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  • Navigating through a sea of hype

    - by wouldLikeACrystalBall
    This is a vague, open question, so if you have no interest in these, please leave now. A few years ago it seemed everyone thought the death of desktop software was imminent. Web applications were the future. Everyone would move to cloud-based software-as-a-service systems, and developing applications for specific end-user platforms like Windows would soon become something of a ghetto. Joel's "How Microsoft Lost the API War" was but one of many such pieces sounding the death knell for this way of software development. Flash-forward to 2010, and the hype is all around mobile devices, particularly the iPhone. Software-as-a-Service vendors--even small ones such as YCombinator startups--go out of their way to build custom applications for the iPhone and other smart phone devices; applications that can be quite sophisticated, that run only on specific hardware and software architectures and are thus inherently incompatible. Now some of you are probably thinking, "Well, only the decline of desktop software was predicted; mobile devices aren't desktops." But the term was used by those predicting its demise to mean laptops also, and really any platform capable of running a browser. What was promised was a world where HTML and related standards would supplant native applications and their inherent difficulties. We would all code to the browser, not the OS. But here we are in 2010 with the AppStore bulging and development for the iPad just revving up. A few days ago, I saw someone on Hacker News claim that the future of computing was entirely in small, portable devices. Apparently the future is underpowered, requires dexterous thumbs and induces near-sightedness. How do those who so vehemently asserted one thing now assert the opposite with equal vehemence, without making even the slightest admission of error? And further, how are we as developers supposed to sift through all of this? I bought into the whole web-standards utopianism that was in vogue back in '06-'07 and now feel like it was a mistake. Is there some formula one can apply rather than a mere appeal to experience?

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  • Cheetah with Cherrypy: how to load base templates, and do so automatically on change during developm

    - by Heikki Toivonen
    I am working on a cherrypy+cheetah app and would like to improve the development experience. I have everything working when I manually compile templates beforehand. However, during development I'd rather just load the templates every time they are referenced so that I don't need to kill and restart my application. I have a couple of issues I am facing: If I have templates inheriting from base templates, I get import errors (can't find base templates). I think I had this actually working during my experiments, but unfortunately didn't save it and now I can't make it work. Suppose I get 1. working, how do make it so that edits even in base templates get picked up without restart. Below is my sample application that should demonstrate the problems. The directory structure is as follows: t.py templates/ base.tmpl index.tmpl t.py: import sys import cherrypy from Cheetah.Template import Template class T: def __init__(self, foo): self.foo = foo @cherrypy.expose def index(self): return Template(file='templates/index.tmpl', searchList=[{'foo': self.foo}]).respond() cherrypy.quickstart(T(sys.argv[1])) base.tmpl: #def body This is the body from the base #end def This is the base doc index.tmpl: #from templates.base import base #extends base #def body $base.body(self) This is the extended body #end def This is from index Run it like this: python t.py Something

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  • ConfigurationManager.OpenExeConfiguration() vs XML file

    - by Vince
    Hi, Could someone tell me the advantages to using the ConfigurationManager class which load's a config file for manipulation VS an XML file with a class you build to read it yourself? Recently, I built a class which inherits from ConfigurationSection in order to manipulate a custom section within app.config. This was quite a bit of work compared to just opening and reading an XML file. Some people chose the first approach, others chose the second. What's good practice?

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  • HttpHandler to handle all kinds of URL's in Mono Apache/XSP in order to build a REST service

    - by vtortola
    Hi, I want to develop my own REST service, so I've created a HttpHandler that is configured with verb="" and path="", the the application in "~/MyRESTsrv/" will handle any derivated URL. This approach works good in IIS7 with "integrated mode" and apparently in IIS6 if you map all the extensions to "aspnet_isapi.dll". Is this possible in Apache/XSP with Mono? Do I have to do something special or it will work out of the box? Cheers.

