tried Scheme at one point, just built up half of a "math" and "string" library before getting bored... Similar experience with Java, but stopped early because I was appalled at the lack of operator overloading. When you try out a new language, is there a program/game/function/exercise/problem that you use to get into the hot meaty center and really EXPERIENCE the language? I've been wanted to try Python, Ruby, some lisps, etc but can't seem to find any meaningful work to do with them, or any reason to use them for anything over languages I already know. Sorry this is a discussion, but you are EXACTLY the people I want to get input from on this

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• What web server should I use if I want to run Java code behind it?

  - by Boaz

  At the moment, I have lot's of Java which does all kind of nifty stuff and I'm happy with it. The code is command line driven which have been great so far, but I recently decided I want to make the functionality available through web-services. Since my is complex and I'm happy with the way it's written , I don't want go through the pain of porting it to other languages. So I set out on a google journey to find out what web servers exist (on a Linux machine, though it's interesting to hear the answer without that limitation). From what I could find, it seems that there are two viable options: Apache Tomcat and Sun Java Server. What are the reason to choose one on top of the other? what are the strength of each and what are the weaknesses? Or, perhaps, there is a third one which is much easier, flexible and less cumbersome. Anyone?

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• Posting a jaiku using xcode

  - by frameworkguy

  NSMutableURLRequest *jaikuRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://api.jaiku.com/json"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; [jaikuRequest setHTTPMethod:@"POST"]; NSString *jbody= [NSString stringWithFormat:@"method=presence.send&user=XXusernameXX&personal_key=XXpersonalkeyXX&message=%@", encodedMsg]; [jaikuRequest setHTTPBody:[[NSString stringWithFormat:jbody] dataUsingEncoding:NSASCIIStringEncoding]]; I wrote the above code snippet to be able to post a jaiku on jaiku.com. I've come across similar samples in other languages for posting a jaiku. However i get the following response in the console: {"status": "error", "message": "Invalid API user", "code": 0} what could be the error or if im wrong, what is the correct approach to posting a jaiku using xcode?

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• If you have an application localized in pt-br and pt-pt, what language you should choose if the syst

  - by Sorin Sbarnea

  If you have an application localized in pt-br and pt-pt, what language you should choose if the system is reporting only pt code (generic Portuguese)? This question is independent of the nature of the application, desktop, mobile or browser based. Let's assume you are not able to get region information from another source and you have to choose one language as the default one. The question does apply as well for more case including: * pt-pt and pt-br * en-us and en-gb * fr-fr and fr-CA * zh-cn, zh-tw, .... - in fact in this case I know that zh can be used as predominant language for Simplified Chinese where full code is zh-hans. For zh-tw, zh-hant-tw, zh-hk, zh-mo the proper code (canonical) should be zh-hant. In fact the question can be extended to: How to I determine the predominant languages for a specified meta-language? I need a solution that will include at least Portuguese, English and French.

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• Disabling single line copy in Visual Studio

  - by erlando

  Is there anyway to disable the rather annoying feature that Visual Studio (2008 in my case) has of copying the line (with text on it) the cursor is on when CTRL-C is pressed and no selection is made? I know of the option to disable copying blank lines. But this is driving me crazy as well. ETA: I'm not looking to customize the keyboard shortcut. ETA-II: I am NOT looking for "Tools-Options-Text Editor-All Languages-Apply cut or copy to blank lines...".

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• Use only some parts of Django?

  - by Hanno Fietz

  I like Django, but for a particular application I would like to use only parts of it, but I'm not familiar enough with how Django works on the inside, so maybe someone can point me into the right direction as to what I have to check out. Specifically, I want to use: The models and database abstraction The caching API, although I want to avoid database lookups by caching, not HTML generation, and since the caching framework in Django is intended for the latter, I'm not sure yet whether that's really appropriate. I would not use: Templating urlconfigs Or, more exactly, I'm neither using HTTP nor HTML. So basically, I have a different input / output chain than usual. Can this work? My personal killer feature in Django is the Object / database mapping that I can do with the models, so if there's another technology (doesn't have to be Python, I'm in the design phase and I'm pretty agnostic about languages and platforms) that gives me the same abilities, that would be great, too.