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  • Status of VB6/ Best Desktop Application Language with Native Compliation

    - by Sandeep Jindal
    Hi, I was looking for a Desktop Application Programming Language with one of the biggest constraint: - “ I need to output as native executable”. I explored multiple options: a) Java is not a very good option for desktop programming, but still you can use it. But Java to Exe is a problem. [Only GCJ and Excelsior-Jet provides this][1]. b) .Net platform does not support native compilation. Only very few expensive tools are available which can do the job. c) Python is not an option for native compilation. Right? d) VB6 is the option I am left with. From the above list, if I am correct, VB6 is the only and probably the best option I have. But VB6 itself has issues like: a) It is no more under development since 2003. b) There are questions on support of VB6 IDE with Vista. Thus my questions are: a) From the list of programming language options, do you want to add any more? b) If VB6 is good/best option, looking at its development status, would you suggest using VB6 in this era? Regards Sandeep Jindal

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  • Rails App hangs after few requests

    - by Paddy
    I have Bitnami Rails stack installed on my Mac. To better explain my problem i created a simple scaffold based rails app with mysql as the backend. I can get to perform simple POST and GET requests for a while and after a few requests the app just hangs indefinitely. No exception caught or anything worthwhile in the development log to report this strange behavior. This is the last bit from the development log before the app froze: Processing WritedatasController#index (for 127.0.0.1 at 2010-03-30 20:38:51) [GET] [4;36;1mWritedata Load (0.7ms) [0m [0;1mSELECT * FROM `writedatas` [0m Rendering template within layouts/application Rendering writedatas/index [4;35;1mWritedata Columns (2.9ms) [0m [0mSHOW FIELDS FROM `writedatas` [0m Completed in 99ms (View: 88, DB: 4) | 200 OK [http://localhost/writedatas] [4;36;1mSQL (0.2ms) [0m [0;1mSET NAMES 'utf8' [0m [4;35;1mSQL (0.1ms) [0m [0mSET SQL_AUTO_IS_NULL=0 [0m Processing WritedatasController#new (for 127.0.0.1 at 2010-03-30 20:38:52) [GET] [4;36;1mWritedata Columns (2.0ms) [0m [0;1mSHOW FIELDS FROM `writedatas` [0m Rendering template within layouts/application Rendering writedatas/new Rendered writedatas/_form (5.9ms) Completed in 34ms (View: 25, DB: 2) | 200 OK [http://localhost/writedatas/new] [4;36;1mSQL (0.4ms) [0m [0;1mSET NAMES 'utf8' [0m [4;35;1mSQL (0.1ms) [0m [0mSET SQL_AUTO_IS_NULL=0 [0m Processing WritedatasController#index (for 127.0.0.1 at 2010-03-30 20:39:17) [GET] [4;36;1mWritedata Load (0.7ms) [0m [0;1mSELECT * FROM `writedatas` [0m Rendering template within layouts/application Rendering writedatas/index [4;35;1mWritedata Columns (2.6ms) [0m [0mSHOW FIELDS FROM `writedatas` [0m Completed in 101ms (View: 90, DB: 4) | 200 OK [http://localhost/writedatas] It just hung at this point. And after this happens i have to restart the server, for it to hang again after few requests. This is the weirdest problem i have faced and i am truly stumped.

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  • Status of VB6/ Best Desktop Application Language with Native Compilation

    - by Sandeep Jindal
    I was looking for a Desktop Application Programming Language with one of the biggest constraint: - “I need to output as native executable”. I explored multiple options: Java is not a very good option for desktop programming, but still you can use it. But Java to Exe is a problem. Only GCJ and Excelsior-Jet provides this. .Net platform does not support native compilation. Only very few expensive tools are available which can do the job. Python is not an option for native compilation. Right? VB6 is the option I am left with. From the above list, if I am correct, VB6 is the only and probably the best option I have. But VB6 itself has issues like: It is no more under development since There are questions on support of VB6 IDE with Vista Thus my questions are: From the list of programming language options, do you want to add any more? If VB6 is good/best option, looking at its development status, would you suggest using VB6 in this era?

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  • Add Ajax Support to Spring MVC

    - by Mark
    Hi, I would like to add ajax to an existing spring mvc 2.5 webapps. But i dont know where to start. I think spring does not support ajax integration. Does someone know how can I accomplish this? I was thinking that my ajaxrequest should be catch by the controller interface but I dont know where to start. I dont want to use any ajax library at this point but just plain old ajax approach Kindly send me links or tutorials if what I am thinking is possible please

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  • Fastest Strategy for Drawing Flash Particles

    - by user146543
    I am wondering what the fastest approach might be for using Flash/AS3 to render a 2D point plot (sonar lofargram) ; basically screens full of tiny 2D dots using Flash as fast as possible. Any suggestions on where to start? Is Flash capable of displaying 10's of thousands of 2D points (or more) with an acceptable fps?

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  • Deployed Qt5 Application Doesn't Print or Show Print Dialog

    - by MustacheMcLimey
    I'm experiencing Qt4 to Qt5 troubles. In my application when the user clicks the print button two things should happen, one is that a PDF gets written to disk (which still works fine in the new version, so I know that some of the printing functions are working properly) and the other is that a QPrintDialog should exec() and then send to a connected printer. I see the dialog when I launch from my development machine. The application launches on the deployed machine, but the QPrintDialog never shows and the document never prints. I am including print support. QT += core gui network webkitwidgets widgets printsupport I have been using Process Explorer to see what DLLs the application uses on my development machine, and I believe that everything is present. My application bundle includes: {myAppPath}\MyApp[MyApp.exe, Qt5PrintSupport.dll, ...] {myAppPath}\plugins\printsupport\windowsprintersupport.dll {myAppPath}\plugins\imageformats[ qgif.dll, qico.dll,qjpeg.dll, qmng.dll, qtga.dll, qtiff.dll, qwbmp.dll ] The following is the relevant code snippet: void PrintableForm::printFile() { //Writes the PDF to disk in every environment pdfCopy(); //Paper Copy only works on my dev machine QPrinter paperPrinter; QPrintDialog printDialog(&paperPrinter,this); if( printDialog.exec() == QDialog::Accepted ) { view->print(&paperPrinter); } this->accept(); } My first thought is that the relevant DLLs are not being found come print time, and that means that my application file system is incorrect, but I have not found anything that shows me a different file structure. Am I on the right track or is there something else wrong with this setup?

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  • Creating a custom TabPage control in C#

    - by Tim Almond
    I'm building a small tabbed c# Form and I'd like each tab page to have some common features, notably, an OK button and an error message and to have a space for the specific form fields. Has anyone else done something similar and how did you approach it?

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  • How to configure properly IntelliJ IDEA for deployment of JBoss Seam project?

    - by Piotr Kochanski
    I would like to use IntelliJ IDEA for development of JBoss Seam project. seam-gen is creating the project stub, however the stub is not complete. In particular it is not clear how to deploy such project. First of all I had to define manually web project facelet and add libraries to its deployment definition. The other problem was persistence.xml file. In the Seam generated project it does not exists, since Ant is using one of the persistence-dev.xml, persistence-prod.xml, persistence-test.xml files, changing its name, depending on deployment type (which is ok). Obviously I can create persistence.xml by hand, but it goes againts Seam way of development. Finally I decided to use directly ant, which is not partucularly comfortable. All these tweaks made me think that I am doing something wrong from the IntelliJ IDEA point of view. What is the efficient way of configuring IntelliJ for usage with JBoss Seam (deployment, in particular)? I am using JBoss Seam 2.1.1, Intellij 8.1.4, JBoss 4.3.3

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  • How to extend an 'unloadable' Rails plugin?

    - by Vitaly Kushner
    I'm trying to write a plugin that will extend InheritedResources. Specifically I want to rewrite some default helpers. And I'd like it to "just work" once installed, w/o any changes to application code. The functionality is provided in a module which needs to be included in a right place. The question is where? :) The first attempt was to do it in my plugin's init.rb: InheritedResources::Base.send :include, MyModule It works in production, but fails miserably in development since InheritedResource::Base declared as unloadable and so its code is reloaded on each request. So my module is there for the first request, and then its gone. InheritedResource::Base is 'pulled' in again by any controller that uses it: Class SomeController < InheritedResource::Base But no code is 'pulling in' my extension module since it is not referenced anywhere except init.rb which is not re-loaded on each request So right now I'm just including the module manually in every controller that needs it which sucks. I can't even include it once in ApplicationController because InheritedResources inherites from it and so it will override any changes back. update I'm not looking for advice on how to 'monkey patch'. The extension is working in production just great. my problem is how to catch moment exactly after InheritedResources loaded to stick my extension into it :) update2 another attempt at clarification: the sequence of events is a) rails loads plugins. my plugin loads after inherited_resources and patches it. b) a development mode request is served and works c) rails unloads all the 'unloadable' code which includes all application code and also inherited_resources d) another request comes in e) rails loads controller, which inherites from inherited resources f) rails loads inherited resources which inherit from application_controller g) rails loads application_contrller (or may be its already loaded at this stage, not sure) g) request fails as no-one loaded my plugin to patch inherited_resources. plugin init.rb files are not reloaded I need to catch the point in time between g and h

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  • Software tools to automatically decrypt a file, whose encryption algorithm (and/or encryption keys)

    - by Andrew
    I have an idea for encryption that I could program fairly easily to encrypt some local text file. Given that my approach is novel, and does not use any of the industry standard encryption techniques, would I be able to test the strength of my encryption using 'cracker' apps or suchlike? Or do all those tools rely on advanced knowledge of the encryption process (or intercepted 'keys'), meaning I'd have to build my own cracker for testing?