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• Does C++11 offer a better way to concatenate strings on the fly?

  - by Lohoris

  I've seen this answer, and I wonder (I hope) if C++11 has come up with a native better method to concatenate, and possibly format, strings. With "better" I mean actually really one-line, like in pretty much all higher level languages (bonus points if it supports something like python's "formatted string"%(tuple) syntax but I guess that's really hoping for too much). The ideal result should be something like: my_func("bla bla bla" << int(my_int) << "bla bla bla"); The only barely acceptable methods listed in that answer are the fastformat ones, but I wonder if C++11 managed to do better.

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• Is there an ftp plugin for gedit that will let me work locally?

  - by RobertWHurst

  I'm trying to switch from a windows environment to Linux. I'm primarily PHP developer, but I do know quite a bit about other languages such as CSS, XHTML and Javascript. I need a way of editing my files locally because I work in a git repository and need to commit my saves. On windows I used Aptana and PDT. I'd save my files, upload via Aptana, then commit my work with git. I need to get a work flow going on my Linux machine now. If you know a better way to do this let me know, however my real question is, is there a plugin that allows gedit to upload files instead of working remotely?

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• Useful ways for multilanguage navigation and static content on your site?

  - by vitto

  Hi, I have a big site running under Apache and PHP and in few mounths I should consider to add some different language version of it, but I'm not sure about the right way (or ways). My problem it isn't the user data, because I can use db tables with different languages (en, de, it, etc.) so I want concentrate my answer on navigation and static content. For now I can't use gettext because I don't have a dedicated server and I can't reboot it every time I want, but surely will be a future choice. So my main problems are these: In the site, I have classical XHTML elements like the menus, lists, div and various static texts in various pages (should be perferct for gettext, but I need a alternative) The other part of the sites has XHTML elements which are dynamically created via AJAX and jQuery, and here I haven't any idea of what can I do... So does exists some example I can see in some link to solve it (or some useful tecnique)?

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• C# String Resource Values as Enum String Part values?

  - by JL

  Using VS2010 and .net V4.0 I would like to achieve the following: I already have 2 resource files in my project for 2 languages - English and Czech. I must say Resource Management in .net is excellent, I am suprised even to get code completion when implementing a String for example: string desc = Strings.ResourceManagerDesc This gets the string associated with the current culture of the thread. Now I am trying to create an Enum that can have the String portion of the Enum interpreted from the Strings resources. In the following way (This code DOES NOT WORK): public enum DownloadStatus { 1 = Strings.DownloadState_Complete, 2 = Strings.DownloadState_Failed, 3 = Strings.DownloadState_InProgress } This is a made up example, but you can see the point here. Since the above code won't work, is there a best practice way to achieve what I want?

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• Why Switch/Case and not If/Else If?

  - by OB OB

  This question in mainly pointed at C/C++, but I guess other languages are relevant as well. I can't understand why is switch/case still being used instead of if/else if. It seems to me much like using goto's, and results in the same sort of messy code, while the same results could be acheived with if/else if's in a much more organized manner. Still, I see these blocks around quite often. A common place to find them is near a message-loop (WndProc...), whereas these are among the places when they raise the heaviest havoc: variables are shared along the entire block, even when not propriate (and can't be initialized inside it). Extra attention has to be put on not dropping break's, and so on... Personally, I avoid using them, and I wonder wether I'm missing something? Are they more efficient than if/else's? Are they carried on by tradition?

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• Frameworks And 'traditional' coding

  - by YsoL8

  Hello Sorry if this too open ended for this forum, but here goes. I mostly use languages such as PHP and Javascript without frameworks (e.g Jquery, Drupal, CakePHP). The only real exception to this for me, is Wordpress when 'traditional' coding is slower for building information sites. I've dabbled with several frameworks over the past year and despite everyone else's (seemingly) good experiences with them, I seem to of hit a roadblock. My basic problem is that for the amount of time invested in effectively relearning a language, I don't get a lot in return. Jqeury as an example. There is really very little in that, that I couldn't accomplish easily with a few getElement.. commands. So my question is, what advantages do frameworks offer over previous coding styles? Thanks from 2003 guy!

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