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  • Refactoring method with many conditional return statements

    - by MC.
    Hi, I have a method for validation that has many conditional statements. Basically it goes If Check1 = false return false If Check2 = false return false etc FxCop complains that the cyclomatic complexity is too high. I know that it is not best practice to have return statements in the middle of functions, but at the same time the only alternative I see is an ugly list of If-else statements. What is the best way to approach this? Thanks in advance.

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  • Reliable way of generating unique hardware ID

    - by mr.b
    Question: what's the best way to accomplish following. I have to come up with unique ID for each networked client, such that: it (ID) should persist once client software is installed on target computer, and should continue to persist if software is re-installed on same computer and same OS installment, it should not change if hardware configuration is modified in most ways (except changing the motherboard) When hard drive with client software installed is cloned to another computer with identical hardware configuration (or, as similar as possible), client software should be aware of that change. A little bit of explanation and some back-story: This question is basically age old question that also touches topic of software copy-protection, as some of mechanisms used in that area are mentioned here. I should be clear at this point that I'm not looking for a copy-protection scheme. Please, read on. :) I'm working on a client-server software that is supposed to work in local network. One of problems I have to solve is to identify each unique client in network (not so much of a problem), so that I can apply certain attributes to every specific client, retain and enforce those attributes during deployment lifetime of a specific client. While I was looking for a solution, I was aware of following: Windows activation system uses some kind of heavy fingerprinting mechanism, that is extremely sensitive to hardware modifications, Disk imaging software copies along all Volume IDs (tied to each partition when formatted), and custom, uniquely generated IDs during installation process, during first run, or in any other way, that is strictly software in its nature, and stored in registry or on hard drive, so it's very easy to confuse two Obvious choice for this kind of problem would be to find out BIOS identifiers (not 100% sure if this is unique through identical motherboard models, though), as that's the only thing I can rely on, that isn't duplicated, transferred by cloning, and that can't be changed (at least not by using some user-space program). Everything else fails as either being not reliable (MAC cloning, anyone?), or too demanding (in terms that it's too sensitive to configuration changes). Am I missing something obvious here? Sub-question that I'd like to ask is, am I doing it correctly, architecture-wise? Perhaps there is a better tool for task that I have to accomplish... Another approach I had in mind is something similar to handshake mechanism, where server maintains internal lookup table of connected client IDs (which can be even completely software-based and non-unique at any given moment), and tells client to come up with different ID during handshake, if duplicate ID is provided upon connection. That approach, unfortunately, doesn't play nicely with one of requirements to tie attributes to specific client during lifetime.

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  • What is the optimal way to run a set of regressions in R.

    - by stevejb
    Assume that I have sources of data X and Y that are indexable, say matrices. And I want to run a set of independent regressions and store the result. My initial approach would be results = matrix(nrow=nrow(X), ncol=(2)) for(i in 1:ncol(X)) { matrix[i,] = coefficients(lm(Y[i,] ~ X[i,]) } But, loops are bad, so I could do it with lapply as out <- lapply(1:nrow(X), function(i) { coefficients(lm(Y[i,] ~ X[i,])) } ) Is there a better way to do this?

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  • Catch Exception only in release

    - by Cicik
    HI, I have one global generic exception handler(catch ex as Exception) for all unhandled exceptions from application. But in debug mode(app runs from VS) I don`t want that exceptions go to this global handler. Better for me is when VS stops app on place when exception occurs. How can I do this, or is there some better approach for this? thanks

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  • Handling Model Inheritance in ASP.NET MVC2 & NHibernate

    - by enth
    I've gotten myself stuck on how to handle inheritance in my model when it comes to my controllers/views. Basic Model: public class Procedure : Entity { public Procedure() { } public int Id { get; set; } public DateTime ProcedureDate { get; set; } public ProcedureType Type { get; set; } } public ProcedureA : Procedure { public double VariableA { get; set; } public int VariableB { get; set; } public int Total { get; set; } } public ProcedureB : Procedure { public int Score { get; set; } } etc... many of different procedures eventually. So, I do things like list all the procedures: public class ProcedureController : Controller { public virtual ActionResult List() { IEnumerable<Procedure> procedures = _repository.GetAll(); return View(procedures); } } but now I'm kinda stuck. Basically, from the list page, I need to link to pages where the specific subclass details can be viewed/edited and I'm not sure what the best strategy is. I thought I could add an action on the ProcedureController that would conjure up the right subclass by dynamically figuring out what repository to use and loading the subclass to pass to the view. I had to store the class in the ProcedureType object. I had to create/implement a non-generic IRepository since I can't dynamically cast to a generic one. public virtual ActionResult Details(int procedureID) { Procedure procedure = _repository.GetById(procedureID, false); string className = procedure.Type.Class; Type type = Type.GetType(className, true); Type repositoryType = typeof (IRepository<>).MakeGenericType(type); var repository = (IRepository)DependencyRegistrar.Resolve(repositoryType); Entity procedure = repository.GetById(procedureID, false); return View(procedure); } I haven't even started sorting out how the view is going to determine which partial to load to display the subclass details. I'm wondering if this is a good approach? This makes determining the URL easy. It makes reusing the Procedure display code easy. Another approach is specific controllers for each subclass. It simplifies the controller code, but also means many simple controllers for the many procedure subclasses. Can work out the shared Procedure details with a partial view. How to get to construct the URL to get to the controller/action in the first place? Time to not think about it. Hopefully someone can show me the light. Thanks in advance.

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  • Precompile asp.net webpart dll

    - by mathias florin
    Hi, I have built a few custom webparts for WSS 3 using the Visual Studio 2010 Web application template. When I compile the application, Visual Studio creates the assembly file in the bin directory which I copy over later to the production server (another machine) with WSS 3. The compiled webpart dll is copied into the bin folder inside the virtual directory of WSS. I would like to precompile the webpart / dll using the aspnet_precompiler on my development machine to reduce the delay when the page is first requested. I have used the following command to precompile the entire Web Application: aspnet_precompile -v / -p PATH_TO_WEB_APPLICATION C:\WebApp -errorstack The compilation runs fine without any errors and I end up with a couple of .compiled files and also a Web_App_xxxxx.dll file inside the C:\WebApp\bin folder. From here onwards I am a bit lost how to proceed. Could you give me an advise to which folder I need to copy the compiled files on the production server? Do they need to go into the bin folder on the server or better inside the temporary asp.net folder %SystemRoot%\Microsoft.NET\Framework\versionNumber\Temporary ASP.NET Files folder? Can I precompile the Web application on a development machine without the IIS metabase? Cheers, Mathias

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  • Throwing exception vs checking null, for a null argument

    - by dotnetdev
    What factors dictate throwing an exception if argument is null (eg if (a is null) throw new ArgumentNullException() ), as opposed to checking the argument if it is null beforehand. I don't see why the exception should be thrown rather than checking for null in the first place? What benefit is there in the throw exception approach? This is for C#/.NET Thanks

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  • Do I really need an ORM?

    - by alchemical
    We're about to begin development on a mid-size ASP.Net MVC 2 web site. For a typical page, we grab data and throw it up on the web page, i.e. there is not much pre-processing of the data before it is sent to the UI. We're now making the decision whether or not to use an ORM and if yes, which one. We had been looking at EF2 AKA EF4 (ASP.Net Entity Framework in VS 2010) as one possibility. However, I'm thinking a simple solution in this case may be just to use datatables. The reason being that we don't plan to move the data around or process it a lot once we fetch it, so I'm not sure there is that much value in having strongly-typed objects as DTOs. Also, this way we avoid mapping altogether, thereby I think simplifying the code and allowing for faster development. I should mention budget is an issue on this project, as well as speed of execution. We are striving for simplicity anywhere we can, both to keep the budget smaller, the schedule shorter, and performance fast. We haven't fully decided this yet, but are currently leaning towards no ORM. Will we be OK with the no ORM approach or is an ORM worth it?

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  • Natural Language parsing of an appointment?

    - by Mike Hugo
    I'm looking for a Java library to help parse user entered text that represents an 'appointment' for a calendar application. For instance: Lunch with Mike at 11:30 on Tuesday or 5pm Happy hour on Friday I've found some promising leads like https://jchronic.dev.java.net/ and http://www.datejs.com/ which can parse dates - but I also need to be able to extract the title of the event like "Lunch with Mike". If such an API doesn't exist, I'm also interested in any thoughts on how best to approach the problem from a coding perspective.

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